CSI: Crime Scene Investigation - Episode Guide

Gil Grissom is the supervisor of the graveyard shift of Las Vegas' elite crime scene investigators. Holly Gribbs, fresh out of the academy, joins the team. Jim Brass is head of the unit and is trying to scare Gribbs from CSI. Catherine Willows, mother of a young daughter, is the number two CSI on this shift. Warrick Brown and Nick Stokes are competing to solve their 100th case to earn a promotion to CSI 3. Grissom investigates a murder staged to look like a suicide with precious little evidence. Warrick and Catherine take the case of a drunk who breaks into the house where he had been staying and is shot to death. Nick talks to a man who picked up a woman who drugged and robbed him.

A man is killed after winning a fortune and then dumping his girlfriend. So, Grissom, Nick, and newcomer to the CSI team, Sara Sidle, investigate this one. Holly Gribbs is in the hospital and Warrick is up for suspension for leaving her at the crime scene by herself.

Grissom, Nick, and Sara search for a kidnapped woman and find more than they expected. Catherine and Warrick investigate the hit and run death of a little girl.

Grissom and Catherine investigate when a leg is found severed from a body in a lake. They suspect the husband and boyfriend. Meanwhile Sara and Nick investigate a fraternity pledging gone terribly wrong.

Grissom and Warrick take the case of a young man who is found naked in the desert without an obvious cause of death. Sara gets to find out why the body of a woman who was buried last week is in a dumpster. Catherine and Nick investigate the killing of a school's dean by the school's founder.

Catherine violates department protocol when she takes the case of a rape accusation against her ex-husband. Warrick and Sara search for the missing bullet that will either exonerate or indict a cop for murder. Grissom and Nick investigate when a female skeleton is found under a house buried in cement.

When a teenager and her sister are the sole survivors of the gruesome murder of four members of one family in a quiet suburban neighborhood, Grissom and his entire team investigate the crime. What initially looks like a bizarre cult murder becomes more disturbing when they discover the motive behind the massacre.

Royce Harmon was murdered 3 months ago in a scene staged to look like a suicide. Now another murder has taken place. Whoever the killer is he has a thorough knowledge of forensics, he purposefully has left evidence, and has baffled Grissom and his team. Warrick and Nick investigate the case of a man who went over a cliff in his car and is now unconscious.

Grissom and his team investigate the death of a first class passenger on a flight to Las Vegas. The investigators are forced not only to examine the physical evidence, but also to interview all of the first class passengers to get their personal accounts of the incident.

Grissom and Sara investigate a bug riddled body found in the desert. Warrick and Catherine look into the theft of some valuable art. Nick gets to find out why a missing woman's car is found at the bus station. Warrick is suspected of having gambled on duty.

A woman is abducted from a supermarket. In the store, Grissom finds a bathroom stall door that claims five women have been killed. Warrick is caught in a casino on duty and is paired with a reluctant Sara. Their case is the apparent murder and robbery of a man who is found by his brother. Nick gets pulled in by his prostitute friend who gets in a scuffle with hotel security.

A man about to go on trial for arson and the murder of his wife and child seeks assistance from Grissom to help prove his innocence. Meanwhile, Catherine and Nick investigate the underground world of sports gambling when a teenager is murdered at close range.

A bomb goes off in an office building killing one and injuring many more. The chief suspect is a security guard who left minutes before the explosion and has knowledge in bomb making. Nick helps his prostitute friend again. After giving in to his passion, she is found dead the next morning. Naturally, Nick is a suspect and to make it worse, Ecklie has the case.

When a single human bone is discovered in the desert, Grissom and Catherine must cover miles of territory to find the rest of the skeleton. And Warrick and Sara trace the death of a male stripper to members of a wedding party who may have celebrated a little too hard the night before the nuptials.

At a swanky fundraiser, attended by the sheriff, a woman turns up dead in the pool. The owner of the house is away and a young couple is housesitting. Warrick looks into an apparent professional hit in the glass elevator of one of the hotels.

A woman is abducted from a mall parking garage. She's raped, beaten, shot and left for dead. Sara collects evidence from her and grows attached to her. Nick and Grissom analyze the crime scene. Catherine and Warrick are given boxes of evidence from a shooting that goes to trial in four days. The CSI who had the case has quit and they have to prove what happened. To make Catherine's life more complicated, Eddie has taken out a second mortgage without her knowledge.

A body is found in a pottery store in what's apparently a robbery that was interrupted. Fingerprints at the scene seem to match a twenty year old kidnapping case. Sara and Warrick look into a case where a woman burned to death in her home. The woman was burned to an ash but only the chair she was in was burned, the rest of the house is fine. Sara believes they have a case of spontaneous combustion.

A couple leaving a restaurant on their anniversary are killed in the street and their car is stolen. The crime scene is compromised when it rains shortly after the CSIs arrive. It gets more mysterious when the car is found and it becomes a new crime scene. Catherine looks into the collapse of a city owned residence that kills three elderly women. She runs into problems with the city engineer responsible for the building.

The entire team investigates the abduction of the infant child of a well to do family. Suspicion immediately falls on the child's parents.

Two teenage girls run over a deaf man with their car but they didn't kill him - he was already dead. Grissom has to find out who did it and he's not getting help from the deaf man's school. Catherine and Nick investigate an apparent mob hit that leaves five dead in a coffee shop.

Grissom, Nick, and Warrick take the case of a jogger who was killed by a wild animal in the park. It gets complicated when they discover that the jogger had his liver removed after he was killed. Catherine and Sara investigate the death of a six year old girl at a shady carnival.

On the day Grissom has to evaluate his team, a head is found in the trunk of a car. While Gil and Catherine work on the head, Sara and Nick investigate a body in the desert that's missing it's head. Warrick looks into a murder in juvenile detention in which his young friend James is the only witness.

The team is investigating the ongoing murders by a signature killer. The killer has some knowledge of forensics and has left little evidence behind. With the investigation somewhat stalled, the sheriff invites the FBI to join the case. This makes Grissom angry and it only gets worse when Sara offers to bait the killer.

Grissom and crew are called in after high roller Tony Braun, a known drug addict, is found dead in his house by a gardener. Since drug paraphernalia are discovered near his body and it is also determined that he had recently inhaled heroin, the cause of death is at first thought to be an overdose. But further examination of the corpse reveals that Braun had been restrained at some point with duct tape, leading Grissom to believe that the victim was forced to ingest lethal amounts of heroin and, perhaps, other drugs.

The entire CSI team investigates a disappearance at a local university. A young woman vanished, seemingly off the face of the earth. Forensics leads them to possible suspects, and possible suspects all have probable motives, but nothing seems to pan out. This leads our team to discuss the "Chaos Theory." When combined, many seemingly-innocuous events may have a deadly outcome. And closure is not always within reach.

