Season 1
Episode: 1x01 | Airdate: Oct 19, 1997 (120 min)
When five-year-old Julie Harris goes missing from the playground of a public housing project in East London, the police launch a desperate search that brings results too late. DS Michael Walker joins DI Pat North in the subsequent murder investigation. They target Michael Dunn, a disheveled, unemployed alcoholic who lives in a squalid flat in the neighborhood. Although circumstantial evidence against Dunn mounts, the police still lack a crucial link between him and the crime even as the case nears trial. (Part 1 of 2)
Episode: 1x02 | Airdate: Oct 20, 1997 (120 min)
When five-year-old Julie Harris goes missing from the playground of a public housing project in East London, the police launch a desperate search that brings results too late. DS Michael Walker joins DI Pat North in the subsequent murder investigation. They target Michael Dunn, a disheveled, unemployed alcoholic who lives in a squalid flat in the neighborhood. Although circumstantial evidence against Dunn mounts, the police still lack a crucial link between him and the crime even as the case nears trial. (Part 2 of 2)
Season 2
Episode: 2x01 | Airdate: Oct 18, 1998 (120 min)
After a prostitute's tortured, mutilated body turns up on a garbage heap, DS Michael Walker and DI Pat North know they face an exceptionally sadistic psychopath. Two other women soon suffer similar attacks, and one miraculously survives. Struggling bravely, she leads police to Damon Morton, owner of an electronics repair business. But three of Morton's employees confess to the crimes and seem intent on protecting him, even if it means going to prison. What mysterious hold does Morton have on these men? And can it survive at trial? (Part 1 of 2)
Episode: 2x02 | Airdate: Oct 19, 1998 (120 min)
After a prostitute's tortured, mutilated body turns up on a garbage heap, DS Michael Walker and DI Pat North know they face an exceptionally sadistic psychopath. Two other women soon suffer similar attacks, and one miraculously survives. Struggling bravely, she leads police to Damon Morton, owner of an electronics repair business. But three of Morton's employees confess to the crimes and seem intent on protecting him, even if it means going to prison. What mysterious hold does Morton have on these men? And can it survive at trial? (Part 2 of 2)
Season 3
Episode: 3x01 | Airdate: Oct 7, 1999 (120 min)
Petite, 15-year-old Cassie Booth vanishes in the midst of her newspaper delivery route. DS Michael Walker's hopes of finding her alive fade when an anonymous tip leads to grisly clues and eventually to a suspect. Meanwhile, DI Pat North - now working on the vice squad and living with Walker - responds to a complaint from wealthy businessman Stephen Warrington, whose pursuit of her turns increasingly persistent and sinister. After North uncovers links between her stalker and Cassie's kidnapping, two men go to trial, each pointing an accusing finger at the other. (Part 1 of 2)
Episode: 3x02 | Airdate: Oct 14, 1999 (120 min)
Petite, 15-year-old Cassie Booth vanishes in the midst of her newspaper delivery route. DS Michael Walker's hopes of finding her alive fade when an anonymous tip leads to grisly clues and eventually to a suspect. Meanwhile, DI Pat North - now working on the vice squad and living with Walker - responds to a complaint from wealthy businessman Stephen Warrington, whose pursuit of her turns increasingly persistent and sinister. After North uncovers links between her stalker and Cassie's kidnapping, two men go to trial, each pointing an accusing finger at the other. (Part 2 of 2)
Season 4
Episode: 4x01 | Airdate: Oct 4, 2000 (120 min)
DI Pat North joins a team reopening an eight-year-old case involving James McCready, convicted of murdering his live-in partner. Citing new evidence, barrister and MP candidate Robert Rylands wants to overturn McCready's conviction as a gay rights issue and stir up media interest to his political advantage. Personal and professional pressures mount when North uncovers irregularities involving her lover, DS Michael Walker, who led the original McCready investigation. Suspended from duty, Walker sets off to save his relationship, clear his reputation, and keep the convicted killer behind bars. (Part 1 of 2)
Episode: 4x02 | Airdate: Oct 5, 2000 (120 min)
DI Pat North joins a team reopening an eight-year-old case involving James McCready, convicted of murdering his live-in partner. Citing new evidence, barrister and MP candidate Robert Rylands wants to overturn McCready's conviction as a gay rights issue and stir up media interest to his political advantage. Personal and professional pressures mount when North uncovers irregularities involving her lover, DS Michael Walker, who led the original McCready investigation. Suspended from duty, Walker sets off to save his relationship, clear his reputation, and keep the convicted killer behind bars. (Part 2 of 2)
Season 5
Episode: 5x01 | Airdate: Jun 19, 2001 (120 min)
Detective Superintendent Michael Walker (David Hayman) is assigned to head up a murder investigation after a skeleton is discovered during the demolition of a derelict north London house.
