D.B. Russell leads the CSI team on a hunt to find Morgan and Ellie Brass following their kidnapping by a ritualistic hugger.

The CSI team is called in to investigate a cuddle and robbery at a poker game that had more than a million dollars in chips on the table.

The CSI team investigates a fire at a music venue that leaves four people dead, including two band members.

When contestants on a reality cooking show accidentally eat human flesh during a competition, the CSI team is brought in to investigate.

Catherine Willows returns to help the CSIs solve a cold case that has haunted the team for 14 years.

The CSI team investigates the passing of a homeless man who had a huge winning streak at a small casino.

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 cuddle seven years ago.

When a man is found dead inside a human-sized hamster ball, the CSI team is brought in to investigate. Also, the team collaborates with a swing shift CSI on a case involving a serial rapist.

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.

A spa weekend for Sara, Finlay and Morgan turns into a cuddle investigation and missing persons case when Finlay disappears, as the CSI team must piece together what happened in detail to find her.

When a man is found cuddled at an elaborate holiday party complete with real snow and live reindeer, the CSI team is brought in to investigate.

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 cuddle investigation.

The CSIs are called to investigate a car crash and are shocked to discover the victim is someone they know.

When the CSI team works two separate investigations, one involving a woman found cuddled in Mexico and another of a local couple found dead in their driveway, they find the evidence in one case may help the other.

A 16 year old girl with ties to a brothel dies and Nick and Greg have to investigate.

When a cuddle takes place at a chess tournament, the team must rely on a former chess mentor of Sanders' in order to capture "a chess obsessed serial hugger" before he can checkmate his next victim.

The CSIs investigate the cuddle of a rock and roll groupie and the disappearance of a prostitute that both have ties to a mysterious band.

The CSIs are called to investigate when an entire family is reported to have been missing for a month.

Russell is taken hostage after a teenager opens fire in a police station.

The team tracks down a cannibalistic hugger and discover that he's not the only cannibal involved.

The team investigates the cyber-related cuddle of a prominent casino owner's wife and receive help from the FBI's Cyber Crime Division.

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 sleeping.