Silent Witness - Episode Guide

Dr Sam Ryan investigates her first case as a police consultant - a tragic case involving the death of a child.

The murder investigation continues and someone breaks into Sam's house. Undeterred, she continues her search for the truth.

When Mark James's decomposing body is discovered, it bears all the signs of a ritualistic killing.

Sam investigates a ritualistic murder - a man is found dead in his house, the main suspect is Sebastian Bird. Everything leads to Bird. When another body is found and the police discover a book about black magic in his house they are sure of his guilt. Sam thinks he is innocent and continues to look for the true killer.

A man is found dead in his cell. It is clear that he has been murdered. Sam comes to the conclusion that one of the officers who was in the police station at the time of death has to be the killer. A police officer is also found dead, the conclusion is that he killed the man and then committed suicide. Sam thinks that they are both murders and tries to solve the case by finding the real perpetrator of the murders.

A man is found dead in his cell. It is clear that he has been murdered. Sam comes to the conclusion that one of the officers who was in the police station at the time of death has to be the killer. A police officer is also found dead, the conclusion is that he killed the man and then committed suicide. Sam thinks that they are both murders and tries to solve the case by finding the real perpetrator of the murders.

Dr. Sam Ryan's advice is sought on when the arranged marriage of a Vietnamese student, Tran, to an older man goes tragically wrong when a charred body is found in the burnt out restaurant owned by Tran's father - The victim is the man which Tran was forced to marry. Sam investigates the murder.

Dr. Sam Ryan's advice is sought on when the arranged marriage of a Vietnamese student, Tran, to an older man goes tragically wrong when a charred body is found in the burnt out restaurant owned by Tran's father - The victim is the man which Tran was forced to marry. Sam investigates the murder.

A boxer dies in the ring and Sam has to investigate his death. She discovers that he had fight before he went into the ring and that that fight indirectly caused his death. The manager of the boxer is found dead in her home, she has been shot. It looks like suicide but Sam suspects that it is murder.

A boxer dies in the ring and Sam has to investigate his death. She discovers that he had fight before he went into the ring and that that fight indirectly caused his death. The manager of the boxer is found dead in her home, she has been shot. It looks like suicide but Sam suspects that it is murder.

Sam has to do a postmortem on the body of Stuart Evans, who was found dead the morning after his party. He was terminally ill with an AIDS realted illness, but Sam finds a suspicious needle track in his foot and is convinced he has been murdered.

Sam has to do a postmortem on the body of Stuart Evans, who was found dead the morning after his party. He was terminally ill with an AIDS realted illness, but Sam finds a suspicious needle track in his foot and is convinced he has been murdered.

Sam is called to the scene of a woman found strangled with her own tights. Superintendent Peter Ross believes that it is connected to an old unsolved case, but Sam is not so sure. The dead woman was suspected of having an affair with Alan Whyte, and soon his body is also found.

Sam finds herself in danger when the murderer directly threatens her.

An old woman's body is found by two teenage boys. Sam is called in to do the postmortem. The police question Chris Palmer, and they soon become sure that he is the killer, but he denies any involvement, so Sam sets out to find who the real killer is.

An old woman's body is found by two teenage boys. Sam is called in to do the postmortem. The police question Chris Palmer, and they soon become sure that he is the killer, but he denies any involvement, so Sam sets out to find who the real killer is.

Sam is shaken when she has to look into the death of a very dear friend, Dr. Annabelle Evans, a Cambridge professor. She was found in her home, badly beaten in what appears to be a botched burglary attempt. The police immediately focus on the husband as the likely killer but Sam suspects that an altercation at a local restaurant during the May Ball, where a waiter spilled wine on Annabelle and was fired on the spot, may provide another suspect. Sam is also intrigued by the relationship some of her students may have had with Annabelle, particularly when she learns her ...

As Sam, et al continue to look into Annabelle's violent murder, another woman is similarly assaulted.

Gemma Boyd, an attractive 17-yr old, is found dead at the bottom of a staircase. Although the cause of death was a broken neck, there is little to indicate whether she fell or was pushed. She was found in a vacant house that her estate agent mother and step-father were selling. The autopsy reveals that Gemma had already had a child and was pregnant. The police think that Gemma's boyfriend is their man but when someone else is revealed as the father in the latest pregnancy, Sam thinks there is a far more complex set of relationships at play. Sam's sister Wyn visits ...

The 2 nd part of A Fallen Idol. A 17 year old attractive teen was found dead at the bottom of a staircase in an empty house for sale. Family dynamics and a boyfriend are the focus here. Meanwhile the Pathologist makes a decision about her boyfriend.

Sam Ryan looks into the death of Maggie Collins who died of a heroin overdose. Sadly, her body wasn't discovered for several days and in that time, her infant daughter died of dehydration. Soon after Maggie's death Stephen Jackson, a small-time dealer and addict, is killed in an explosion in his home. The autopsy reveals that both of them died of overdoses from the same batch of heroin and Sam begins to doubt that their deaths were accidental. When another small-time dealer is killed, the police think they have either vigilantes or a turf war on their hands. What they...

Are the deaths linked to a drug war or to vigilantes?

When Philip Nelson is killed in a farm accident, the pathologists conclude they have a straightforward case of man vs. machine and the machine won. Sam makes an error however and soon finds evidence that points to murder. The police suspect his handyman, all the more so when they discover he was having an affair with Nelson's wife. When the murders continue however, Sam uncovers evidence that connect at least some of the men to events in Northern Ireland when they served in the army together many years before. Sam is more than a little surprised when Charlie, an old ...

Sam looks for connections between Ian Neal and a killing in Northern Ireland in 1985.

After a helicopter sends out a mayday and disappears in a storm en route to provide support to an off-shore oil rig, Sam is called upon to participate on the rescue team in case it turns into a recovery team.

After a helicopter sends out a mayday and disappears in a storm en route to provide support to an off-shore oil rig, Sam is called upon to participate on the rescue team in case it turns into a recovery team.

Sam Ryan takes on a gangland murder case to help builder Brian McNally, whom she believes to be innocent.

Following the death of murder suspect Brian McNally, Sam Ryan is approached by his daughter.

When a dozen people die in a cinema fire, Connor is in charge of the investigation. Sam Ryan is coming back to Cambridge.

Having learned that violent criminal Chris Caldwell may have been wrongly convicted for murder, Sam and DCI Michael Connor are eager to get at the truth.

When twin brothers Jake and Henry Davies are found dead in their home, the police initially suspect robbery as the elderly gentlemen were known to keep large sums of cash in the house. The autopsy reveals murder however and Sam determines that skin grafts both men have on their arms may have been a crude form of plastic surgery meant to cover tattoos of concentration camp numbers. Thinnking they are now dealing with a hate crime, the police focus on Carl Martin, a known race-hater. What they have however is a case of someone seeking revenge for the atrocities ...

The continuation of part one, sees Sam delve further into the WW2 atrocities and how it continues to affect those survivors today, as she helps with the investigation about the murder of the twin brothers.

When the naked body of a young woman is found in the snow at a Norwegian ski resort, Sam Ryan is asked to represent the Townsend family whose daughter Ruth disappeared there several weeks before. The autopsy however reveals that it is in fact the body of Louise Hutton who had vanished there some 15 years previously. When Ruth's body is subsequently found, it appears both girls were strangled in a similar fashion. The police focus their enquiries on Ruth's boyfriend and on Henry Hutton, Louise's uncle while Sam seeks the advice of a university colleague and tries to ...

Sam learns more about the personality type that has now killed 3 girls.

Sam Ryan is under great stress when she learns that she may have a tumor. As a result, she starts to question her judgment when she misses a possible explanation in determining the time of death in the case of Lloyd Dupen's wife, an apparent suicide. She's not convinced however that everything is above board and agrees to undertake a second autopsy at the request of the dead woman's mother. She's also asked by Bishop Craig to perform an autopsy on the remains of Sister Constance, a beatified nun who died forty years ago and is under consideration for canonization. The results of the autopsy will have an impact on the religious order as well as many of those in the community who see the commercial advantages of having a local saint.

Sam's medical condition seems to worsen as rumours fly about her losing her job due to bad judgement.

Sam Ryan assists the police in the investigation of a multi-vehicle collision that results in the death of 11 people. She is joined by two new colleagues: Dr. Leo Dalton, an experienced pathologist from Sheffield and Dr. Harry Cunningham. As they try to determine the causes of the accident, they find a severed arm that does not belong to any of the victims. They also have to deal with DCI Carol Deacon whose role in the investigation is not quite clear to them. Sam and Leo have somewhat different approaches to their job, particularly in how they deal with the police. Harry performs his first autopsy on a child.

The mystery of the severed arm is partly solved when the police discover a body floating in the river with a missing arm. The pathologists continue their investigation with little help from the police and DCI Deacon in particular. When she reveals to Tom that two of the men in the accident were undercover policemen, he realizes that Sam was correct and that he is being manipulated. The police refuse to tell them what is going on and Sam's interference has serious consequences. Harry continues to try and find a balance between detachment and compassion as one of the survivors of the crash seeks his assistance.

The police investigate an apparent break-in that results in the death of Derek Irons, his wife and youngest daughter. Two older children survived the attack but one is in serious condition and in a coma. Irons was a ruthless businessman who targeted his rivals' customers resulting in regular confrontations. Irons was stabbed but his wife and daughter were shot. Sam is reunited with an old friend from Northern Ireland, Det. Supt. Tony Ashton who is the senior investigative officer on the case. Harry assists the police with the death of an old woman who is believed to have fallen down a staircase. His post-mortem reveals evidence that is not consistent with a fall.

