CSI

Finlay must deal with a bomb planted in her car, while Russell gets a call from someone claiming to be the Gig Harbor killer. Mark-Paul Gosselaar guest stars as twins Jared Briscoe and Paul Winthrop, and Mark Valley guest stars as Detective Daniel Shaw.

The CSI team investigates a robbery and fatal shooting at a medical marijuana shop.

Sara and Greg are quarantined after responding to a crime scene that's contaminated with a deadly pathogen.

The CSI team suspects foul play when a chemistry teacher's science experiment goes horribly wrong. Guest stars include Marissa Jaret Winokur as Principal Dawn Meadows, Skipp Sudduth as Ed Lusk and Bella Thorne as Hannah Hunt, a student.

Morgan, 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 and all evidence points to the Gig Harbor Killer. Guest stars include Mark-Paul Gosselaar as twins Jared Briscoe and Paul Winthrop, Mark Valley as Detective Daniel Shaw and Patricia Arquette as Avery Ryan.

The CSI team investigates the death of a woman full of alcohol and drugs in a pool at a rehab facility.

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

The CSI team investigates a murder at Clark County jail after an inmate stumbles upon a body while running away from officers.

The CSI team investigates the bizarre death of a man who was killed not once, but twice. Sharon Osbourne guest stars as Elise Massey, the manager of a billiards championship.

The CSI's investigation of the victim of an apparent hit and run leads them into the world of aeronautics.

The CSI team reopens a 10-year-old murder/suicide case when the sole survivor claims her accused father was innocent. Dean McDermott guest stars as Garth Fogel, a suspect in the case.

The CSI team learns the main suspect in the gig harbor killings is being released from jail due to lack of evidence. Guest stars include Mark-Paul Gosselaar as twins Jared Briscoe and Paul Winthrop, and Mark Valley as Detective Daniel Shaw.

The CSI team investigates a homicide at a convention for people who collect macabre murder memorabilia.

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

The CSI team investigates a death involving a vintage Rolls Royce and a chrome-covered victim.

The CSI team investigates a murder with ties to two teenaged kidnapped girls. Lisa Rinna guest stars as Tori Nolan, the wife of the director of the San Diego Crime Lab.

The CSI unit faces the final showdown with the Gig Harbor killer whose motives are finally revealed. Meanwhile, Nick Stokes makes a decision that will affect the entire team moving forward. Guest stars include Mark-Paul Gosselaar as Paul Winthrop, Mark Valley as Detective Daniel Shaw and Eric Roberts as Daniel Larson.

Get caught up on the CBS drama CSI.

Nick Stokes makes a major decision effecting the CSI team moving forward but first the entire team must deal with a final struggle with the Gig Harbor killer whose motivations are finally revealed in the 15th season finale of CSI: CRIME SCENE INVESTIGATION.