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The CSI team investigates a murder at the home of Marta, a "level 5 hoarder" whose home is stacked high with possessions and garbage and more than one dead body.
The CSIs arrive at their favorite diner only to discover a gruesome crime scene with eight dead victims and a lot of questions.
A police officer is killed, and the only living witness is his dog; a predatory divorce attorney is murdered, and the world seems just a little sweeter.
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.
A woman who was pulled over by police is found murdered two miles up the road from the stop. It's not long before Robbins determines that the woman is, genetically speaking, not a woman.
When a runaway sex slave is murdered during a rave in the desert, the detectives have to find the man responsible.
When a dead CSI officer's prints are found at the scene of a bad guy's apparent murder, the team begins to suspect that a "guardian angel" has been acting to protect his loved ones from beyond the grave.
When a TV news reader dies during an on-air power cut, the CSI team must figure out who could have had time to kill her before the lights came back on. Sara contemplates the future of her marriage.
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.
The CSI is on the hunt for the person who killed a pretty young woman, found dead in the desert. Unfortunately, for Greg, the case has personal ramifications.
Langston and Sara investigate the strange case of Iona, a social worker whose own psychological fetish led to her death, while Nick and Brass try to find those responsible for the chilling suicide of a 17 year old girl, a victim of cyber bullying.
The brutal slaying of an entire family has the CSI team stumped, particularly when an unlikely candidate comes forward to take responsibility for the killings.
The murder of a retired Army Ranger brings the FBI in on the case, to Russell and Catherine's initial chagrin.
The CSI unit investigates when Frank, an apparent murder victim, sits up and needs help. But in fact, he's not just a victim, he's also a double murderer, and he coolly hijacks the Medevac helicopter taking him to a hospital...
Jason McCann contacts Nick and says that he's in imminent danger. Langston has a courtroom war of nerves against serial killer Nate Haskell. A bomb tech disarms a bomb attached to Nick's house. But when he accompanies Nick, Catherine and Vartann to a warehouse with multiple booby-traps per square inch, Kip has to really earn his paycheck to find a safe way out for the CSI team.moreless
A sexual sadist walks free after getting a slap on the wrist by the system, and Sara makes it her personal crusade to put the woman back behind bars.
The CSI crew investigate the murder of a con man who's been selling counterfeit bottles of a rare wine for millions of dollars; Mac shows up from NY for a romantic weekend with Christine, who appears to have vanished from her hotel room, which is the scene of a crime...
David Phillips discovers the dead body of the most popular girl in his class at their 15-year class reunion.
A crazy, chaotic shoot-out on a hotel tram leaves two dead, almost no witnesses, and a lot of contradictory evidence; another dead man in Panaca County has a young man's face and an old man's body.
Picking up where last season ended, D.B. Russell's granddaughter has been kidnapped. In this 13th season premiere, watch as he leads the CSI team on a dangerous hunt to discover her whereabouts and attempt to rescue her.
The CSI's attend the gala grand opening of a mob museum, only to witness an attempted hit on mob lawyer and former mayor Oscar Goodman.
The murder of a popular sideshow performer sends the team behind the scenes at a carnival freak show.
Three new murders related to three unsolved (or incorrectly solved) crimes from the past come back to haunt the CSIs.
The CSIs investigate a triple homicide, and D.B. needs to find a way to connect with a 6-year-old girl who is the only witness and survivor.
The CSI's investigate a series of murders, as one of their own goes on a dangerous undercover mission to get close to the killer.
When a small executive jet crash lands a mile off the Strip, the CSIs wonder if it was intended as an act of terror, and to solve the case, Sara teams up with a former colleague from San Francisco with whom she still has sparks.
When a star tennis player is found beaten and stabbed to death after winning an important match, the CSI team must figure out who from her past and present might have had reason to kill her.
The team must solve a series of grisly murders surrounding the world of high stakes poker before the killer plays the final card.
When the CSIs agree to help out the Las Vegas Police Department's Mobile Crime Unit, they're quickly stuck with a rogues' gallery of bizarre street criminals -- and one dead body, with more to follow.
Sara, Finlay and Morgan's spa weekend turns into a murder investigation/missing persons case when Finlay goes missing, the CSI team figure out what happened in detail in order to find her.
The CSI are called in to investigate the stabbing of a couple found at a motel that and discover two other incidents which occurred in the same room.
When a Sara in crisis is accused of murder, it's race against time and a suspect from the past to clear her name.
Catherine Willows returns to help the CSI's solve a cold case which has haunted the team for the last 14 years.