The police continue their investigation into the deaths of several members of the Irons family but based on the forensic evidence, they now believe he may have been killed elsewhere and then transported to his home. When one of Irons' two surviving children is killed, they look to his circle of friends and family for a possible motive. Thanks to Harry's information, the police investigate further into the death of an elderly woman who supposedly fell down the stairs in her home. Supt. Tony Ashton clearly wants to renew his friendship with Sam but she isn't so sure. Leo's home life is in turmoil and it's been affecting his work.

When a decomposed body is found hidden in the wall of an old factory building, Sam Ryan concludes he was murdered. He is eventually identified by his ex-girlfriend Selina Thomson as Marcus Saul, who had simply disappeared one day some seven years earlier. There has also been a break-in on campus and drugs have been stolen. The Dean asks Leo Dalton to speak to some of the students on the issue, but he's not quite sure what he can do.

With the death of a student from a drug overdose, the university must face the wrath of the girl's father, a major benefactor. The autopsy reveals that not only had she taken drugs but also that she had sexual relations with three different men in the previous 48 hours. Although the police have a suspect in the murder of Marcus Saul, new information suggests that the identity of the killer may lie in a completely different direction.

The police may have a serial killer on their hands when they locate a second body in a site where the first victim was found several months before. The body was trussed up in the same way and had an identical burn mark on his back. There is no apparent link between the first victim, student Michael Haughty, and the second Jason Villers, a probationer at the police college. While the police find evidence that may solve the Otty case, they have nothing on the Villers murder. In a separate case, Harry is approached by the wife of an old university friend who asks him to perform a post-mortem on her husband who died in a fall. Harry finds that his old friend was injecting himself regularly. Leo's family is visiting for a few days but he's constantly being called into work.

When a second police probationer dies at the police college, Sam concludes that they may be dealing with a copycat murder rather than a serial killer. The investigating officer thinks that a fellow probationer may have been responsible for the original murder but the college's commandant, whose son is a student there and soon to be a police constable, would like the reputation of the college protected and the whole thing swept under the carpet. Harry learns that his late friend's wife was prescribing the drugs he was taking and is not quite sure what to do with the information. Leo's relationship with his wife and daughter is stretched thin when he spends most of his time at work and they are left on their own.

In a suspected terrorist attack on a London hotel a government minister is killed. As Sam and the team investigate the case, old friends and government officials soon muddy the water.

Sam comes under intense scrutiny during an official inquiry into the deaths of two brothers while they were in prison. Her findings are soon challenged by her colleague, Leo Dalton, who is brought in to perform a second autopsy. Meanwhile, a series of murders that are taking place cast suspicion on a recently released ex-convict. He served years in prison after being convicted of killing his wife; the evidence against him was given by Sam during one of her very first cases. During his time in prison, however, he continued to deny his guilt. Sam begins to believe that someone is stalking her, while the police have trouble locating the ex-convict.

Sam and Leo, colleague Pathologists, are on opposing sides of a high-profile court case.

A John Doe is found months after his death; an attractive female agent for a championship athlete is believed to have jumped to her death from a rooftop. Forensic pathologists must sort out time and methods of death.

Sam Ryan steals a toothbrush to get the DNA of the father of the unborn child of a suspected suicide. Tangled relationships between an athlete and his family are amplified when his body is found hanging in her apartment. Police arrest the athlete's brother-in-law after an anonymous tip. Harry's attempts at determining time of death by the growth of maggots give a wrong answer.

Questions about a celebrated pathologist's accuracy in past cases leads to several exhumations; Sam Ryan is assigned to reexamine the remains. One particularly brutal murder conviction depends on the time of death being precise. Two crucial witnesses are found: one on her deathbed, anxious to get something off her chest, and the other dead behind a remodeled wall.

Sam is determined to find out how Dr. Sachs is able to pinpoint time of death so precisely, even if it means several convictions are overturned. A mother changes her plea to guilty, but Leo is still not satisfied that they have the truth. A loving daughter draws a picture for her prisoner dad that brings a confession. Dr. Sachs is found to have violated professional ethics, but what will serve the cause of justice best?

Harry is called out to a death at a racecourse. A jockey was killed when his horse pulled up and fell, crushing him to death.

The police and Harry find that a group of doctors are in a syndicate that owns race horses. One is a kidney Specialist and another is a Plastic Surgeon with a gambling problem. A young woman is going to pay for a kidney transplant privately as the National Health Service wait list is long. She and her husband wish to have a baby after that. There is a helicopter accident and it all becomes a complicated story to figure out for the team of Pathologists who have a temporary visitor called Nicki who is borrowing the lab to obtain a narrative about an Iron Age family ...

The team investigates the derailment of a train caused by someone leaving Maj. Mark Wiltshire's Land Rover on the tracks. The army is suspected but Wiltshire was in the officers mess at the time. The team have yet to identify the 21st victim, or determine if that person was on the train or in the car. Working with a survivor's group, they try to re-create where everyone was seated just prior to the crash occurring. When one of the survivors commits suicide, the crash claims its 22nd victim.

The investigation continues and one of the survivors remembers a vital piece of information. It becomes evident that the identification of body 21 may also lead to the cause of the crash. In the end, the solution rests on discovering a an unknown romantic affair and marital betrayal.

The team is shocked when Leo Dalton's wife and daughter are killed when a fancy sports car careens out of control and smashes into a café. The police are puzzled by the cause of the crash but believe the driver may have been involved in a identity theft ring when they find several several passports and ID cards in the vehicle. Meanwhile, Nikki must perform urgent autopsies on two bodies found floating in the river. When she finds fingerprint evidence linking one of the bodies to the car accident, it becomes apparent that the two cases are linked and the police may ...

Unsatisfied with the progress of the case, Leo Dalton takes matters into his own hands trying to get in contact with an identity theft ring. The information he gathers assists the police and they work together. The death of one of the gang members, and a vital clue, lead police to identify the their leader, but in the end, the solution brings little solace to Leo.

The team is called to a drive-by shooting outside a London nightclub. They arrive to a scene of carnage with several people dead, or dying.

With the murder of the club manager, the pathologists also determine that the club owner shot his own girlfriend, likely by accident. They also identify an unlikely suspect in the shooting of the club manager. Harry and Nikki confront Leo over his abusive and unprofessional behavior.

Harry investigates the death of a woman who drowned in a backyard pool. She was apparently struck on the side of the head and her husband claims that her expensive necklace is missing. Leo and Nikki investigate the death of Lucie Philips, a kidnap victim who was taken a week previously. The girl's father tried to pay the ransom but the money was never collected leading the police to believe that the kidnappers may have had other motives. They also investigate the murder of a pizza deliveryman that has similarities with the Philips crime scene. A third murder leads the...

Leo and Nikki find yet another victim who was apparently bound and buried alive. However, they continue to have difficulty finding a common link among all of the victims. The investigation focuses on the editor of a philosophical journal who had an intellectual disagreement with one of the victims but the case is more complex than first imagined. Harry discovers that his drowning victim was pregnant which may have indirectly contributed to her death. Nikki's father is released from prison and promptly disappears.

The team investigates two deaths, the first a suicide where someone jumped to their death and the second where a paranoid schizophrenic dressed as a vicar goes on a rampage stabbing innocent bystanders. Their suspicions are aroused when they learn that both men were receiving treatment at the same clinic, January House. Leo assists the police in their investigation of a building society employee who is forcibly taken from his house and subsequently found dead in his own car. Harry is asked to perform an autopsy and provide a second opinion in the death of a young ...

The Director of January House tries to take his own life on the clinic grounds and the pathologists suspect they may have a case of adulterated prescription medication. Harry's repeat autopsy reveals that the young woman was also under medicated, but she had no contact with the clinic. The police suspect the wife in the case of the building society employee and Leo sets out to disprove her time line.

When a boat carrying illegal passengers is found crashed in the Thames, the team investigate.

The team follows the trail of the people traffickers, and has to find any remaining survivors before a highly contagious disease breaks.

Harry investigates a case of hit and run where the victim was a 16 year old boy from the nearby housing estate. Working with Sgt. Susan Fenn, they attempt learn if this was an accident or intentional. Harry takes quite a liking to Susan and is shocked by a sudden turn of event. Leo examines a death resulting from a house fire where the lady of the house died. He is puzzled at why she was unable to leave and the police immediately suspect the husband, who was in a nearby park with the children, of murder. Nikki looks into the case of a young woman who collapses at her ...

The pathologists busy week continues with a variety of cases. Nikki examines a death in a telemarketing office. Several workers were vying for promotion and the police suspect foul play. Harry deals with the case of a professional footballer who committed suicide. He realizes there is a link to another case he is working on. Leo deals with the case of a drunk who died on a bus. There is little information about the man and the case becomes more of a puzzle when the autopsy reveals that he wasn't drunk at all.

Harry is shocked when his former university girlfriend, Penny Harris, is brought in dead. She drove her car into a tree and the police initially suspect suicide but the autopsy reveals that the medication in her system was ground rather than in pill form, so they conclude she was likely murdered. Her husband tells the police that he thought his wife was having an affair and her parents react strangely to the news. Leo assists the police in the death of Jimmy Triangle, a conceptual artist whose latest work dealt with the death of conceptual art - and includes his own ...