Grissom investigates a possible suicide at a high-profile construction site. Against the wishes of the Sheriff, Grissom pushes to get at the truth of the matter-he thinks the suicide was actually a homicide, and uses theories on electrocution to look for his killer. Meanwhile, Nick and Catherine take on a case with little more than angora fibers to follow. A teenage boy dies while in session with his female psychologist, and traces of angora on his underwear make them believe the psychologist may be practicing very unconventional methods of "therapy."

When the class clown at the local high school is found murdered, the CSI team is called to investigate the student, who is also the top jock on campus, is found shot in the back in the school bathroom. The CSI team quickly discovers that the victim was also the class bully, and Grissom is convinced that he is looking for a classmate who was finally pushed to end the abuse once and for all. The team uses sophisticated new equipment to track the scent the killer left behind. Meanwhile, Sara and Nick investigate a case involving a severely decomposed body of an Army veteran found in a bag.

Grissom, Sara and Warrick are called in to investigate an abandoned, blood-splattered apartment and Nick and Catherine must examine a dead scuba diver lodged in a tree.

The team members are suspicious when the former tenant of the bloody apartment claims that his missing girlfriend is visiting her parents -- and the parents say she never showed up.

Meanwhile, Nick and Catherine are called to the site of a large fire and are confronted with the scuba diver found dead in the top of a tree near Lake Mead. Is it a murder or an urban legend turned fact?

Grissom and his team investigate a murder suspect who is caught red-handed -- burying the victims -- while Catherine and Warrick take on the case of a woman found dead in a hotel spa. As Grissom, Nick and Sara investigate the seemingly clear-cut murder case, Grissom questions the simplicity of the evidence when he discovers that the suspect burying the victims is the brother of a convicted felon. Meanwhile, Catherine and Warrick must determine if the woman found dead in the hotel spa was the victim of negligence, foul play or heat-induced natural causes.

Grissom and Nick investigate the death of a book restorer while Catherine and Sara are called to the scene of a fatal train crash. When the female book restorer is found dead and locked inside a "cage," a temperature-controlled workspace, Grissom and Nick attempt to determine whether this is a case of suicide or homicide. They discover that the key to solving the case may be a co-worker who suffers from autism. Meanwhile, Catherine and Sara are sent to comb through the wreckage of a collision between a train and an SUV and find out if it is a case of road rage or simply an accident.

Grissom and Catherine investigate the apparent violent death of a woman found in a sandbox. Their investigation leads them to the underground world of s and m clubs. Meanwhile, Warrick and Sara are called to a crime scene to investigate a shooting, which initially appears to have taken place during a robbery.

Grissom and his team investigate a casino heist during which innocent victims were shot, while Catherine and Sara are called to the scene of a murder in a remote part of the desert. The evidence found at both crime scenes -- the crowded local casino and the isolated desert convenience store where a clerk was murdered -- has the CSI team drawing a correlation between the two crimes.

With Grissom away, Warrick is in charge for the first time as the team investigates the murder of the con artist, who has run off with some tourists' money only to get shot and killed in the parking lot. The prime suspect in the case turns out to be Captain Brass' daughter, which causes Brass to take himself off the investigation professionally, but not personally.

The CSI team is called in when a famous real estate entrepreneur is found dead in a hotel elevator. When the body of Bob Fairmont, the real estate developer, is found, the team discovers that the crime scene has been tampered with and that the victim has been re-dressed. After tracing the cause of death to a lethal poison, the team is shocked to discover that Fairmont's organs have already been removed and donated, making the case a bit more difficult to solve.

Grissom and Sara are called to the crime scene when two murder victims are found hidden in pipes at a construction site in the middle of an alfalfa field, while Catherine and Nick investigate an ostensible hunting accident. The investigation of the construction site murder reveals that the victims were sisters and the relationship of one of the sisters to a former prison inmate is a cause for suspicion -- especially when his presence is traced to the scene of the crime. Meanwhile, Catherine and Nick begin to doubt seriously that the body found in the woods was the victim of a hunting accident.

Grissom's nemesis, serial killer Paul Millander (Matt O'Toole), reappears and claims a third victim in this gripping episode. The latest slaying matches Millander's previous killings in that it recreates his father's murder, which Millander witnessed as a boy. In each case, the victim is shot once through the chest while lying in a bathtub. A nearby tape recorder contains the person's supposed suicide message. All three victims share the same birthday of Aug. 17---the date Millander's father was slain---with the years in descending order from 1959. So presumably, the killer's next target was born Aug. 17, 1956...which just happens to be Grissom's birthday.

Catherine is ordered by a kidnapper to accompany a man who is to deliver $1 million in ransom to him or else he will kill the man's mistress. But when the million is paid, they learn that his mistress is already dead.

Grissom investigates the murder of a Las Vegas photographer whose remains were dumped at a nearby body farm where CSIs routinely study corpses, and his findings reveal that the man was apparently shot to death even though there are no bullet fragments in the body. Also, Grissom's leadership is questioned by some members of his staff.

When Terry Rivers barrels into the opposing team's goalie, a fight breaks out and Terry ends up at the bottom of a huge pile of bodies. After the players are separated, he is found dead...with a deep, bloody gash across his neck. Grissom, Catherine and Sara are called in to investigate. Across town, Warrick and Nick look into the apparent drug-related death of a sax player at a casino. While working on the case, Warrick finds himself drawn to a rising young singer who worked with the dead musician.

Grissom investigates the murders of four monks who were shot point blank while chanting in a Buddhist temple; Catherine reopens a cold case in which her best friend was murdered, after the man convicted of the crime claims he's innocent shortly before he dies.

A bus carrying 23 passengers from Los Angeles to Las Vegas crashes less than 40 miles from its destination, killing nine people. Before he dies, the driver recalls that, moments before the wreck, the steering wheel began vibrating like a jackhammer in his hands, making it impossible for him to control the speeding vehicle. When the bus finally did come to a stop, it was on its right side on top of a sports car that was following it. At the scene, the CSIs discover that a recent parolee was on the bus, but is now unaccounted for---and that there's evidence of foul play.

Jane Galloway is a nervous breakdown waiting to happen. She has completely shielded herself from the outside world, but that doesn't stop a stalker in her attic from killing her. When CSI arrives, they find her hair dyed and her face shoved in the toilet. This image has a heavy impact on Nick, and they soon realize that this stalker is well acquainted with Nick, which makes the CSI the next target.

Grissom and Catherine investigate the stabbing death of an 80-year-old woman who lived in a run-down house full of cats; Nick and Sara comb through the remains of a car bombing that was, apparently, a murder plot gone awry.

Grissom and Sara investigate when a man's body, which has been doused with lye, is found buried in a park; Nick tries to determine how a hiker apparently drowned in a desert.

