Episode 1
D.B. Russell leads the CSI team on a hunt to find Morgan and Ellie Brass following their kidnapping by a ritualistic killer.
Episode 2
The CSI team investigate a murder at a high stakes poker game.
Episode 3
The CSI team investigates a fire at a music venue that leaves four people dead, including two band members.
Episode 4
When contestants on a reality cooking show accidentally eat human flesh during a competition, the CSI team is brought in to investigate.
Episode 5
The team meets a blast from the past, with a chance to solve a cold case that has haunted the team for 14 years.
Episode 6
The CSI team investigates the death of a homeless man who had a huge winning streak at a small casino.
Episode 7
A body is discovered during torrential rain in Vegas; Sanders is accused of framing a man for murder seven years ago.
Episode 8
A dead man is found inside a human-size hamster ball; the team collaborates on a serial rapist investigation.
Episode 9
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.
Episode 10
A 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.
Episode 11
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.
Episode 12
An inbound plane’s passengers become the victims of an onboard thief, but when one of the passengers is found dead, the petty crime turns into a murder investigation.
Episode 13
The CSIs are shocked when they discover that a victim in a car crash is someone they are familiar with.
Episode 14
When a woman is found dead in Mexico and a murdered couple is discovered in a driveway, evidence from one investigation could help the other.
Episode 15
Greg and Nick investigate the death of a 16-year-old girl with ties to a brothel.
Episode 16
A murdered Elvis impersonator has a strange connection with a bird.
Episode 17
A murdered groupie and a missing prostitute both have connections to a mysterious band.
Episode 18
The team investigates when a whole family is reported to have been missing for a month.
Episode 19
When a teen opens fire in a police station, Russell is taken hostage.
Episode 20
As the CSIs hunt a cannibalistic killer, they realize there is more than one.
Episode 21
The team investigates the cyber-related murder of a prominent casino owner's wife and receive help from the FBI's Cyber Crime Division.
Episode 22
The CSIs investigate a crime that has ties to a 25-year-old mob heist; Brass is faced with a decision when his daughter tries to commit suicide.