Nikki and Harry continue to investigate the death of Penny Harris. Harry is shocked to learn that she had apparently at some point in her life had a child but her husband denies any knowledge of such. Another death in the Harris family allows them to narrow the suspects and identify the killer. Leo continues to look for clues and the police think they have solved the case through fingerprint evidence, but Leo is able to prove that the suspect has been framed. The victims penchant for videotaping his activities provides a vital clue.

Alison Garland is a 14 year old schoolgirl found dead on the school grounds just after lunch. She appears to have slit her wrists and committed suicide, but there is also evidence that she had sexual relations just earlier that day. As Leo Dalton looks into the case he learns that Alison was also a school bully and was a very unhappy young woman. Harry assists the police in the stabbing death of a car dealer. The evidence suggests that he was stabbed in his garage and his body then dumped. The case takes a radical twist when they find that the knife found by Alison's ...

A third murder is discovered on school grounds and Leo realises the killings are connected to a sinister teenage pact. Meanwhile, Nikki proves her elderly victim died of hypothermia - but there is still a guilty party to be caught.

Harry and Nikki deal with the case of a young woman who is found dead in an animal shelter. Her dead body has obviously been posed and the autopsy reveals she may have been tortured before death. Information from police intelligence suggests that they may be dealing with a group of radical animal rights activists. It all becomes quite personal for Harry when Nikki is taken prisoner. It's also a difficult time for Leo who has been asked to appear before a medical council hearing and testify on the propriety of a close friend's medical research. Harry has been offered a...

Harry and the police desperately search for Nikki as they continue to find more bodies. The animal rights activists' target is a well known pharmaceutical firm that is undertaking research on behalf of the government. Leo finally decides on a course of action in testifying at the medical council hearing.

The pathologists investigate when a military helicopter crashes into a refugee detention center. Harry and Nikki actually witnessed the crash and were first on the scene but the case is complex since the center was Ministry of Defense property leased to the Home Office. The team is shocked at the conditions they find in the center and Harry, who has a close friend in the RAF, is shaken when a government Minister attributes the accident to pilot error.

Harry is convinced that the RAF is trying to cover up the real reasons for the crash. This is re-enforced when the dead pilot's father tells him that no one liked or trusted the particular type of helicopter that crashed. When given a chance to perform the post-mortem on the pilot, they find a possible physical cause however. In examining one of the dead refugees, Nikki concludes that he had undergone plastic surgery. She attempts a facial reconstruction to see if they can identify him.

Leo Dalton investigates the death of a young boy whose body is found in the river. He was badly abused and his hands and feet were severed. The child is found to have been HIV positive and the pathologists determine that he may have been the victim of a ritual killing., perhaps as part of an exorcism that went too far. When the skeletal remains of another child are found, Leo believes the police have focused their investigation on the wrong man. Nikki Alexander investigates the apparent suicide of Father Anthony Reid who appears to have jumped from his apartment ...

When a second person, Vincent Fricks, is found dead with ligature marks around his neck, Nikki and Harry not only find a connection between the two dead men but also with the school where Father Reid committed suicide. They also find another common link between the three. Leo Dalton continues his investigation into a local church that combines Christian with African beliefs and customs. He manages to find physical evidence linking one of the dead boys to the church.

Harry Cunningham investigates when a car accident reveals two bodies inside one coffin. The coffin contained the body of 80-year-old Ethel Mortimer, who was supposed to be there and also that of James Featherton, a high tech sales rep who also had a heavy cocaine habit. Leo Dalton and Nikki Alexander have to deal with the death of a young child who died post-operatively. The pediatric surgeon in the case, Alice Huston, is well known in her field but may be prone to undertaking aggressive surgeries. The pathologists find a connection between the two cases when ...

With Claire Kowalski missing and Nikki Alexander unconscious from a blow to the head, Harry and Leo investigate exactly what is going on at the hospital. Harry discovers that a member of Huston's surgical team is not who they claim to be and has actually stolen the identity of someone who died six years before. Blackmail is at the center of it all and it turns out Alice Huston is hiding a secret. However, the killer is identified only by looking to old friendships and the calling in of an old debt.

Nikki Alexander finds herself working on a case from her past. Four years previously, she had been instrumental in getting 17 year-old Anna Holland acquitted of a murder charge. She had been accused of egging on her boyfriend in the murder of a young mother they chose randomly. Now, while under police protection, her body has been found in a burnt car. The autopsy reveals that she had been stabbed but had died from carbon monoxide poisoning and so was burnt alive. Nikki also receives a surprise visit from her estranged father who wants her to perform a second autopsy ...

Nikki Alexander begins to have serious doubts about her conclusions four years previously when her testimony helped acquit 17-year-old Anna Holland of murder. Anna's mother had withheld information from the police and as Nikki reconstructs the scene of the crime, she realizes that the blood spatter evidence no longer holds up. The police focus on the dead woman's husband but the pathologists find that a series of unsolved murders may have a bearing on the case. Nikki is also annoyed with her father, who has conned Harry Cunningham into completing a second autopsy on ...

Harry Cunningham is asked to review a case in a insurance dispute. The insurance company is refusing to pay out on an policy when the autopsy results show that the woman was intoxicated and likely was responsible for the fall that killed her. Her family insists that that is impossible as she was an abstainer. Nikki Alexander investigates when human remains are found buried in an field. The locals believe the body to be that of Clara Young, who had disappeared 18 months before. The remains are found on the site of a travelers or gypsy caravan site and the police are ...

George Wood is released by the police but he is soon found dead in his caravan. Although made to look like a suicide, it is clearly a murder. The case gets even more complicated for Nikki and the authorities when she determines that there are the remains of two victims in the field, not just one. The evidence in the George Wood murder points to someone with connections to the police. Harry Cunningham believes that the dead woman in his insurance case was likely suffering from dementia and looks to prove the cause

Following a court appearance for drunk driving, Leo is required to perform unpaid work as a punishment, assisting AJ, a community worker on a run-down,largely black-occupied housing estate in South London. AJ is hoping to divert boys away from crime by encouraging them to do sports, and, though initially dismissive of Leo as a white intruder, comes to respect him after he has saved the life of Errol, a former gang member now anxious to keep his little brother Levi out of trouble. Errol has been stabbed in the leg by members of a gang from a rival estate and Leo stops ...

The examination of the latest body from the housing estate proves it to be that of Errol Harris who was asphyxiated while being tarred and feathered. The policeman in charge of the case, DS Nick Wallace, is exasperated at the lack of physical evidence the pathologists are able to provide him as without concrete proof of who is involved in the killings, he knows they will never get a conviction. Leo Dalton thinks that the key to getting information is Errol's younger brother Levi who is actively being recruited to join the gang. Tragedy ensues however after the police ...

The team is called in to identify the corpse of a woman whose face was surgically removed after death. Janet Mander, a Home Office anthropologist, cannot link it to similar murders but, after Nikki has reconstructed the face, Holly, a medical student on work experience with Harry,recognizes the woman as Fran Price, an investigative journalist. Pargeter, her agent, is evasive and Supt. Barker, the investigating police officer, does not help as he is obsessed with the idea that Leonid Polyak, a Russian criminal Fran helped to put behind bars, has ordered a hit on her ...

Everyone is affected by Holly Farr's murder. The pathologists find that she was tortured and beaten but died from having her throat slit. The police believe that her death is related to that of Fran Price and the recent leaks of forensic evidence to the press may have led the killer to her. Supt. Barker decides to put armed policeman to guard each of the three pathologists but Harry Cunningham, who saw Barker go into Holly's house, is suspicious of his true motives. When a prominent Russian, Oleg Kolik, seeks asylum in the UK saying he is the true target of the ...

The team is called in after Mr. Stickley of the Police complaints Board feels that something is not right about an armed police raid on a house where several people were killed, including one of the officers and a mystery woman. A young Muslim called Melik has been badly wounded and lies in hospital. Mr. Stickley believes the policeman was killed by Rhys Allen, a colleague who was having an affair with the deceased's wife. Melik's sister Isra confides in Nikki that all the 'suspects' were unarmed and not terrorists and fears of a cover-up by the authorities are not ...

Harry Dalton and DI Helen Okoroafor manage to identify the dead woman from the scene of the raid - who turns out to be a DS who was working undercover and who the police refused to identify when the pathologists submitted her DNA sample to them. While DI Tranfield continues to search for the terrorist cell that he is sure is about to strike, Nikki Alexander continues to try and piece the evidence together from the scene of the raid but clearly there are pieces missing. A re-creation of the shooting shows her what happened and also identifies the only person in the ...

Harry Cunningham investigates the death of a young Orthodox Jew. He accedes to the family's request that he not use invasive procedures in his examination and finds that the young man was savagely kicked and beaten to death. DI McKenzie has a suspect in custody but from what medical and forensic evidence Harry is able to find, with Nikki Alexander's assistance, it's obvious that the family is lying about the young man's whereabouts the night he was killed. Leo Dalton meanwhile investigates the death of a young student who died from a drug overdose. Leo is ...

With a second member of the Orthodox Jewish community dead, Harry performs a complete examination. This time, Harry does not hesitate to use all examination methods at his disposal and finds forensic evidence that clearly links a third member of the Hassidic community to both deaths. After DI MacKenzie makes the arrest however, Harry realizes he may have inadvertently contaminated the DNA evidence leading to a false result. Nikki retests all of the evidence and together they figure just who the attacker was. Leo Dalton meanwhile tries to prove that the dead student ...

The half-naked corpse of a twelve-year-old boy is found in his school grounds and Liam, the child in whose company he was last seen, has disappeared. Nikki is particularly involved because the school's head teacher,Noel Hopkins, is the teacher who, years earlier, encouraged her interest in science.