Grissom and his crew handle their highest profile case to date when the city's former chief of detectives is slain execution-style in his house following a wild party. Missing from the residence are the chief's trophy wife and their 7-year-old daughter. When several motorists report seeing the girl along an access road near Miami, Catherine and Warrick fly there and meet that city's top CSI, Horatio Caine, who aids them in the investigation.

Season Finale. The CSIs investigate when the body of an unidentified young woman is discovered stuffed in an overturned shopping cart near a freeway underpass. Her horribly disfigured and partially decomposed face is a nightmare of blood, scabs and scars, as if she'd been shoved into a fan. A huge circular hole dominates her left cheek. Someone not only wanted her dead, Grissom reasons, but "they wanted her ugly." Adding to the mystery are the cart's other contents: an expensive handbag, fashion magazines and a leather day planner with notes written in code.

Catherine and Nick investigate street racing after one of the drivers is found dead out in the desert at an abandoned airstrip. Back in town, Grissom and his crew look into the death of a poker player who suffered a violent convulsion in the middle of a high-stakes game with three others. As always, things aren't what they seem.

Grissom and his team investigate a crime involving a popular actor; one woman is dead in his hotel suite and another is missing. They must perform under not only the media spotlight, but also under the scrutiny of Grissom's mentor, Dr. Philip Gerard, who uses his knowledge of Grissom and the other CSIs to discredit their evidence in his role as hired expert for the defense.

Grissom and Catherine investigate the murder of a wealthy couple who are found outside of their home, which was up for sale. Meanwhile, Sara probes the death of a cheerleader who is found eviscerated on a soccer field, her organs having been ingested by her killer.

Grissom suspects murder when the body of a dwarf is found hanging from a rope high above a stage in a casino hotel where a convention of little people is being held. Across town, Catherine is attacked at a crime scene where a man was murdered during what appears to have been a home robbery.

Grissom, Warrick, and Sara investigate when a woman vanishes while taking part in a magician's act. The primary suspect is the magician. Catherine and Nick investigate the apparent overdose of a rock star.

Fifteen years ago, Catherine helped put a man on death row for the rape and murder of a coed at a nearby college. The man is about to be executed when he's granted a stay based on new DNA evidence. When bodies turn up at the school, killed in identical manners, it's thought the killer might actually be on the loose.

A boxing champ dies in the ring after taking a brutal beating from his nemesis, but Grissom finds evidence that points to murder. Outside, in a nearby parking lot, Catherine works a crime scene where a Los Angeles gang member was gunned down, apparently by a rival gang. Also, Nick investigates a jewelry-store robbery.

Catherine is called in by a pornographic-film developer to view graphic footage from a snuff movie in which a woman is brutally slain. Grissom investigates an ant covered body that's been dead over a year.

A cab driver seems to run over a boy and is then beaten to death by a mob for racial reasons. When Grissom arrives on the scene, he discovers that the teen has been eviscerated and has stab wounds, but shows no signs of having been struck by the cab.

Grissom, Warrick, and Nick investigate the case of man who apparently was murdered and pushed off a six story building. Grissom's involvement is cut short by renewed hearing problems. Catherine looks into the murder of a man outside of his regular bar.

Grissom and Catherine investigate the grisly meat grinder murder at a slaughterhouse. Warrick and Sara look into the apparent suicide of a troubled young woman.

Some bird watchers find a raven with a human eyeball in its mouth. This eventually leads our CSIs to a divorced man and his 2 children but not much else. Warrick and Grissom look into the circumstances of David's unusual and first autopsy. This takes them to a car dealership where the man worked.

Warrick investigates the drive by murder of a young girl in his old neighborhood. The girl's father is a friend and mentor of Warrick's as well. Warrick struggles to control his emotions to the point where Grissom pulls him off of the case. Nick tackles the murder of a computer company employee. The only supects are the three other employees in the building.

Catherine takes the point in the investigation of an escalating series of peeping tom incidents. The crew is racing to stop the attacker before his crimes become more serious assaults. Meanwhile, Sara reopens the dormant case of her friend, a district attorney. The DA is facing surgery to remove a bullet she got in an attack that killed her husband three years prior.

Warrick and Grissom investigate the death of a man found at a foam party. Nick works on the case of a man found dead in his home. Catherine and Grissom investigate the death of a women who was involved with the aforementioned two men, all of which lead to Lady Heather. Catherine desperately tries to find out where her missing daughter and ex-husband are. Sara eventually takes over the case.

A man driving with a wooden stake in his head dies in front of a casino. Grissom and Nick work to discover the 'vampire" killer. Warrick and Catherine hunt for the killer of a NBA star's 5 year old son.

An elderly woman crashes her car into a crowded restaurant. One of the patrons is Sara's paramedic boyfriend. Grissom and Nick investigate the possible carbon monoxide murder of a woman in her home.

Catherine, Nick, and Sara investigate a seemingly months old body found in the mountains. Discovery of the man's identity lead the team to the world of robot wars. Warrick and Grissom look into the case of a man found murdered in an alley. Complicating their efforts, the medical examiner "lost" the body for 11 days. Greg helps this case by doing some undercover work.

Grissom and Catherine investigate a movie-goer who was stabbed to death; the team comes to a forensic impasse while processing a teenager who died from a gunshot wound.

Grissom and Catherine investigate the murder of a despised comic who died onstage, apparently after drinking from a tainted bottle of water. The case grows more puzzling when a 15-year-old boy dies in a convenience store after drinking the same brand of water. Brass reopens a woman's accidental-death case after spotting the deceased's husband in a flashy new car with a trophy date on his arm.

The trampling death of a trainer by her horse aboard a private jet is investigated by Grissom, Catherine, and Nick. Sara and Warrick look into a Romeo and Juliet scenario in the desert.

Grissom, Sara, and Nick investigate the murder of a woman in the press box of a high school stadium. They arrive less than an hour after the woman's death. Catherine and Warrick try to determine the cause of an explosion in the DNA lab of CSI that seriously injures a lab tech. The personal lives of our characters come into play in this episode.

A professional bank robbery leads to the death of a detective. While investigating the case, Grissom deals with his hearing loss and another CSI gets a personal revelation.

Two couples meet in a bar and one of the couples is murdered. When a second couple is murdered in a similar fashion the team suspects a pair of serial killers are on the loose. The case is complicated by leaks to the press and a judge reluctant to issue a warrant. Catherine gets some troubling news about her father's murder trial.

When the lead suspects in Grissom's serial killer case are murdered, Grissom suspects an inside job. Grissom and Brass are at odds when Grissom suggests it was a cop. Catherine and Sara investigate what happened to a college football fan when his bloated body is found in a bathtub.

