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.
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 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.
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.
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 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 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.