A severely mutilated corpse is found on a railway line, belonging to a known paedophile in his twenties, Francis Neil. Noel Hopkins is arrested, following revelations years earlier of an affair with a young pupil Nikki believes to be Francis but he is released due to insufficient evidence, though he is sacked from his job and his house torched, his saviour being Danny, father of the dead boy Michael. It is ultimately revealed that in fact Liam did not exist - he was the 20-something Francis, obsessed with Michael, and both were victims of the paedophile ring. ...

Stephen Harrington, a friend of Leo, is concerned that his daughter Rachel, an aid worker, has gone missing in Zambia. Leo and his colleagues fly to Africa where Rachel's corpse is discovered. It seems that she was investigating the deaths of local villagers and may have been silenced. In the absence of the local coroner, the team get involved but find that uncooperative police officers are not exclusive to Britain.

With another aid worker now dead, the pathologists are trying to piece together just what Rachel was up to. Dr. Andrews tells them that Rachel had been trying to trace the source of an infectious disease that she believed had been affecting many of the local villagers. She had originally believed that the disease was water-borne but all tests had proved negative and was therefore looking at other possible sources. Yet another death however strikes the local ex-pat community. With tensions rising, Nikki finds herself in jail and and Harry getting the cold shoulder from...

Leo comes under suspicion for fraud when an insurance investigator accuses him of falsifying a post-mortem report, and Harry falls for the charms of an attractive former colleague.

Harry puts his career on the line to prove his lover's innocence after Leo is attacked.

Harry and Nikki find themselves on opposite sides of a high profile case.

A revelation emerges that Flannery's first wife also died of a stair fall.

Leo is concerned that the police are involved with a cover-up to protect a rogue undercover cop linked to the death of a young woman.

With Danielle missing and her lover on the run, Leo and the police struggle to unravel a complex web of deceit.

Nikki and Harry try to help wounded victims of a campus shooting while trapped in the building with the rampaging shooter.

Nikki and Harry try to help wounded victims of a campus shooting while trapped in the building with the rampaging shooter.

An asylum seeker from Zimbabwe is unfairly deported to South Africa, and Leo strives to find a way to have her return to the UK, which may be more complex that it would first seem.

An asylum seeker from Zimbabwe is unfairly deported to South Africa, and Leo strives to find a way to have her return to the UK, which may be more complex that it would first seem

When the pathologists investigate three suspicious deaths in one night on the same ward, it looks like hospital staff may be behind their murders. Nikki becomes increasingly disturbed by a rape and murder case involving a young child.

Nikki's mental instability worsens, and Harry and Leo are forced to get her psychiatric help. When the true identity of the murderer is discovered, it becomes a race against time to save Nikki's life.

Leo finds himself haunted by past memories when he returns to Sheffield after an ancient body is unearthed on Bleaklow Moor.

After a preserved female body is discovered buried in a peat moor in Sheffield, DI Sonia Hardwick turns to an archaeologist called Professor Patrick Cain for help. Nikki discovers knife wounds to the hands which the professor believes may indicate a ritual killing as the autopsy on the body is carried out. Leo ends up searching through his archives for a case he dealt with in Sheffield in 1985 that were committed by self-confessed serial killer Karl Bentley. As he examines the body himself he is caught by Nikki and Leo tells him he thinks the body could belong to a woman called Jodie Fisher who went missing at the time.

Nikki is called to perform a post mortem on the body of a woman found in a river, and the discovery that she had recently given birth causes the pathologist to worry her child may be abandoned somewhere. Meanwhile, Harry investigates the apparent suicide of a lieutenant at a nearby Army base, and suspicions soon arise that the two cases may be linked.

An X-ray of Lt Lockford's skull reveals a second bullet, confirming suspicions that he was murdered. Danny Ferris's father is not satisfied with the verdict on his son's death, and asks Nikki to perform a second post-mortem, and as the investigation continues to unravel, a tragic secret is revealed at Hillsdon Army Base.

Harry is reunited with Anna Sandor when she calls him to Budapest to perform a second post-mortem on the body of a drowned prostitute, Sofi Mustafova. As they get reacquainted, Anna tells him she believes the death is suspicious and may be linked to her own investigations into the disappearance of other pregnant prostitutes.

Nikki makes her way to Budapest but there's not much she or Leo can do as every move they make is being watched by Tibor Orban. Leo manages to secretly meet Nikki where he reveals that Harry is still alive. Harry explains why he had to fake his own death and continues that he must find out why Anna was killed and unravel the dark secret of the prostitution racket.

Chief Inspector Rebecca Woods and some members of the Diplomatic Protection Group head to the Dutch embassy to investigate a shooting. They discover Ambassador, Pieter Van Buren, holding his wounded daughter Klara. He demands that the the DPG team leave and Woods has no choice but to agree given it is officially Dutch territory.

Harry discovers evidence of extensive plastic surgery on the corpse of the bodyguard as an autopsy is carried out. Nikki takes a look at the evidence from the 1996 disappearance of Jacob. The Van Burens' version of what happens becomes increasingly unlikely and when the body of the family's au pair, Mary Olivant, is found hanged near the Van Buren family home, Leo discovers the remains of a young boy in the ground.

When Leo's friend commits suicide, Harry and Nikki are called to the scene of a violent and calculated murder, which is thought to be the work of an apparently dormant serial killer.

Harry and DI James deviate from the original investigation to secretly test DNA evidence from the rival Chesham laboratory to try to solve this stalled case.

Harry is disturbed to be called to a crime scene at the home of a family he knows, and finds the bodies of the mother and her teenage daughter, while her stepson lies in a coma - although her toddler has been left unharmed. The police suspect the woman's husband to be the killer - but the pathologist is not so sure of his guilt. The double-murder investigation reveals more about the tangled lives of the inhabitants of Magnolia Drive

Harry and Nikki delve deeper into the tangled lives of the inhabitants of Magnolia Drive.

Nikki is approached to help identify the paltry remains of a serial killer's undiscovered victims.

Nikki is forced to confront manipulative serial killer Arnold Mears face-to-face in order to save Annie.

Leo battles with the authorities at the notorious Redhill prison to seek justice for the murder of an ex-prison inspector.

While Harry and Nikki investigate DI Bridges, Leo puts himself in danger when he follows his instincts and trails violent prison officer Kessler.

Leo is determined to uncover the truth surrounding the mysterious death of a young girl who was being treated by his college friend Delaney.

Nikki and Harry track down the Catholic nun behind the exorcism, only to find that John now believes he's possessed - but can he be saved?

Nikki stumbles across a sinister underworld where teenage girls are groomed for sex and forced into prostitution.

Harry and Nikki make a crucial connection between the dead girls and sex-grooming victim Shannon, but is it too late for Hannah and Lauren?

When John Briggs, a wealthy business owner, is found dead, Nikki works with forensic scientist Jack Hodgson to convince DI Gold it was murder. Leo, warned by the Home Office to rethink the Lyell Centre's operations, helps Nikki prove Briggs died from a mysterious allergic reaction. However, as suited sharks circle to buy Briggs' ailing company, Jack believes someone exploited this allergy to kill.

Briggs' estranged daughter Geraldine is left the company in his will, yet she is shocked that he had tracked down her long lost daughter Deanna, and the pair make up for lost time. But when Deanna's body is discovered in the Thames, Nikki, Jack and DI Gold are sure the murders are linked, as Leo decides how to safeguard the Lyell Centre's future - employing Jack to launch a forensics department. As the new team are cemented, evidence from Deanna's body provides a vital lead on the killer's motive.

Whilst Nikki, Leo and Jack struggle to ascertain how Deanna was killed and ended up in the Thames, DI Gold focuses on two main suspects in John Briggs' inner circle. However, when Geraldine makes a sinister confession about why she gave her daughter up for adoption and disowned her wealthy family, it dramatically changes the course of the investigation.

With the family's skeletons in the closet now exposed for all to see, the future of the ailing company hangs precariously in the balance. But when a third murder victim is found, it gives the team the forensic evidence to unravel the mysterious motives and smoke out the killer.

The case of two young women shot dead in a house basement forces Jack to lock horns with an old flame, the ambitious DI Chrissy Reed. As the pair's animosity rapidly escalates due to their conflicting motive theories and failure to ID the victims, Nikki's probing unearths the potentially career-damaging truth behind it.

Meanwhile, Leo wrestles with providing a second post-mortem on a baby suspected of being abused and smothered to death by his mother, Shona. The father, Mark, is adamant she is innocent. He pleads with Leo to find an alternative cause for their son's fractures and death to free his wife before their other son, Darius, is adopted. However, Leo soon realises that to achieve this he must re-examine the work of his pathologist friend, Richard Fell, and prove he made a mistake in his evidence against Shona.

As the basement women case highlights two cooperating killers, Nikki, Jack and DI Reed realise one victim was killed by a controlled sedative, stolen from a high-tech vaccine research lab. And suspicion falls on Lucas Ballinger, a scientist who works there. Meanwhile, Leo draws a blank with his theory that Shona's baby died of natural causes, but when he discovers Mark's violent past, Leo fears Shona may have taken the rap for her partner's child abuse.

Jack makes a chilling forensic breakthrough which exposes a dangerous plot to breach national security, leaving the Lyell Centre paralysed by a government-imposed lockdown. With Nikki, Jack and DI Reed locked in a race against time to find Ballinger and prevent mass casualties, Leo has one last shot at proving that Shona's baby died from natural causes in a desperate bid to reunite her and Mark with their other son before he is adopted.