Grissom and Warrick get the case of an old woman found mummified in her closet. Sara and Nick arrive to investigate a breaking and entering to find a raped teen. These cases are not as disparate as they first seem. Catherine looks into a gun found by a boy. The gun is connected to a week old murder across town that Warrick caught.

During Vegas' latest Heat wave of triple digit temperatures, Gil and Catherine investigate a baby locked in a car. Warrick investigates a man's death of an apparent heat stroke in his house. Nick and Sara investigate a woman's body found floating in the lake with a blow to the head.

The team is introduced to the "Furry" side of Vegas when a man is found dead on the side of the road, dressed in a racoon suit. Elsewhere in Vegas, a gunshot victim is found in a deep-freezer, frozen solid.

A severed head is shipped to Dr. Robbins from Jackpot, Nevada. Grissom goes to Jackpot to find the rest of the body and gets very little cooperation from the locals. Catherine gets an unexpected gift from her father.

Warrick's appearance at the preliminary hearing on a rape and murder case goes terribly wrong when the only piece of evidence is thrown out on a technicality. Grissom and the team have 24 hours to make the case with new evidence or the killer will go free.

A suspect's infatuation with Catherine results in her taking over a high profile case. The case is a missing woman who aspired to be a showgirl. Sara and Nick are angered since it takes the career making case away from them.

The sheriff is under political pressure to find who killed an air marshal with a car bomb that the sheriff witnessed. Grissom, Catherine and Nick are pressured to produce results. Warrick and Sara try to find the murderer of the wife of a singer who headlines on the strip.

A teenager is found murdered on a construction site. Grissom, Sara, and Warrick follow the lead of blood on a hammer. Nick, with an assist from Catherine, tries to find how a woman was killed by a gunshot on her lawn when no one nearby had a gun.

The lone holdout on a jury is found dead in the jury room. The eleven jurors who were voting guilty and who hated the dead juror are the natural suspects. Nick reopens a four year old case when the sister of the victim comes forward with new evidence.

A woman found murdered in her home. Her resemblance to Sara causes Grissom to take a personal interest in the case and forces him to examine the decisions he has made in his life.

Three little CSIs (Grissom, Sara, and Nick) respond to an electrocution at a casino. The casino is hosting Japanese antiquities. The electrocution is just a ruse to steal the central piece of the exhibit. Catherine and Warrick deal with a vampire murder.

A robbery at a grocery store results in a shootout leaving five dead. The police officer at the scene believes Grissom has a grudge against him. The entire team has to process the enormous amount of evidence at the scene.

The whole team must investigate a crime where a husband and his porn star wife were murdered execution style. Things get personal for Catherine when Grissom talks to her about her evaluation. Brass believes that Sara may have some type of problem.

Catherine and Sara deal with the death of what at first seems to be a transvestite. Later during autopsy they find out that the make-up he seemed to be wearing was actually facepaint, he was a clown. Grissom, Nick, and Warrick deal with the death of a man in a homeless area. They found out he worked in a recovery center for drug users.

A mutilated female body is discovered tied to the undercarriage of a bus carrying prisoners from a women's correctional facility after a severed arm flies out from beneath the vehicle and strikes a car. Catherine leads the investigation and at first believes the woman was escaping, but the evidence increasingly points to murder. Back in town, Warrick probes the death of a gambler who was stabbed multiple times in his brother's kitchen.

A violent murder in a casino parking garage and another episode in the police interview room lead the CSIs to one shocking discovery after another. The case involves a missing woman, a long dead body and a missing child.

Warrick, Catherine, and Nick try to determine the cause of a house fire that kills a teenage girl. The fire is in the same neighborhood as a similar arson fire. Grissom and Sara investigate a man found dead with letter tiles in his stomach. The man was a competitor in a word game tournament.

Grissom, Catherine and Nick investigate the death of a runner during a competition. Meanwhile Sara and Warrick investigate the death of a couple in a hotel room, initially thought to be a murder-suicide. Both cases take place during this 'cop' competition, with more than 20.000 attendants (all of them cops). This gives the investigations an interesting turn, as almost all the suspects and all dead people are cops.

A roller coaster runs off its track, leaving six people dead. The CSI team investigates whether this was an accident or foul play. One of the deaths, however, is not what it seems, and this takes the case in an unexpected direction. Meanwhile, Catherine and Warrick investigate the death of a 13-year old girl whose body was dumped unceremoniously outside town.

Two young men are found murdered after scamming Sam Braun's casinos. Because of her relationship with Braun, Grissom refuses to allow Catherine to participate in the case, leaving the rest of the team to solve the mystery. One of the suspects is the son of a man who was black-listed for cheating years ago in Sam Braun's casinos. Sara finds out that Grissom recommended Nick for the promotion that she wanted.

A casino employee is beaten and raped on her way home from work, but she survives and identifies her attacker. Unfortunately, a DNA test sets him free and Grissom must wrestle with whether evidence can ever lie. Later, Grissom comes to the rescue of a coworker who ends up on the other side of the law.

Wild night in Las Vegas has the CSIs simultaneously investigating four fatalities.

.Heavy rain in Las Vegas causes the CSI team to investigate the demise of victims found in the sewage drains.

.The CSI team investigates the kidnapping of a young girl.

Catherine and Nick delve into the dark world of hazardous cosmetic procedures to keep people looking young, while Grissom, Sara and Greg investigate a man found dead in a house tented for termites.

The CSI team investigates a suburban murder with a sexual twist.

Grissom is haunted by the return of the blue paint serial killer that got away two years ago.

Grissom works with a new CSI from the dayshift on an apparent kidnapping from a high school formal held at a Vegas casino.

A murder investigation leads the CSI team to explore the world of trangenders, which turns into the ultimate case of mistaken identity.

An undetected piece of evidence in an old murder case has the graveyard shift under internal investigation.

Tension rises as the CSI teams adjust to their new assignments while investigating two vastly different murders.

The CSIs investigate the murder of a Sherlock Holmes enthusiast in his perfectly re-created Victorian Era Baker Street study.

Catherine and Nick delve into the dangerous world of a Mexican band with a cult-like following, while Warrick and Sofia investigate a man found dead in a handicapped van.

The CSIs discover two female corpses that turn out to be part of an undercover Russian mail-order bride operation.

The CSIs suspect third party involvement in the murder of a hunter and a bear found in the outskirts of Las Vegas.

Grissom and Catherine's teams work together to discover the truth behind the death of a larger-than-life casino owner.

The CSIs search for a murderer at a convention for overweight adults.

Grissom and his team use new technology to process a fingerprint from an old crime scene while they investigate a serial killer.

Wild day in Las Vegas has the CSIs simultaneously investigating four fatalities.

Captain Brass goes to Los Angeles to investigate a case involving his estranged daughter.

