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.
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.
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 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.
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 CSIs are brought in to solve the case of a recently murdered student who's photo ends up trending on the internet.
The CSI's resort to old school methods to solve a case, when a child is abducted during a blackout that cripples the city.
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.
Nick helps a car crash victim and amnesiac piece together a brutal crime scene.
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.
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.
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.
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 murder of a retired Army Ranger brings the FBI in on the case, to Russell and Catherine's initial chagrin.
Three new murders related to three unsolved (or incorrectly solved) crimes from the past come back to haunt the CSIs.
The CSI crew is stumped when they discover a disembodied brain at a crime scene where all the other brains are accounted for.
The murder of a popular sideshow performer sends the team behind the scenes at a carnival freak show.
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...
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.
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 brutal slaying of an entire family has the CSI team stumped, particularly when an unlikely candidate comes forward to take responsibility for the killings.
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.