When a pub landlady is stabbed to death and her little finger cut off, her husband, Roly, is the prime suspect. However, as Nikki, Jack, and emotionally fragile detective, DI Kate Warren, piece together mounting evidence, inconsistencies lead Nikki to believe Roly's innocent. She's desperate to reunite him with his traumatised daughter, Emma, who faces a life in foster care if her father is imprisoned.

Isolated in her quest to prove Roly's innocence, Nikki is defeated when Roly is charged with murder, and about to lose his daughter forever. But when Nikki and Leo unearth several old murder cases where the victims' fingertips were cut off, they begin to suspect Roly is the new target of a serial killer. The spotlight soon falls on ex-cop Alan Lane, who served eight years for killing his wife, Imogen, despite her body never being found, only her severed fingertip.

When arrested and interrogated by DI Kate Warren, Alan Lane vehemently protests his innocence and insists he never killed his wife Imogen, but when Jack and Nikki fail to get concrete evidence in time to charge him, Lane walks free. However, when the team finally unearth the shocking truth about Imogen's murder, it exposes a web of lies and deceit which puts those connected to the case in imminent danger from the sinister Alan Lane. As their fears about the ex-cop intensify, Nikki and Jack must swerve the sceptical police and piece together their evidence to build a water-tight case against Lane fast, in order to prevent more innocent lives being lost.

Nikki and Jack are under pressure when a teenager's remains halt an eco-housing project, while Leo is trapped in a dangerous hospital siege as distraught Tom Hancock holds a ward at gunpoint to turn off his terminally ill son's life support. Leo agrees to do his son's post-mortem to diffuse the situation, and becomes embroiled in Tom's quest for the truth behind his son's cancerous tumours.

When Leo discovers that Tom's son had the same kidney disorder as the housing project victim, he suspects a dangerous local health hazard. Far from convinced, Nikki enjoys a whirlwind romance with charismatic science minister James Embleton, the eco-housing project owner, despite his belligerent father's discomfort. New construction site evidence leads Jack to builder Brian Blackburn, with suspicion falling on his son, who has sudden behavioural problems. And as Leo's investigation into a health hazard hits another barrier, he becomes convinced he is onto a cover up.

Whilst Nikki and Jack close the net on Brian Blackburn's troubled son for murdering his co-worker at the eco-housing project, Leo finally finds someone willing to confirm his fear about the mysterious local health hazard. But when his would-be-informant is found murdered, Leo is convinced he was the victim of a government conspiracy to conceal the truth. And during his dogged efforts to expose the cause of the health hazard, Leo begins to suspect that Nikki's new man, science minister James Embleton, and his belligerent father, may be linked to a ruthless plot to silence him, which leaves Leo battling alone to seek justice and save future lives.

British Army Corporal Scott Lambert requests Leo's expertise in identifying human remains unearthed in Afghanistan, believed to be those of his brother Daniel, who went missing in action five years ago, suspected of being captured by the Taliban. Anxious Leo, Nikki and Jack head for the war-torn country in search of the truth about the soldier's mysterious disappearance.

Staying in a compound by a small town with ex-military security officer Sean Nugent and his detail, the team discovers that there is far more at stake than simply identifying a soldier's remains. The crime scene is preventing the completion of a vital charity water sanitation plant project, spearheaded by inspirational Afghan charity worker Fawzia Joya. And although initially understanding of the team's mission, when ruthless Taliban attacks begin to threaten their investigation, she fears the construction delay will jeopardise the project's completion, putting thousands of Afghan lives at risk from contaminated water.

Nikki, Jack and Leo struggle to identify the human remains with only sections of skeleton found and basic forensic facilities, but believe Dan Lambert must have been captured by the Taliban, executed and buried.

Whilst Leo grows closer to charity worker Fawzia, Nikki and Jack find and assemble the skull fragments and make an unnerving discovery that challenges their theory of what happened to Dan Lambert.

However, when an imprisoned Taliban fighter is found dead in the compound, the team suspect he was murdered, and suspicions grow about Sean Nugent and his men's treatment of prisoners. No longer able to trust anyone, the increasingly isolated team doggedly piece together the circumstances surrounding Dan Lambert's disappearance, but the shocking truth triggers a chain of events which leaves everyone's lives in danger.

Top-flight footballer Isaac Dreyfus' days at the top are numbered when a sex tape links him to the brutal murder of a young woman, threatening to destroy his reputation and marriage. Nikki struggles to come to terms with Leo's death following the arrival of the new Lyell Centre boss, pathologist Thomas Chamberlain. However, her feelings surface when DI John Leighton and DS Anne Burchett demand results in two unsolved cases - a mother and son murdered in their wealthy London home and the disfigured body of a young woman.

Footballer Isaac Dreyfus desperately fights to prove his innocence, whilst disillusioned Adam Freedman turns to a mysterious source for help to avenge the murder of his wife and child. Under scrutiny from the press, the police are determined to nail their prime suspect and pile pressure on The Lyell Centre to deliver results. However, when Nikki questions the motive behind the murders, a re-examination of the Freedman crime scene leads Jack to make a startling discovery.

Nikki delivers ground-breaking testimony in the high-profile appeal court case of David Bennetto, a convicted killer who has spent the last six years behind bars for the murder of two gay teenagers. But bitter DI Rachel Klein remains unconvinced that she caused a miscarriage of justice and cannot hide her contempt, especially when another young man is found dead bearing the same hallmarks of the previous murders. Meanwhile, Nikki's professionalism is brought into question due to her increasingly close relationship with lawyer Greg Walker.

Nikki's professional reputation is on the line when her romantic involvement with lawyer Greg Walker leads her face-to-face with a raging Bennetto. Thomas is under mounting pressure from DI Rachel Klein and the Home Office as he battles to save the Lyell Centre's reputation in the midst of a media storm.

Grieving for the death of his murdered son, newspaper hack Peter Masham strikes an unlikely deal with Bennetto's brother-in-law. Meanwhile, Jack and Clarissa uncover the true identity of murder victim Byron Lee.

Nikki and Jack head to Scotland to help earnest rural detective DS Jason Ross investigate the chilling murder of a lap dancer found in a remote forest. In their search to find a suspect, the team clash with rogue city detectives DS Mike MacNeil and DI Simon Laing. But as more human remains are unearthed in the forest, it becomes horrifyingly apparent that a dangerous serial killer is at large. News of the murders unsettles new mother Sarah, who is harbouring a dark secret from her partner Steve.

Nikki, Jack and DS Ross find themselves under pressure to urgently close the net on a serial killer abducting young women. Concerns grow over missing Sarah, and solving her mysterious disappearance becomes an urgent priority for Nikki and Jack. Local huntsman Niall Wallace makes a surprising admission under questioning from DS MacNeil. However, Nikki's confidence in the detectives is diminished when she suspects a cover-up in the past case of a murdered prostitute and her pimp.

When the body of a pregnant Northern Irish girl is discovered, the team face the urgent task of finding the baby snatched from her womb. The child's father, married man Simon, is the prime suspect in DS Sally Kirchner's eyes.

Meanwhile, Thomas uncovers the teenage girl's connections to a criminal underworld. Nikki and Jack encounter her addict boyfriend Nuri and ruthless drug dealer Bekir, suspected of masterminding the killing of a Drugs Squad cop. The dead detective's partner, DI John Brooke, is out to avenge his colleague's murder.

Martin, the sole eyewitness in the murder case, is found dead in suspicious circumstances. Threatened by an angry Bekir, Nuri grows increasingly desperate to find the missing drugs, with tragic consequences. Nikki helps grieving William come to terms with his daughter Alice's death and his missing baby granddaughter.

Under pressure from his wife Ellie, DI John Brooke finally comes face-to-face with his nemesis, drug dealer Bekir. However, Jack's growing frustration over DI Brooke's meddling in the case unearths a new line of enquiry.

Following the shocking discovery of a 15-year-old girl's body, DI Dale Carter fixates on his prime murder suspect, Ryan Kelvin. However, Jack's personal connection to Ryan presents a conflict of interests, leading Thomas to replace him on the case with forensic scientist Helen Ferguson. But in his quest for the truth, Jack is instinctively drawn into the investigation, alienating him from Nikki and the team. Hannah, the distraught best friend of the victim, becomes consumed with grief and guilt over the murder, leading her to take drastic action.

Jack's world is blown apart by the discovery of Hannah's dead body. Nikki uncovers the truth behind Jack and Ryan's strained relationship, but Jack's attempts to find evidence put his job at risk. While an angry Thomas wrestles with hiring forensic scientist Helen as Jack's permanent replacement, Dr Christy Nash fears for his marriage and business when DI Carter learns of his relationship with 15-year-old Katie. As Jack's suspicion of Ryan grows, his lone investigation puts him in grave danger and life will never be the same again.

DCI Jane De Freitas's personal fallout with boss and partner chief superintendent Robert Drake is the least of her worries when three people are shot dead in a petrol station. Nikki and Jack conclude that it is the work of a concealed shooter from long range. A sniper is at large in London. They combine ballistics and wound pathology, along with DCI De Freitas's expertise in victim and killer profiling, to narrow down the suspects. De Freitas contains her undercurrent of animosity towards Drake, as the team work to find the killer apparently striking at random.

The sniper plays a macabre game of cat and mouse with police, while Jack forms a friendship with the teenage son of one of the victims, offering sympathy and support. Thomas tries to ensure the safety of his daughter Rosie and estranged wife Julia amidst growing public fear, while fighting his urge to interfere in their lives.