Grissom and Sara investigate the brutal murder of an inmate at a locked-down state mental hospital.

The man Catherine flirts with at a bar comes back into her life as a suspect in a murder investigation.

The CSIs find themselves immersed in university life when a couple of amorous freshman are found dead in a college dormitory.

The CSIs are in a desperate race against time to save a member of their team.

The CSIs are in a desperate race against time to save a member of their team.

The forensic teams come back together under the leadership of Grissom and Catherine just in time to tackle three complex murder cases.

The forensic teams are called to the hotel suite of a rising young movie star found dead in a compromising position.

The CSI team investigates a wife's suspicious death on a flight of stairs.

When one cult member turns up missing at a mass suicide crime scene, Grissom and his team investigate whether the small cult really committed suicide or were murdered.

The CSI team suspects an entire family has been murdered, but cannot prove it until they find the victims' bodies.

The CSIs uncover evidence that leads them to question whether or not a young mother's death was really a suicide.

When a police officer is killed in the line of duty, the CSIs must determine whether or not he was a victim of friendly fire.

The CSIs sift through the overwhelming evidence from a shootout with drug dealers in order to determine who is responsible for the death of a police officer killed during the incident.

The CSIs investigate the unusual death of a man found dead in a dumpster on Thanksgiving night.

The lack of evidence in a reported kidnapping case leads Grissom and his team to wonder if the case is fabricated.

Grissom and his team uncover unusual evidence in the murder of a man who looked like a werewolf.

The CSIs investigate the murder of a young man found dead in his girlfriend's garage after a night of taking drugs and partying.

Beautiful ex-showgirl from old world Las Vegas hosts a party that ends in murder.

In a CSI first, a crime will be shown from the killer's perspective.

The CSIs investigate the unusual death of a young woman whose body appears to have been used for scientific experimentation.

The CSI team explores the case of a man found stuffed down the chimney of a previous suspect's home. As they progress into the case, they encounter surprises and a few twists.

Reality show chooses Grissom and his CSI team as their subjects while they investigate smoke bombs being set off at various locations to simulate a building fire allowing the perp to commit his crime.

In the midst of a high profile murder trial, the CSIs are caught off guard when a witness's shocking confession casts doubt on the savage murder of a teenage girl.

Grissom and his team investigate the case of a psychic who envisioned her own death.

Grissom and his team investigate the murders of three teenagers involved in a rap music rivalry.

Solving the case of a wealthy defense attorney killed at her son's wedding is compromised when all of the evidence from the case is stolen along with Nick's car.

The CSIs must look beneath the surface to uncover the true story behind the death of a high-stakes gambler and ladies man.

Man accused of murdering his wife and co-workers leads the CSIs on a wild chase through a busy Vegas casino.

The CSI team holds vigil at the bedside of one of their teammates who is shot in the line of duty and may not survive.

When an aspiring dancer is murdered backstage during Cirque du Soleil's KA show, the CSIs investigate what goes on behind-the-scenes to uncover the truth.

Grissom is intrigued when he finds an exact miniature replica of a crime scene involving a famous ex-rock star.

The deceased victims in the CSI coroner's office give voice to their own murder investigations for the first time.

The CSI team investigates a series of brutal tourist beatings that take place within the span of a few hours throughout the Las Vegas area.

Grissom and his team investigate the case of a woman found dead in a parish church.

When two young boys are reported missing, Grissom goes head to head with a neighborhood pedophile in order to find them.

Grissom gets a chilling surprise when he receives another exact miniature replica of a working crime scene.

When identical twins are found dead on the same night, the CSI team investigates whether or not the two murders are connected.

Grissom and his team investigate a string of murders in Las Vegas that may be tied to an infamous mob boss from the 1970s who disappeared many years ago.

Case involving a man killed at a poultry manufacturing plant leads the CSI team closer to discovering the identity of the serial killer who leaves miniature replicas of his crime scenes.

Catherine is determined to connect an out-of-town killing to a recently released Las Vegas murder suspect in an attempt to bring him to justice.

Catherine and the rest of the CSI team find it challenging to get a good read on their new member as he joins them in tracking a recently active serial killer who has been killing since the 1970s.

Catherine must deceive her teammates when she agrees to Keppler's covert and controversial plan to catch the killer of a popular politician.

Nick and Keppler's case leads them to uncover a black market for human body parts while the rest of the CSI team investigates the case of a wealthy married woman who was found murdered in her own home.

Grissom returns from his teaching sabbatical as Keppler tries to conceal his ties to a double murder case that he and his CSI colleagues are investigating.

The miniature killer reveals he/she is still at large by sending Grissom an especially chilling miniature that forewarns a woman and her cat are scheduled to die the next day.

Grissom and his team are discouraged when they find a pool of blood as they begin investigating the disappearance of a high school basketball star and his cheerleader girlfriend.

While processing the house where several showgirls were murdered, Sarah is haunted by the terrified eyes and cryptic dying words of the sixth victim she discovers.

Greg is forced to again contend with the hostile mother and brother of the hoodlum he killed in self-defense several months ago when the CSI team discovers that the brother is involved in a new murder case.

While Grissom and the rest of the CSIs are out investigating new cases, Hodges leads Archie, Henry, Mandy and Wendy to believe that Grissom wants them to secretly band together that evening in an attempt to solve the four miniature killer cases.

In their attempt to identify the murderer of a has-been boxer who lived among a group of prostitutes who detested him, the CSIs must establish which of several life-threatening acts against him in one night actually killed him.

The CSIs discover that several suspects in a woman's murder are members of a bizarre UFO club who believe that shape-shifting reptile-like aliens have mated with humans for centuries as a means of conquering the human race.

Sara's uneasy about Grissom being reunited with Lady Heather during the CSI's investigation of her attempted murder by a client she refuses to name.

As the CSI team comes closer than ever to identifying the miniature killer, Sara mysteriously goes missing, forcing her relationship with Grissom out into the open.

Sara's fate remains in question as the CSI team rushes to find out if she survived an attack by the miniature killer.

The CSI team investigates two unusual cases, one involving the suspicious death of a go-cart racer who took his hobby to the highway and paid the price with his life, and a murder at a hip new restaurant where patrons dine in the dark.

The CSI team investigates the murder of an entire family, except for one daughter who supposedly is possessed by the devil.

Grissom and his team discover a young man strangled to death by hanging. whose body looks like that of a woman.

Grissom and his team go behind the scenes at a horror adult film studio when one of their lead actresses is murdered on the set of her latest movies.

In Part One of a Two-Part crossover episode to conclude on "Without A Trace," a kidnap victim from New York who went missing six years ago may be the same boy whose death Grissom and the CSI team are investigating in Las Vegas.

In Jorja Fox's last episode, a suspect from Sara's past returns, causing her to question her future as a CSI.