Catherine's friend Laura's mogul husband Mark has a lot to hide behind his successful international corporation, and he's hired a crack team of assassins to carry out the murders of anyone who might be aware of what he's doing, and that includes Laura's lawyer and Laura herself.
The CSIs find a body near a forest reserve, they discover might be where a serial killer takes his intended victims.
The CSIs start a frenzy of betting pools when it looks like they're about to hit The Cycle: a homicide, suicide, accidental death and natural death during one shift.
The CSI team says goodbye to Catherine Willows as she makes a life-changing decision. Meanwhile, in an attempt to catch Laura's husband and his crack team of assassins, D.B. Russell decides to send a message - by faking Catherine's death.
The Coach of the West Las Vegas University basketball team is a difficult, imperious, petty tyrant with a complicated personal life -- and when he's found bludgeoned to death in his locker room, Detective Russell's son Charlie is the prime suspect.
D.B. Russell leads the CSI team to locate both Morgan and Ellie Brass following their kidnapping.
The CSI's investigates a murder of a homeless man who was found dead after a winning streak at a Casino.
When a man's dead body turns up naked in the bed of Doc Robbins' wife, the detectives try to "just work the scene" without bringing their pre-judgments to the table, but it sure looks like a case of Death During Adultery.
The CSI's investigate a spiritual retreat when a body is found floating in a mud bath. Hodges questions his marriage plans to Elisabetta
The CSI team investigates three dead bodies that were found several blocks away from where a campaign dinner is taking place, after concluding who they think the killer is they make a shocking discovery.
Immediately after a major poker win at a hotel casino, the poker room lights go out and the casino is robbed of over a million dollars in chips.
When the decomposed bodies of eight young women appear in a newly made mass grave in the Nevada desert, Finley quickly realizes that one of the women--and presumably the other seven--is a victim of her long-time nemesis, Seattle serial killer Tom Cooley.
The CSI team investigates when a man is found dead inside a human-sized hamster ball.
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.
The CSI team investigates a fire at a club venue which killed 4 people, including two band members..
The CSIs investigate a car crash and are shocked to discover the victim is someone that they know.
The CSI team is brought in to investigate when a man is found murdered at an elaborate holiday party.
The Crime Scene crew investigates the gruesome murder of a high-powered, widowed lawyer, while Ray faces that it is time to move on from his old life.
The CSI's investigate when the sister of a Cuban singer is murdered and Hodges starts to get cold feet.
The CSI's resort to old school methods to solve a case, when a child is abducted during a blackout that cripples the city.
Nick and Greg investigate the death of a 16-year-old girl with ties to a brothel.
The CSI's team investigates the murder of a ghost hunter.
The CSI crew is stumped when they discover a disembodied brain at a crime scene where all the other brains are accounted for.
The CSI team investigates a series of murders by a serial killer who seems to be recreating a particular woman with the corpses of the women he kills.
Nick helps a car crash victim and amnesiac piece together a brutal crime scene.
When a house is stolen completely off its foundation, The CSIs are on the case in search of answers; new CSI Julie Finlay showcases her skill in blood analysis.
Russell is taken hostage after a teenager opens fire in a police station.
The CSI team is called in to investigate a robbery-homicide at an "Alice In Wonderland" themed wedding. Hodges' mother Olivia arrives for a visit, and he wants her to believe he and Morgan are a couple.
The CSI team is brought in to investigate a reality cooking show when contestants accidentally eat human flesh during a competition.
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 CSI's are called in to investigate a murder of a man at a local casino, they close the entire building in order to find the killer.
When Stokes learns a violent man he helped put in prison is going to have his conviction overturned, the CSIs race to find evidence to prove that he's guilty or else he's going to be released.
The CSIs investigate the murders of an Elvis impersonator and a bird that are somewhat connected.
The CSIs are brought in to solve the case of a recently murdered student who's photo ends up trending on the internet.
The team investigates two apparent corpses who aren't exactly dead at all.
Nick and Greg have a barn full of scattered body parts to piece together - without names or heads to identify them. Langston's old nemesis, Nate Haskell, is back in action and playing his usual game of five-level chess against the LVPD.
The CSI team is called in to investigate a bomb suddenly going off, killing a racing truck driver while he's in the middle of a race.
Langston becomes more determined than ever to track down Nate 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.
Ray Langston fights for his life after being stabbed by psychopath Nate Haskell, while the other CSIs try to catch an anti-government bomber who is responsible for a series of explosions at a funeral that they attended.