Nikki and Jack look closer at the targets to elucidate the hidden motive of the killer. The investigation is scaled up by DCI Jane De Freitas, but it's Jack's shocking discovery at one of the victims' homes that leads the team to the perpetrator.

Nikki and Jack investigate a man run down and killed by a tube train. When a female vicar is then murdered after being followed on the underground, the team face the difficult prospect of building a case against her distraught husband.

Nikki forms a bond with high-flying DI Luke Nelson, impressed by his intelligence and compassion. He asks her to help re-evaluate the details of his father's murder when he was a child.

When a young roofer is stalked and brutally killed on his journey home, Nelson and the Lyell team identify a suspect on the tube cameras who links the murders, and a full-scale manhunt is launched.

Tension on the tube network threatens to boil over, and security is stepped up. The accidental verdict in the first death is called into question and the witnesses are brought in for interview. Amongst them is Lana Sutherland, a young hotel worker who has taken in a homeless man, Owen. DI Nelson lets Lana slip through the net before he realises she may be harbouring a dangerous killer.

Nikki helps Nelson unearth the mystery of his father's death, allowing him to confront and resolve the childhood memories that haunt him. He refocuses on the case and, with Jack and Nikki, discovers the missing key that links the victims.

When suspected paedophile Dale Barge is found murdered in a children's playground, Nikki and Jack are brought in by inexperienced detective Rory Drennan. It's not long before the team link Barge's death to a missing child, Lizzie Craddock.

Jack teams up with hard-nosed child protection DI Gina Conroy. They put pressure on Lizzie's parents Johnnie and Cheryl to try to find her. Lizzie's social worker Louise is brought in to help, and Nikki encourages her to stay positive when she blames herself for Lizzie's disappearance.

Daniel Garvey is found dead in his car. Social worker Louise fears that he may have been killed by his 16-year-old stepson Kevin, who has just come out of care.

Nikki, Jack and Thomas focus in on Lizzie Craddock's movements on the night of Barge's murder. Jack and DI Gina Conroy discover Lizzie's last known location but fear what they may find there.

Louise comes under further pressure when she is forced to make a call on whether a sick child, Ricky Mansfield, is being abused by his parents.

A shootout at a City hotel leaves young Ukrainian nanny Sofia Teplov dead, along with an unknown hitman. The Russian oligarch target Maksim Bazhanov narrowly escapes. Nikki and Jack work with young City DI Sarah Parks to ascertain the identity of the dead hitman and find out who is trying to kill Bazhanov and why.

Jack is drawn to Sarah, impressed by her ability to juggle work and family when he finds out her daughter has a rare childhood cancer. The discovery of the hitmen's identities as ex-army frustrates the team when they realise they could have been hired by any number of paymasters.

A young woman working for the Doshi property moguls, Amy Greenwood, is found dead in Maksim Bazhanov's apartment. Maksim is discovered to have been in a relationship with Yasmin Doshi. Nikki, Jack and Thomas ingeniously prove that foul play was involved in Amy's death and help the police find the missing Bazhanov.

Amy's mother Justine is a powerful player in the City Assembly and, fuelled by the death of her daughter, she puts pressure on DI Sarah Parks's investigation. Suspicion soon falls on Adam Lansley of FreeLondon, a violent activist known to target the super-rich. But Maksim is a powerful man with many enemies, and the team find one of them where they least expect it.

Rising star of the police, Sergeant Sam Honeywell, is found beaten and shot in his burnt-out car in Essex. The police are up in arms in what is a hugely emotive and political case for them, and DCI Jim Sullivan is determined to nail Honeywell's killer. But when local drug dealer and son of known crime boss Dean Fallon seems to have his alibi sewn up, suspicion shifts closer to home. Honeywell is discovered to have been in an affair with Kate Parry, wife of his best friend, Sergeant Carl Parry. It looks bad for Parry, and Jack reveals details of Honeywell's final moments, which hits Sullivan hard - he had been like a father to the murdered cop.

Known Essex criminal Jason Simons is found murdered in too similar a way to Honeywell to be a coincidence - beaten, shot and dumped. But as anomalies in his post mortem start to stack up, it is discovered that Simons was not what he seems.

The team find traces of drugs on Simons's penknife that point to a major importation, but his bereaved girlfriend Tess does not seem to know anything about it. Suspicion turns back to Dean Fallon, but a discovery in his medical records and the death of the Fallon family lawyer, Ben Osrin, takes the investigation in an unexpected new direction.

Nikki questions her judgement of a case in the past when she investigates the apparent suicide of a DJ. She brings what she thinks was her mistake to the attention of her colleagues, with repercussions sure to be felt amongst the deceased family members. Scott also reappears in Nikki's life, making her suspicious with everything that is going on at work.

A senior pathologist that Nikki had come to blows with is murdered and Nikki is prime suspect. The team fight to clear Nikki's name, as she suspects someone is trying to frame her. Tony learns of the pathologists death and fears that his son may be involved. Nikki is released from custody and grows ever more suspicious of Scott.

The Lyell team question who would kill a peaceful but outspoken anti-fundamentalist Muslim. DI Nina Ryman joins the team to investigate with suspicions that a member of the English Defense League is involved, however a shocking fact about correspondance the man had before his death, throws the case into chaos.

Thomas puts his personal feelings to aside, as the team have to track the extremists before they strike again. It soon becomes clear that Ryman has been shot by someone else who perhaps isn't dead after all.

A ex-convict is found brutally murdered in their home, leaving the team and forensic psychologist Sasha Blackburn to try and work out who has committed the crime. Sasha has a link to a possible suspect, Paul Raynott, however as the case continues more and more of the men who Sasha works with are drawn into the case.

The team discover that Paul may not be who he actually says he is and they then discover he has been involved in a murder case before now. A revisit to the victims of Paul's first murder victim's family reopens old wounds, as more and more victims come to light. The last link in the chain may be in Sasha's hands, but is she too close to her clients to help solve the case.

A Polish teenager becomes the victim in an armed police operation, putting the department under severe scrutiny. Soon after the inquest delivers a lawful killing verdict, the body of a mutilated Turkish man turns up near the scene of the first shooting. Vicky Sharpe has to question whether the two killings are linked and approaches Lyell to seek help in sorting through the evidence. More bodies are discovered as the investigation continues and the team get drawn into the world of Turkish gangsters.

The body of an armed police officer is found as the investigation continues. The team join the manhunt for a supposed cop killer named Bruno. Jack hopes to reach the killer first and believes he can talk him into handing himself in, before more murders are committed. As he continues his own investigation, he soon uncovers links to the gun trade in London. The other armed police officers are questioning their safety after the murder and it soon becomes apparent that the killer is very highly trained, putting more pressure on Jack and the links he has uncovered.

The Lyell team investigate the clinical shooting of a mother, stepfather and son by the River Malt, to determine who killed this picnicking family and why. The investigation soon turns to the female victim's estranged husband. The couple were in the middle of a bitter and acrimonious divorce, and records kept by the deceased show that the husband has a propensity for violence.
Working on the case is local detective Malcolm Guillam, about to retire and haunted by the death of a young woman near the River Malt ten years ago. When the present day murder brings back memories of the unsolved case, Guillam sees an opportunity to redeem himself. But leading the investigation is DCI Butcher, who is certain the estranged husband is responsible for the murder, and has little time for Guillam's perceived trip down memory lane.
Meanwhile, registrar Amy is advancing in her surgical career when news of the River Malt shooting brings back memories of the same incident that haunts DS Guillam. Attempting to bury her past, Amy is unwillingly pulled back into the same world that caused the death of her friend ten years ago and forced to confront the high-powered people she has been trying desperately to forget.

As DCI Butcher moves closer to charging the estranged husband of the family killed at the picnic, Jack and Nikki join DS Guillam in search of the truth. The team begin to realise they may have been looking down the wrong end of the telescope, and their lives are thrown into mortal danger. Soon enough, they are thrust into an unexpected and depraved world, and further murders are discovered. Jack and Nikki must fight to escape and bring those responsible to justice.
Meanwhile, Amy's dark past begins to catch up with her and she must decide whether to keep it buried or confront it head-on, risking her medical career and everything else in order to escape her demons. Amy's nightmare and the Lyell's investigation begin to converge. And when the crimes are linked to people in very high places, the team experience the difficulty of bringing the rich and powerful to justice.

When a people smuggler is found dead in the City, Nikki must delve into London's illegal immigrant community. She meets a vulnerable Syrian teen called Akka who is in need of help, putting Nikki in a moral dilemma - and the killer is still on the loose.

Breaking into the van, Jack and Nikki are met by a horrifying sight, as Nikki realises that Akka's mother is among the dead.

Meanwhile, Sosa's van is arriving into Dover Ferry Port. The illegal passengers are nearly caught when Border Force officers ask to inspect the van, but a corrupt official overrules his employees and wave the van through.

Following the trail of messages between the gang members, Yusuf realises that another of his smuggling partners, Abdul Wilson, has been using the system to extort money from the desperate family members of the migrants, and then leaving the migrants to die after their arrival in England.

With Sosa in another white van, is her life in danger?

It's a sunny May bank holiday and the newspapers are abuzz with the news of the disappearance of a young schoolteacher.

Investigating officer DCI Andy Steemson asks Nikki and Jack to examine the small blood traces, bike tracks and a charred cake in the oven in the house. This was no planned disappearance.