Hodges has ulterior motives when he stages hypothetical murders in the lab to give his colleagues a chance to play CSI. Also, everyone tries to reach out to Grissom after Sara's departure.

Warrick's addiction to pills begins to impact his job when his investigation into the underground mob in Vegas results in him being targeted as the prime suspect in a mob-related murder case.

Grissom and his team delve into the world of illegal dog fighting to find out who is responsible for the death of a wealthy socialite. Meanwhile, Warrick tries to clear his name in the murder of an exotic dancer.

The CSIs investigate two murders during the annual bull riding rodeo in Vegas that may be connected to illegal bull breeding.

Grissom and his team battle the flu when they are called upon by DDA Klein to investigate the deaths of several key witnesses for a grand jury case against a dangerous Las Vegas gang.

The disturbing death of a 3-year-old girl has a great impact on Catherine as she searches for clues to her murder.

Brass and Nick get help from an unlikely source, an incarcerated criminal, when investigating two murders that take place in the same apartment building.

Grissom and his team discover several victims who have green blood, leading them to the conclusion that their deaths are somehow connected.

Grissom and the CSI team become involved in the world of Hollywood comedy when a diva sitcom star meets an untimely demise while filming her show in Las Vegas.

Warrick is accused of murdering a famous Vegas gangster and even he is uncertain of his guilt or innocence.

The CSI team comes together after Warrick is shot in a Las Vegas alleyway,.

Hypnotist who uses her powers of persuasion to rob banks becomes the prime suspect in a murder investigation.

When a series of victims are found deceased seemingly in the middle of everyday activities, the CSIs must determine what is causing them to remain upright after death.

During the course of an investigation, the CSIs discover that their victim, a young woman who was murdered and found with several different blood types in her system, is the daughter of a wanted criminal.

When the CSI team investigates a case involving the world of domination, Grissom pays a visit to Lady Heather to help find some answers.

After a shooting involving a young boy occurs right in the middle of Koreatown, none of the witnesses will speak to the CSI team investigating the case.

The prime suspect in a murder case from 12 years earlier comes to the forefront of a new CSI investigation.

When a popular young singer is found dead outside an infamous Las Vegas nightclub, the CSI team uncovers a link between the present day crime and a murder from over 50 years ago.

When a new murder leads to a connection with an infamous serial killer, Grissom secretly joins the class of well-known criminal pathologist Dr. Raymond Langston, to gain access to the killer and get a crack in the case.

The CSI team is shocked and saddened when, after working with Dr. Raymond Langston on the "Dick & Jane" murders, Grissom announces that his time as a CSI has come to an end and offers Langston a permanent position on the CSI team.

The first day on the job for Dr. Langston turns from bad to worse when a simple burglary case quickly overlaps with a complicated arson and homicide case.

When an FBI agent who was working undercover is found brutally murdered, the CSI team is called in to assist the victim's partner in finding the killer.

Langston and Nick are called to investigate a murder at a fast food restaurant and have quite a task ahead of them when they discover that much of the evidence is coated in cooking oil.

While Langston testifies in the trial of a respected Congressman, new evidence sends the CSIs back to the lab to reopen the investigation.

The CSIs are called to three different crime scenes in one night that are seemingly unrelated, but each case's forensic evidence reveals a common link.

When the CSIs are called to a murder scene at a familiar motel, Nick is thrown for a loop as he pieces together three separate murder investigations that all took place at the same establishment over the course of a year.

Langston and Riley are taken hostage during the aftermath of a shootout in an usually calm Las Vegas community.

Langston is shocked when his former student is found murdered and becomes the focus of a CSI investigation into the world of Mexican wrestling.

Nick's case of a deceased skydiver takes an interesting turn when Catherine discovers there may be a connection between the skydiver and a mysterious double murder case.

When Hodges and Wendy run into each other at a science fiction convention for one of their favorite classic television shows, they end up investigating the murder of one of their beloved actors.

Catherine revisits one of the very first cases she worked as a CSI when the convicted felon in the murder claims the verdict was based on faulty evidence.

An unexplained illness that is affecting random citizens of Las Vegas baffles the CSIs.

The CSIs are on the case when a member of a motorcycle gang is murdered at a local biker bar.

Cache of missing chips from a closed down casino turn up in Vegas and a string of murders follow, leading Langston to use deadly force for the first time in his career as a CSl.

The CSI team, with the unexpected but welcome return of Sara, comes together to investigate the death of a famous young actress killed in a dubious traffic collision.

When a porn producer and drug dealer are found dead in a relatively upscale Vegas area, the CSIs focus their investigation on members of the neighborhood.

When two office mates plot to rob a casino, their plan ends with the CSIs investigating a murder.

When a policeman kills another officer, the CSIs must look to the evidence to determine if the shooting was premeditated or an accident.

An entire college football team comes under investigation when their beloved coach is found murdered in his home.

The CSIs discover that two apparently unrelated crimes are actually parts of the same twisted revenge plot.

The CSI team helps Langston investigate a prostitution ring that may have harbored a hostage Langston had been looking for in Miami and New York.

The CSIs investigate a murder at a bowling alley after a critical piece of evidence is revealed during a bowling tournament.

When Nick, Greg and Hodges take Henry to celebrate his birthday at a biker bar, they uncover a double homicide and find several suspects still at the bar who may be the murderers.

The CSIs dig to find the truth about how a recent shootout at a gun store might connect to a young woman who may have committed suicide.

Two beautiful women are murdered in a Las Vegas hotel and the CSIs uncover an unusual killer during their investigation. Meanwhile, Langston continues to hunt "Dr. Jekyll".

The CSI team delves into the world of professional golf when the body of a legendary player is discovered during a high-profile tournament.

The case of two high school students, one dead and one missing, lead the CSIs into the underbelly of streetcar racing and a tangled web of deadly competition.

When a band member of Rascal Flatts is electrocuted by his own guitar during a concert, the CSI team investigates if it was a case of foul play.

When a young boy is found murdered, the CSI team uncovers evidence that may link his death to an old case that recently resurfaced.

Catherine and Detective Vartann are thrown together in a hotel room for 24 hours as they stake out a duo making drugs in the room next door. Meanwhile, Nick and Langston work a case that involves a fetish which has become big business in Vegas.

When the CSI team investigates the brutal murder of a family, they trace the killer to the house next door, which might belong to the "Dr. Jekyll" serial killer.

When Hodges and Wendy take a group of high school CSI Explorer Scouts on a field trip, they embellish their role in solving cases and take their assignment a little bit too far.

When a student is discovered murdered at Lindsey's school, the investigation takes a sharp turn when the CSIs uncover an unlikely connection between the boy's death and atrocities of the past.