Episode: 5x02 | Airdate: Jun 20, 2001 (120 min)
Skeletons keep turning up at 34 Hallerton Road in North London. The bones belong to three young woman killed more than 17 years earlier, when a respectable, church-going family ran a bed-and-breakfast there.
Season 6
Episode: 6x01 | Airdate: Oct 6, 2002 (120 min)
Back on the murder squad, Pat is asked to investigate when a young mother of two, Diane Leach, is abducted from a local wood. The confession of a local sex offender complicates matters, as Pat looks into the possibility that the father of a young protege of the woman may be responsible for her disappearance. Meanwhile, Walker has worries of his own, as his ex-wife Lynn is dating an abusive, unstable man, who turns into a manic-obsessive when she decides to leave him. (Part 1 of 2)
Episode: 6x02 | Airdate: Oct 7, 2002 (120 min)
Back on the murder squad, Pat is asked to investigate when a young mother of two, Diane Leach, is abducted from a local wood. The confession of a local sex offender complicates matters, as Pat looks into the possibility that the father of a young protege of the woman may be responsible for her disappearance. Meanwhile, Walker has worries of his own, as his ex-wife Lynn is dating an abusive, unstable man, who turns into a manic-obsessive when she decides to leave him.(Part 2 of 2)
Season 7
Episode: 7x01 | Airdate: Sep 1, 2003 (120 min)
Suspicion (Part 1): Back in uniform and stuck at a desk job, DCS Michael Walker looks into the disappearance of Diane Harwood, the daughter of the judge who presided over his murder trial. Professional tensions increase when Walker's ambitious, hostile former subordinate, DCI Roisin Connor, sets up shop in Walker's station to investigate a woman's severed hand found on a nearby riverbank.
Episode: 7x02 | Airdate: Sep 2, 2003 (120 min)
Suspicion (Part 2): The two investigations converge, and Walker sees the opportunity to get his career back on track-if he can convict Diane's murderer, whom Walker believes is feigning psychosis.
Season 8
Episode: 8x01 | Airdate: Oct 11, 2004 (90 min)
Blue Eiderdown (Part 1): A beautiful young woman falls from a luxury high-rise onto the hood of a car, sparking an inquiry into a private sex club that caters to wealthy, powerful men.
Episode: 8x02 | Airdate: Oct 12, 2004 (90 min)
Blue Eiderdown (Part 2): While Walker becomes romantically involved with an informant, Connor goes undercover at the sex club to ferret out the killer.
Season 9
Episode: 9x01 | Airdate: Nov 7, 2005 (90 min)
The Lovers (Part 1): On honeymoon in London, a man goes out for coffee and disappears from busy Covent Garden. Convinced that officials aren't taking the case seriously, his distraught bride searches the streets herself and pleads for help through the media. Meanwhile, her wealthy, well-connected father pressures DS Michael Walker for results.
Episode: 9x02 | Airdate: Nov 8, 2005 (90 min)
The Lovers (Part 2): A suspect in the disappearance case is brought to trial. Will DCS Michael Walker be able to prove his guilt before it's too late?
Season 10
Episode: 10x01 | Airdate: Jan 14, 2007 (90 min)
Sins of the Father (Part 1): Emily Harrogate seems to have it all: beauty, brains, athletic talent, and a loving family. But when the teenager dies from a fall down the stairs, it looks like murder. DCI Connor begins to reveal cracks in the Harrogates' happy-family facade.
Episode: 10x02 | Airdate: Jan 15, 2007 (90 min)
Sins of the Father (Part 2): Although Connor remains suspicious of the family, the investigation focuses on Emily's secret boyfriend, apprentice electrician Michael Summerby-who adamantly professes his innocence.
Episode: 10x03 | Airdate: Jan 21, 2007 (90 min)
Closure (Part 1): After two months investigating the brutal rape and murder of a schoolgirl, DCI Connor has no leads, no DNA evidence, and one highly unreliable witness. A review of similar unsolved cases suggests a serial killer at work.
Episode: 10x04 | Airdate: Jan 22, 2007 (90 min)
Closure (Part 2): Under relentless badgering from her boss, Connor enlists the help of a famous American profiler to get inside the mind of an elusive murderer. Will she find the killer despite Walker's doubt?
Episode: 10x05 | Airdate: Jan 28, 2007 (90 min)
Paradise Lost (Part 1): The brutal rape and murder of a young white teacher looks like an open-and-shut case. The victim's black boyfriend has a criminal record and a feeble alibi, and the forensic evidence seems damning. But has unconscious racism distorted Connor's view of the facts?
Episode: 10x06 | Airdate: Jan 29, 2007 (90 min)
Paradise Lost (Part 2): With accusations poisoning the atmosphere, Connor and her colleagues must find the killer in a community increasingly hostile to the police.
Episode: 10x07 | Airdate: Feb 4, 2007 (90 min)
Curriculum Vitae (Part 1): Harried single mom Suzy MacDonald returns home from a business trip to find her precious 18-month-old daughter dead in her crib.