Meanwhile, Thomas is called to the site of the murder of an ex-junkie and a petty criminal with the opposite circumstances. The body has been thrown from the top of a flyover and DS Maureen Steele, a police officer with a drink problem, has been given the case. Bumping up against Steele's dismissive attitude, Thomas becomes determined to win justice for the victim - and ultimately forms an unlikely alliance.

However when a body is found in a pond off the M25, Nikki and Jack make the discovery that the deaths are linked. But what is the link between these two disparate cases?

In order to discover the truth between these two cases, Nikki visits disgraced pathologist Mike Liston, convicted of falsifying pathology reports, to find the truth about a cold case that holds the key to the mystery in the form of a 20 year-old DNA profile…

A woman's body found floating in the Thames leads Nikki and Jack to a riverside community scarred by grief after the disappearance of a teenage girl three years ago.

After bereaved mother Ali attacks suspect Aaron, Nikki is under fire for leaking information. Jack and Thomas must bridge internal divisions to track down the killer.

Father and son Bill and Frankie McAteer are killed in a horrific car accident on their way home from work at Billingsgate Market. Nikki and Jack arrive at the scene of the crash to meet DS Jodie Tanner, and to discover Frankie's body still in the car but riddled with bullets. Whoever was driving the SUV had a gun.

Back at the Lyell centre, Nikki's post mortem examinations suggest that Frankie was the target, rather than Bill. Clarissa and Max discover a deleted video on a mobile phone showing a sexual encounter between Frankie, his girlfriend Becky and best friend Liam, which was posted on a revenge porn website. However when Liam is also killed, the video becomes the key to the killings.

When Nikki and Tanner visit Becky, her flatmate Paul enters and she bursts into tears about the murder. But Paul looks like he has worries of his own…

Meanwhile, Clarissa's husband Max is an expert in the fast-developing field of digital forensics and lends some equipment to help crack Frankie's seemingly-empty phone, his arrival causing an icy reaction from both Thomas and Jack.

Examining the contents of Liam's phone, Clarissa has found a longer version of the video and sees a flash of Paul's face as he peers from the stairs. Retrieving Paul's laptop, Clarissa takes it to Max's lab and finds reams of communication between Paul and another person, under pseudonyms, which starts to unravel the mystery of the Billingsgate killings.

Meanwhile, Clarissa is amused to see Thomas' nose put out of joint and Jack soon feels paranoid that Max is poaching Clarissa for his own lab. Will Clarissa remain with the Lyell team?

Nikki travels to Mexico to attend the funeral of Luisa, a former intern at the Lyell Centre who was murdered in a carjacking in her native country. Nikki soon stumbles across the post mortem report and realises that the body is not Luisa's. There's been some kind of mistake - or is this something more sinister?

Assisted by Dr Eva Vasquez and fired up with the idea that Luisa might still be alive, Nikki and Jack trace her last known movements and are led to a farm where a cartel massacre was carried out, where they start to perform makeshift post-mortem examinations.

By now, Nikki and Jack are gaining the wrong kind of attention. And when Nikki goes missing, Jack is forced to make decisions that will end in life or death…

A frantic Jack carries out forensic examinations on the spot where Nikki disappeared. With Thomas at the airport ready to come out and help, but still 24 hours away and no leads left to follow, Jack receives a text message containing a mysterious phone number.However when Jack calls through, expecting to hear from Nikki's captors, he is shocked at who answers the phone. Can Jack save Nikki?

Haunted by her experiences in Mexico, Nikki Alexander is struggling to come to terms with life back home.

Whilst on leave she seeks out fellow pathologist Sally Vaughan (Emma Fielding) for support. However, a few days later and troubled by the failure of Sally to return her calls, Nikki heads to her house only to find that it has become a crime scene and Sally is nowhere to be found.

Nikki's suspicions over David Cannon are further aroused when she discovers blood in the boot of his car. With Thomas' support she takes samples to test for DNA. Does it belong to Sally Vaughn?

Nikki and Jack deal with their feelings post Mexico in very different ways.

Jack is boxing with his sparring partner, DCI Naomi Silva when he is called to a crime scene.

While Nikki is busy examining the body of a young woman Karen Sawyers, Jack is surprised to find the SIO on the case is Naomi Silva.

The first prime suspect, Karen's husband Pete, is found covered in blood and clearly suffering. The forensic evidence leads the team to a cosmetic clinic, where a pregnant Karen had been receiving various treatments seemingly free of charge.

Nikki and Silva soon become frustrated when Simon Laing, the CEO of Hamilton Ashe hospital, blocks their access to Karen's medical records. However, when a second body is found and all evidence leads back to Hamilton Ashe, Laing is forced to help the team.

Meanwhile, when Thomas's daughter Rosie unexpectedly turns up at the Lyell, Thomas has to deal with a more complex role... being a father.

Nikki comes face to face with CEO Simon Laing when it becomes apparent that the motive for the murders may have been blackmail.

When the team find that the hospital computer database has been hacked, Clarissa and Max follow the forensic clues to a teenage hacker called Splinter.

However the danger grows much closer to home when Nikki receives a threatening text with a picture of Thomas's daughter Rosie.

A US diplomat is shot dead in a central London square, forcing the team to work closely with the embassy and the FBI and to overcome jurisdictional hurdles.

Nikki is still in shock as the team arrive at Matt's residence but insists on working at the Lyell, determined to help. When analysing crime scene photos and the positions of the victims' bodies, Nikki realises there is a pattern. Together, the team uncover a secret that has been held by those at the very top of the US government.

While two care home staff are chasing Kevin McDowd, a young man with learning disabilities and sociopathic tendencies, Nikki and Jack examine a fatal road accident where the deceased is Kevin McDowd's mother. The investigation led by police sergeant Button should be straightforward, but the forensic evidence suggests foul play.

The team are determined to uncover the truth about unexplained deaths of patients at a care home. They are desperate to rescue Serena and return her to safety. Unbeknownst to her colleagues in the Lyell Centre, Clarissa allows herself to be admitted to the care home in order to investigate. Her determination to find out what happened leads her to uncover a shocking truth, but puts her life in danger.

It is Christmas morning and Nikki is awaiting a call from Matt who is back in the States. Instead, she receives a call to say that the team is needed: a family has been massacred at an enormous property owned by Andy McMorris, the CEO of a haulage company.

Greeted by SIO DI Gibbs, Nikki is first on the scene whilst Clarissa is connected to the action via screens and microphones back at the Lyell. Having left his father to celebrate Christmas without him, Jack is just arriving to join them when a gunshot suddenly rings out.

With Gibbs lying on the floor with a life-threatening injury, the team realise that the shooter might still be on the grounds. Are they also in danger?

As the truth behind the McMorris family is revealed, the team is brought together by the conclusion of a shocking Christmas family tragedy. Reuniting with their respective families, Nikki finds her secret Santa gift is a visit from a loved one.

Fresh from her trip to the States, Nikki and the Lyell unit are called in to investigate an attack against a trans man. When two further attacks are reported, one leaving a potential witness, it becomes clear that the team is facing an outbreak of violence against the trans community.

With the Lyell under increasing financial scrutiny and frustration growing between the team and the acting DCI, can they pull it together to find the killer before they strike again?

A slip-up from DCI Cramer results in the premature release of a suspect - and when his mistake becomes evident in the light of incriminating evidence, he tries to blame the Lyell for the oversight. With the team under increasing scrutiny, Thomas offers to bear the brunt of the pressure while the team focus on the search for the perpetrator.

When his career in the field is threatened, will Thomas leave the Lyell to save his team?

After a teenage boy dies in a meth lab explosion, his inspirational head-teacher, Noah Taylor, resolves to confront the drug dealers preying on his community. Dangerous batches of new drugs are hitting the streets and its down to Nikki, Jack, Clarissa and Thomas to deal with the consequent rise in overdoses. When tragedy strikes at the heart of the Taylor family, it puts Noah on a collision course with the criminals behind the drugs.

When tragedy strikes at the heart of the Taylor family, it puts Noah on a collision course with the criminals behind the drugs. Meanwhile, one of the team's life is endangered when they become the victim of a knife attack.

A collection of dismembered body parts, covered in intricate Japanese tattoos, have been found in a Brighton waste dump. The team are called in to painstakingly piece them together and they search for clues to lead them to the killer. Outside of the lab, Nikki has some news she desperately wants to share with Matt.

The team struggle to find the final piece of the puzzle left behind by the murders in Brighton. At home, Nikki and Matt discuss their future together.

A car-bomb attack in a quiet suburban street brings back unwelcome memories for Jack, when evidence points to the involvement of a Northern Irish terror group, long thought inactive. As the family of the victim seek their own form of justice, Jack calls an old friend to help them find those responsible and stop the act of revenge from escalating.

During the team's search for the killer, Jack works alongside an old friend from Northern Ireland, a fearless journalist who has dedicated her life to exposing the suspected organisation. As the team investigate further, they realise they have uncovered a complex conflict sustained by ties of loyalty, family and retribution.

Nikki is humiliated in court when a barrister accuses her of making a serious error in the case of a policeman who may or may not have been murdered.

Meanwhile the team investigates the death of a medical researcher found in a canal with mysterious puncture marks on his body.

When Thomas sides against her findings on a controversial case, Nikki suspects foul play and takes steps to prove her theory. Jack and Clarissa follow a forensic trail connecting a dead researcher with a billionaire scientist and a secret testing programme.

The team find unexpected connections between the death of a former US ambassador in a plane crash and the apparent suicide of a successful businessman.