Legendary comic from the good old days of Las Vegas is set to reunite with his partner on stage for one night only, until one half of the famous duo is found dead.

Mother thought to be grieving for the loss of her family three years ago becomes a suspect in a CSI investigation.

The CSI team must investigate one of their own when Langston is accused by a former colleague of being part of the Dr. Jekyll murders.

The CSI's lives are on the line as they close in on the elusive Dr. Jekyll, and more than one member of the team may not live to see his capture.

Langston fights for his life after being stabbed by psychopath Nate Haskell, while the other CSIs attend a funeral that turns deadly.

Hysteria ensues when a shark attacks a woman in the pool at a Las Vegas casino "day club," and the CSIs must determine if the killer is human or shark.

Vampire and werewolf convention is at the heart of a murder investigation in Las Vegas.

Sqweegel, a serial killer who is punishing local heroes that harbor hidden secrets, is on the hunt in Las Vegas.

Woman who suffers from a condition called "hoarding" becomes a murder suspect when a dead body is found buried under piles of trash and debris inside her home.

When a college student ends up dead after a "Walking with Dinosaurs" show, the CSIs must determine if his death was murder or accidental.

When the CSI team discovers the shredded remains of a man, they find themselves with multiple suspects who may be responsible for his death.

Two men are murdered right before exposing a natural gas company for poisoning residents in a farming town, and the CSIs must discover who is responsible for their deaths.

Man's fatal fall from a hotel balcony launches the CSIs into an investigation to determine if his death was suicide or the result of foul play.

The CSIs set out to track down a pedophile suspected of murdering an FBI agent's wife and kidnapping his children.

The CSIs question the validity of an online picture depicting a murdered call girl until they find the same woman strangled to death in the dumpster that appears in the photo.

The CSIs link a body with severe burn marks to possible execution by electric chair - and to a legendary Vegas murder. Meanwhile, Greg asks out Ellen, a pretty schoolteacher and forensics enthusiast who has been touring the crime lab.

Night full of celebration ends with a bang when the director of a scholarship foundation for the deaf is killed by a deadly car bomb, prompting Sara to interrogate the students and faculty of the college where her mother-in-law works.

Thrift store donation turns gruesome when a dead body is found in a box; meanwhile, Langston's wife pays a surprise visit to the crime lab.

Langston testifies against the notorious "Dick & Jane" killer, Nate Haskell. Meanwhile, Nick receives a call from troubled teen Jason McCann to warn him of impending danger.

The CSIs are on zombie alert when two men initially pronounced dead mysteriously come back to life.

While investigating the murder of a convicted ex-cop, the CSIs stumble upon a list in his prison cell with names of several individuals he believed might have been his wife's true killer.

String of deaths, including a gamer found dead on his couch and a newly divorced man at the bottom of a pool, instigate a bet among the CSIs as to whether they've "hit for the cycle" - a homicide, a suicide, an accidental and a natural death all in one night.

Langston and Sara turn to Lady Heather for help in tracking down the culprit responsible for injuring a woman before she was seemingly mauled to death by a mountain lion. Meanwhile, Nick and Dr. Robbins manage to rescue the unborn baby of a teenage girl who appears to have committed suicide.

Following his escape, Nate Haskell, the notorious "Dick & Jane" killer, resurfaces when he e-mails a disturbing video to the father of one of his brides, threatening to take her life.

Langston becomes more determined than ever to track down Nake Haskell, the notorious "Dick & Jane" killer, after discovering that he's kidnapped his ex-wife, Gloria.

After years of pursuit and a countless number of murders, Langston comes face-to-face with serial killer Nate Haskell inside the house where his killing spree began.

Multiple shootings and stabbings on a public tram leave the CSI team with one witness and a lot of questions.

Three suspects come forward with three different reasons why they killed an entire family and the CSI team has to determine who is telling the truth.

While on a date, Stokes realizes a piece of art at an exhibit has decomposing body parts in it, which leads to a full-blown investigation. Also, D.B. Russell makes a decision to ground one of the staff from the case.

The former Mayor of Las Vegas is shot at the Mob Museum and the CSIs embark on a history lesson in search of clues.

When a hijacked medevac helicopter with CSI Brody aboard goes missing, the entire team is on hunt.

When a Jane Doe is found near the freakish attractions of a 19th-century-inspired traveling sideshow, the team investigates a cast of unusual characters.

When the CSI team arrives at a car crash, they find three casualties and a human brain that doesn't belong to any of the victims. Also, D.B. Russell is concerned his son is not focused on college following his suspension from school.

When the CSI team investigates three seemingly unrelated murders, they discover someone is getting revenge for cold case murders that were never solved.

When the CSI team discovers a deceased rancher was also a ballistics expert, they have to work with the FBI to solve the case.

When the body of a naked dead man is discovered by Dr. Robbins' wife in their master bedroom, it leads to a lot of questions for the CSI team.

When Willows works with the FBI again after a professional hit occurs at a law firm she recommended to her friend, the CSI team identifies shocking similarities at the crime scene.

The CSI team says goodbye to Catherine Willows as she makes a life-changing decision.

When a woman is found dead and her hair is done up '70s style complete with vintage clothes, the CSI team discovers clues that point to a killer with a hair fetish.

Russell asks for advice from a former colleague on a case involving the death of a man's ex-girlfriend.

When a house is stolen completely off its foundation, the CSIs are on the case in search of answers. Meanwhile, new CSI Julie Finlay showcases her skill in blood analysis.

When a blackout cripples the city, the CSIs must revert to old-school methods to solve the case of a missing child.

The CSIs are brought in to solve the case of a recently murdered student whose death photo ends up trending on the Internet.

When the CSI team is called in to investigate a robbery-homicide at an "Alice In Wonderland"-themed wedding, they have little to work with to find a killer. Meanwhile, Hodges' mother comes to town, and he wants her to believe Morgan is his girlfriend.

When the CSI team is called in to investigate a man who is shot at point-blank range in a local casino, they shut down the entire building to find their killer.

When Stokes learns that a man he helped put in prison is going to have his conviction overturned, the CSI team needs to prove the killer is guilty again or he will be released.

When a bomb kills an off-road race truck driver mid-race, the CSI team is called on the scene to investigate why.

The CSI team investigates three dead bodies just blocks away from a campaign dinner, they think they know who the killer is before making a shocking discovery.

Russell's granddaughter was kidnapped in last season's finale cliffhanger and now he leads the CSI team on a hunt to find her.

The CSIs arrive at their favorite diner only to discover a gruesome crime scene with eight dead victims and a lot of questions.

When a girl is shot and killed at a large rave in the desert, the CSI team has to search for clues, find her missing friend and bring the killer to justice.

When a famed music historian is murdered and left in a piano, it has an emotional effect on Sanders, who had a past with her.

