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.
The CSI's team investigates the murder of a ghost hunter.
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 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 CSIs find a body near a forest reserve, they discover might be where a serial killer takes his intended victims.
David Phillips discovers the dead body of the most popular girl in his class at their 15-year class reunion.
The team must solve a series of grisly murders surrounding the world of high stakes poker before the killer plays the final card.
When a Sara in crisis is accused of murder, it's race against time and a suspect from the past to clear her name.
The CSI's investigate when the sister of a Cuban singer is murdered and Hodges starts to get cold feet.
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...
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.
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.
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 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.
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.
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.
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.
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.
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.
When a runaway sex slave is murdered during a rave in the desert, the detectives have to find the man responsible.
The CSIs arrive at their favorite diner only to discover a gruesome crime scene with eight dead victims and a lot of questions.
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.