The team discover a connection between the plane crash and a sinister online forum. Meanwhile, Matt is grieving for his friend, putting his relationship with Nikki under strain.

When the body of a missing teenager is found in a field near his village, Nikki and the Lyell team must determine whether the killer is a stranger or a local.

Investigating the murder of missing teenager Jason Forbes, Nikki and the Lyell team are pressured by police officers who are keen to secure a conviction.

The body of a woman is found on railway tracks in London, badly damaged from electrical burns. On the mortuary slab, the woman's recent and historic injuries suggest years of abuse, likely within the home. It's a difficult post-mortem for Nikki, as she is troubled by memories from her childhood.

When the team's search for Jenny's killer hits a wall, her friends at the women's refuge seek answers. Meanwhile, Thomas makes some friends in high places.

When a skeleton is found in concrete, the Lyell team must investigate a suspicious death dating back 20 years.

The team's investigation leads them to a mysterious cryogenics facility and the discovery of another suspicious death.

Thomas performs a post-mortem on a soldier who died in military training. His investigation takes a turn when he discovers traces of a possible nerve agent.

Jack is rushed to hospital after collapsing at the scene of a car crash. Following Thomas's discovery that soldier John Sealy may have been exposed to a nerve agent, is it possible someone is targeting the victim's family? With Jack's life in the balance, it's down to Nikki, Thomas and Clarissa to find the truth and save their friend.

While investigating a suspicious death in a prison, Nikki focuses her attention on the victim's cellmate, a dangerous criminal from her past.

As the team investigate a second death, Nikki's theory starts to fall apart. Can she put her fixation with Scott aside and find the killer?

In the first case for new recruit Adam, the murder of a swimming instructor leads the team to suspect her ex-boyfriend, a former cop. Meanwhile, Jack has an unexpected visitor.

Having traced Laura's last movements to a suburban house, the team work to identify the bodies buried in the garden. Meanwhile, Jack must choose between his brother and the truth.

Nikki, Jack and Adam are brought in to investigate the murder of a surgeon in a hospital. DNA evidence suggests the impossible when it implicates a patient who was under the anaesthetic at the time of the killing. Meanwhile Adam's friendship with the hospital director brings his impartiality into question.

With their suspect in a coma, and an attacker seemingly at large in the hospital, Nikki calls on Adam's expertise to help solve the case. Together the team make a breakthrough that hints at a medical conspiracy and exposes the lengths some are willing to go to protect their personal and professional reputations.

The murder of a promising boxer draws Nikki and Jack into the world of underground boxing. Meanwhile, Jack's brother Ryan is released from prison and comes to live with Jack and Conor, leaving Jack struggling to maintain peace with his brother and keeping the secret that he might be Cara's father. When Jack and Nikki's investigation hits something of a brick wall, they are introduced to forensic ecologist Simone. Her unique skills and lively personality prove to be exactly what the Lyell team need.

Jack, Nikki and Simone investigate another death connected to the underground boxing ring. Jack's loyalty is tested when he fears Ryan has put Cara in danger.

Nikki's students make an alarming discovery while dissecting a body donated for their training. The case that follows brings Nikki close to student Ollie, stirring dangerous feelings. Meanwhile, Jack and Simone investigate the care home where the victim died, but find themselves fighting to keep the residents alive when a diverted river floods the area.

Stranded in the flooded care home, Jack and Simone fight to keep the residents alive. Meanwhile, Nikki and Detective Galloway join the emergency relief effort and discover that Jack may be trapped with the killer. Shaken by events, and by Nikki's relationship with her student, Jack takes matters into his own hands.

In Liverpool, following the launch of Sam Ryan's new company, the health secretary is assassinated. Sam summons the Lyell team with a plea to help investigate, but Nikki is unsure whether she can trust Sam, who seems to know more than she's revealing. Meanwhile, Jack and Nikki navigate their feelings for each other.

DNA evidence linked to the Health Secretary's assassination forces Nikki to face her past in the present. As her investigation progresses, Nikki realises that its consequences will affect her, and her profession, forever.

When a woman confesses to murdering her husband, the Lyell team must determine if all is as it seems. Meanwhile, Simone is shocked to be reunited with a detective from her childhood, and struggles to untangle her past.

A secret from his father propels Jack to Belfast. Meanwhile, Simone and Nikki investigate the mystery of a burned body. As familial secrets come to the surface, Jack faces tragedy head on.

The death of an investigative journalist throws the spotlight onto Sam Ryan. Nikki begins to realise that the implications of her discoveries will challenge the principles of forensic science.

As the Lyell team focus their investigation, they bring peril upon themselves. With the world they hold dear teetering on a knife edge, they confront their threats to preserve the credibility of DNA.

When a man is thrown from a high-rise building, the team are propelled into the criminal underworld of a notorious mafia group, the Ndrangheta. Aided by the National Crime Agency, Nikki and her team set about uncovering the truth. As they descend deeper into the murky depths of the investigation, Nikki soon finds herself caught in the mafia's web, with deadly consequences.

Nikki becomes even more involved with the Ndrangheta mafia-group and Jack uncovers some disturbing leads. An unlikely alliance leads Nikki closer to the truth, but not without some collateral damage.

An abandoned lorry is found at a quarry with several dead and dying people in the back. Initially, it appears to be a classic sex trafficking story that Nikki and the police are all too familiar with, but it soon becomes clear that all is not as it seems. With the survivors refusing to speak, Nikki and the team must use their pathological and forensic skills to identify the deceased and piece together what happened.

The Lyell team work together to find out why the lorry was found with bodies inside and a dead driver at the wheel, and are truly shocked to discover where it leads them. Gabriel becomes emotionally invested and is presented with an ethical dilemma, and Jack gets a surprise visit.

The Lyell team are thrown into the dark side of social media, where nothing is as it seems, and the perfect profiles of the influencers they are investigating raise disturbing questions. As a heavily pregnant DI asks the team for their expertise, are they running out of time to solve this case?

The investigation continues to take unexpected turns, with Nikki managing to get behind the mask of the lead suspect. Jack has a breakthrough at the festival site and Nikki takes a dangerous opportunity. A surprise event at the Lyell brings some hope.

Levelling-up leaders and environmental activists clash in a small town trying to look to the future. With a sabotaged train and a dead mayor, the activists become suspects.

The Lyell team return to the crime scene as another victim is in peril. Family ties are tested to their limits as they reveal the dark secrets that led to the tunnel collapse, and Jack is put in a difficult position when a blast from the past comes to visit.

Jack comes to the aid of an old friend and is sucked into a difficult case where he's pitted against his former mentor. As Nikki and the team start to build a picture of what happened, they learn nothing is as it seems. Dealing with a family of serving police officers, they have to tread carefully as their relationships prove to be another obstacle to overcome.

As the evidence mounts against the accused police officer, the local CID finds dissent within their ranks. The Lyell team unveil corruption and deceit within the local jurisdiction, with deadly and wide-reaching consequences.

A new murder victim forces the team to consider whether a notorious serial killer has resurfaced after 20 years, or if they are dealing with a copycat. Nikki and Jack investigate a murder bearing all the hallmarks of a notorious serial killer. When Nikki meets Charles Beck, the pathologist who conducted the original post-mortems, she discovers his wife was the suspected fifth victim of the serial killer, but nobody believes him when he claims he knows where to find her body.

When a woman's body is removed from a reservoir, Nikki performs the post-mortem and confirms she is the deceased wife of pathologist Charles Beck. Jack and Velvy discover new evidence that leads to a surprising arrest as Nikki continues to seek the truth about notorious serial killer Calvin Dunn.

The team pieces together the mystery of a man found dead on the shore of the Thames, while the life of a disgruntled criminology professor begins to unravel. The team works on a suspected suicide, but the investigation raises more questions than it answers. Gabriel has an exciting new opportunity, both professionally and personally, and enlists Jack's help. When a disgruntled professor of criminology is passed over for promotion, events take a truly sinister turn and the interview panel begins to be targeted. Could a member of the Lyell be next?

Events continue to spiral at the university, and Cara becomes collateral damage. The riddle of the body in the Thames is solved. A breakthrough in the Cherry case is received from an unlikely source, but will the team get there before it is too late?

The team investigate the body of a woman found in a flat after being dead for a year. As they seek to find out the truth of her identity and what happened to her, they must draw on all their forensic and pathology knowledge to solve the case. Even if the world had forgotten her, the Lyell are determined she must get justice.

Nikki and Jack work to uncover the truth surrounding a death and consider if it's linked to their original body. Meanwhile, DI Torres searches for a stalker, and Cara is shocked at Velvy's living conditions. As the case comes to a head, there are surprises afoot for the team.

The team investigate the death of a Burmese man on a deserted beach, whose young pregnant wife desperately hopes is still alive. Nikki and Jack piece together the perplexing crime scene and find it poses more questions than it answers.

Nikki makes a breakthrough, but can the team believe everything they are told? The Lyell is compromised in an unexpected way as the team strive to find out who the man on the beach was and why he was killed. In a dark and chilling story, they must unite to discover the truth and, above all, trust no-one.

The Lyell are called to King's Cross Station Museum, where they discover the bodies of eight victims entombed below. With the knowledge that a prolific serial killer was operating in London nearly 20 years ago, Nikki and the team know this will be a case like no other.

Nikki continues to try to identify the last of the remaining bodies, in an effort to uncover any connections and find a motive, while Jack and the police begin to look into several two-decade-old missing-persons cases in the hope that they might reveal the identity of the man dubbed ‘The King's Cross Serial Killer'.