CSI: Crime Scene Investigation: Season 15

Russell and Finlay must confront a serial killer case from their past while working in Seattle when a copycat killer suddenly emerges in Las Vegas.

The family of a medical marijuana dispenser is held hostage, but the job of finding the kidnappers becomes harder after the best potential witness is killed by the dispensery's security guard.

CDC may be dealing with a potential deadly virus outbreak in Las Vegas, and Sara and Greg may have been exposed to the virus while investigating a crime scene.

While investigating the death of a high school chemistry teacher, CSI discovers that he belonged to a secret wiccan society.

Brody, Sidle and Finlay try to relax at a forensics conference when a mass shooting occurs on site.

Frustration mounts for the CSI team as another victim surfaces who is linked to the Gig Harbor killer.

A woman in rehab at a posh Las Vegas facility is killed, and everybody at the facility is under suspicion.

The CSI team delves into the world of "rubber dolls" when they investigate the murder of a man stabbed to death in an alley.

The team discovers that a murdered prisoner who was informing from the inside to the police had a second job informing for the Feds.

An ex-con buried alive in the desert is killed after being hit by a car. The CSI investigation takes them into the world of pool, high-stakes hustling, and prostitution.

The team discovers that a mysterious homicide was caused by a man in a wingsuit, who is also found dead the next day.

Sara reopens a 10-year-old family murder/suicide case when the lone surviving daughter claims to have a new memory about that fateful evening that proves that the father didn't do it.

D.B. makes the risky decision to use his daughter as bait to catch the Gig Harbor Killer, and discovers the shocking identity of the killer's partner.

The investigation of a dead body found in a car that once belonged to a serial killer takes the detectives into the twisted business of "murderabilia."

The CSI team investigates the murder of a young victim dressed as a superhero.

A young woman is found dead, covered from head to toe in silver paint, (à la Goldfinger).

The CSIs investigate a murder linked to the kidnapping of the teenage daughters of the head of another crime lab.

A final showdown between the CSIs and the Gig Harbor Killer, whose motives are revealed. Meanwhile, Nick Stokes makes a decision that affects the team moving forward.