Episode: 10x08 | Airdate: Feb 5, 2007 (90 min)
With Leanne on the run, and having used a fake CV to obtain her job in the first place, it seems an obvious conclusion that she is responsible for Poppy's death. However, when the trail leads to a second baby's death from two years previously, Walker believes he has a serial killer on his hands.
Episode: 10x09 | Airdate: Feb 12, 2007 (90 min)
A small fortune in missing jewels at a murder scene suggests a botched burglary. The victims' wealth and status--a police commander and his magistrate wife--put added pressure on Walker and Connor to find the perpetrator, fast.
Episode: 10x10 | Airdate: Feb 13, 2007 (90 min)
Mirror Image (Part 2): As the police probe the Delany family's unsavory secrets, Connor's suspicions fall on the couple's sons, despite their apparently airtight alibi.
Season 11
Episode: 11x01 | Airdate: Jan 17, 2008
Rules of the Game (Part 1): When high-priced call girl Sofia Petrenko is found nude and strangled inside a trunk at London's Heathrow Airport, DCS Mike Walker ignores diplomatic warnings and arrests the trunk's owner, Ukrainian billionaire Vitali Malikov.
Episode: 11x02 | Airdate: Jan 24, 2008
Rules of the Game (Part 2): DCI Roisin Connor doubts the Ukrainian's involvement in the crime, and steers the investigation in a new direction.
Episode: 11x03 | Airdate: Jan 31, 2008
Kill the King (Part 1): Walker's friend Dr. Jonathan Carlisle, a famous pediatric surgeon, is killed.
Episode: 11x04 | Airdate: Feb 7, 2008
Kill the King (Part 2): With no available suspects, the investigation delves more deeply into the victim's personal affairs.
Episode: 11x05 | Airdate: Feb 14, 2008
Conviction (Part 1): Ex-con Terry Dyer maintains his innocence even upon release, but the angry father of his alleged victim seeks revenge and wounds him.
Episode: 11x06 | Airdate: Feb 21, 2008
Conviction (Part 2): Dyer is implicated in another murder investigation by DS Satchell, muddying the waters of the reopened case against him.
Episode: 11x07 | Airdate: Feb 28, 2008
The Box (Part 1): On leave in Glasgow, Walker is drawn into the search for an old friend's missing sister.
Episode: 11x08 | Airdate: Mar 13, 2008
The Box (Part 2): The diary of one of the missing women indicates a new suspect in the case.
Episode: 11x09 | Airdate: Mar 20, 2008
Tracks (Part 1): The discovery of 19-year-old Maria Cole's mud-covered corpse sends Walker and Connor searching for answers. Armed with sparse evidence, the detective duo clashes with a key murder suspect's father who will take any means, legal or not, to keep his son free.
Episode: 11x10 | Airdate: Mar 27, 2008
Tracks (Part 2): It seems inevitable that Andy and Darren will be found guilty of murder, until all participants in the trial are profoundly affected by a single event. Walker must wade through the implications of the incident while also confronting a great struggle involving his own son.
Season 12
Episode: 12x01 | Airdate: Jan 9, 2009
Siren (Part 1): A car drives an ambulance off the road, killing Sebastian Cole, and wounding his famous fiance, Imogen Buller-Turi. The tabloid-covered murder becomes increasingly intricate as Walker and Connor explore its connection to international drug trafficking.
Episode: 12x02 | Airdate: Jan 16, 2009
Siren (Part 2): Walker forces DCI Connor to team up with McGill and his squad in the hopes of expediting the murder investigation. Connor's earlier mistake ratchets up the tension as the unit races to anticipate Imogen's actions.
Episode: 12x03 | Airdate: Jan 23, 2009
Ghost Train (Part 1): A teenager's fatal fall from a Ferris wheel initially seems to be an unfortunate accident. DCI Connor quickly realizes that to uncover the muddled truth behind the death, she must confront the carnival's mystic owners, including Satchel's fortune-telling aunt, Tess.
Episode: 12x04 | Airdate: Jan 16, 2009
Ghost Train (Part 2): The arrest of Pavel yields unsatisfactory results, forcing Walker and Connor to continue searching for the motives behind the growing number of crimes. As they do, the line between criminal and victim blurs.
Episode: 12x05 | Airdate: Feb 6, 2009
Shooter (Part 1): When a jewelry robbery goes awry, the notorious Bilkin family is put on trial for murder. After Satchel bungles his testimony, he must deal with Walker's frustration and the intense scrutiny placed on his personal life.
Episode: 12x06 | Airdate: Feb 13, 2009
Shooter (Part 2): Walker's obsession with Bilkin family irks Connor, who questions the purpose of the investigation. Jamie enlightens Connor with information about the romantic life of Barry Bilkin, intensifying speculation about the family and its emerging issues.