When a K-9 is blamed for the death of his partner, the CSI team discovers there's more to the case. Meanwhile, Finlay and Morgan investigate the death of a high-profile divorce lawyer with a lot of enemies.

Things get personal when D.B. Russell is drawn into the investigation of the death of his son's basketball coach.

The CSI team investigates the death of a reverend who was killed at the grave site of former CSI Warrick Brown.

When five bodies are found in what appears to be a meteor site in the middle of the desert, CSI Finlay recognizes one of the casualties, prompting her to revisit her past.

The CSI team lends a hand to local law enforcement on the strip with several arrests until a John Doe is found in car. Also, things become personal for Captain Brass when he discovers some facts about his daughter.

When five people are killed in a small plane crash a mile off the Vegas strip, the CSI team is called to investigate. Also, Sara feels the strain of having a long-distance relationship with Grissom when a former lover of hers is involved with the crash investigation.

The CSIs investigate the demise of a prominent news anchor during a live broadcast.

The CSIs need to ace the case involving a rising tennis star. Meanwhile, the CSIs are surprised to hear Hodges is engaged to an Italian bombshell.

When CSI Mac Taylor decides to surprise his girlfriend in Vegas, he discovers she's missing and asks his friend D.B. Russell for help. Meanwhile, the CSIs investigate the loss of a local wine collector on part one of a two-part crossover with CSI:NY.

The CSIs investigate the demise of a famous Cuban singer's sister who's in town as part of a U.S. tour. Meanwhile, Hodges begins to get cold feet at the prospect of marrying his Italian bombshell girlfriend.

Sara is a lead suspect in an investigation after a brief encounter with another man in which she was the last person to see him alive. Also, her separation from Grissom begins to take a toll.

When several prominent poker players lose their lives, the CSI team is called to investigate before more victims surface.

The CSIs join David Phillips at his high school reunion when he discovers the prom queen's been murdered.

When the CSIs find a body near a forest reserve, they discover what might be a serial killer and his bizarre lair.

When the CSIs investigate a triple homicide, Russell has to find a way to connect with a 6-year-old girl who was the sole survivor and witness.

The CSI team investigates a popular spiritual retreat when a body is found floating in a mud bath. Meanwhile, Hodges questions his marriage plans to Elisabetta.

The CSI team investigates the death of a ghost hunter.

As Russell and his team investigate a series of murders, one of their own confronts peril on a dangerous undercover mission to get close to the killer.

Russell leads the CSI team on a hunt to find Morgan and Ellie Brass following their kidnapping by a ritualistic killer.

The CSI team is called in to investigate a murder and robbery at a poker game that had more than a million dollars in chips on the table.

The CSI team investigates a fire at a music venue that leaves four people dead, including two band members.

When contestants on a reality cooking show accidentally eat human flesh during a competition, the CSI team is brought in to investigate.

Catherine Willows returns to help the CSIs solve a cold case that has haunted the team for 14 years.

The CSI team investigates the death of a homeless man who had a huge winning streak at a small casino.

The CSI team investigates a John Doe found during torrential rains in Vegas. Meanwhile, Greg Sanders is investigated and accused of framing a man for murder seven years ago.

When a man is found dead inside a human-sized hamster ball, the CSI team is brought in to investigate. Also, the team collaborates with a swing shift CSI on a case involving a serial rapist.

The CSI team is called in to investigate the stabbing of a couple found at a local motel that is reminiscent of two incidents that occurred in the same room.

Spa weekend for Sara, Finlay and Morgan turns into a murder investigation and missing persons case when Finlay disappears, as the CSI team must piece together what happened in detail to find her.

When a man is found murdered at an elaborate holiday party complete with real snow and live reindeer, the CSI team is brought in to investigate.

Petty crime aboard an inbound plane to Vegas becomes a murder investigation when one of the passengers is found dead.

The CSIs are called to investigate a car crash and are shocked to discover the victim is someone they know.

When the CSI team works two separate investigations, one involving a woman found murdered in Mexico and another of a local couple found dead in their driveway, they find the evidence in one case may help the other.

Nick and Greg investigate the death of a 16-year-old girl with ties to a brothel.

The CSIs investigate the murders of an Elvis impersonator and a bird that are strangely connected.

The CSIs investigate the murder of a rock and roll groupie and the disappearance of a prostitute that both have ties to a mysterious band.

The CSIs are called to investigate when an entire family is reported to have been missing for a month.

Russell is taken hostage after a teenager opens fire in a police station.

The CSIs track a cannibalistic killer and discover he's not alone.

The CSIs investigate the cyber-related murder of a prominent casino owner's wife and receive help from the FBI's Cyber Crime Division.

The CSIs investigate a present-day crime with ties to a mob heist that occurred 25 years ago. Meanwhile, Brass has a decision to make when his daughter attempts suicide.

Finlay must deal with a bomb planted in her car, while Russell gets a call from someone claiming to be the Gig Harbor killer.

The CSI team investigates a robbery and fatal shooting at a medical marijuana shop.

Sara and Greg are quarantined after responding to a crime scene that's contaminated with a deadly pathogen.

The CSI team suspects foul play when a chemistry teacher's science experiment goes horribly wron.

Morgan, Sidle and Finlay try to relax at a forensics conference when a mass shooting occurs on site.

Frustration mounts for the CSI team as another victim surfaces and all evidence points to the Gig Harbor Killer.

The CSI team investigates the death of a woman full of alcohol and drugs in a pool at a rehab facility.

The CSIs delve into the kinky world of "rubber dolls" when they investigate the murder of a man who was stabbed in an alley.

The CSIs investigate a murder at the Clark County jail after an inmate stumbles upon a body while running away from officers.

The CSI team investigates the bizarre death of a man who was killed not once, but twice.

The CSI's investigation of the victim of an apparent hit and run leads them into the world of aeronautics.

The CSI team reopens a 10-year-old murder/suicide case when the sole survivor claims her accused father was innocent.

The CSI team learns the main suspect in the gig harbor killings is being released from jail due to lack of evidence.

The CSI team investigates a homicide at a convention for people who collect macabre murder memorabilia.

The CSI team investigates the murder of a young victim dressed as a superhero.

The CSI team investigates a death involving a vintage Rolls Royce and a chrome-covered victim.

The CSI team investigates a murder with ties to two teenaged kidnapped girls.

Season 15 ends with a final showdown between the CSIs and the Gig Harbor killer, whose motives are revealed. Meanwhile, Nick Stokes makes a decision that affects the team moving forward.

In the series finale, Grissom and Willows return to help the CSIs solve a catastrophic case that paralyzes all of Las Vegas

Part 2 of 2. The series concludes with Grissom and Willows returning to help the CSIs solve a catastrophic case that paralyzes all of Las Vegas.