Season 15

Episode Guide

The CSI Effect

S15 E1
Sep 28, 2014
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.

Buzz Kill

S15 E2
Oct 05, 2014
The CSI team investigates a robbery and fatal shooting at a medical marijuana shop.

Bad Blood

S15 E3
Oct 12, 2014
Sara and Greg are quarantined after responding to a crime scene that's contaminated with a deadly pathogen.

The Book of Shadows

S15 E4
Oct 19, 2014
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.

Girls Gone Wilder

S15 E5
Nov 09, 2014
Morgan, Sidle and Finlay try to relax at a forensics conference when a mass shooting occurs on site.

The Twin Paradox

S15 E6
Nov 16, 2014
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.

Road To Recovery

S15 E7
Nov 23, 2014
The CSI team investigates the death of a woman full of alcohol and drugs in a pool at a rehab facility.

Rubbery Homicide

S15 E8
Nov 30, 2014
The CSI team delves into the kinky world of "rubber dolls" when they investigate the murder of a man stabbed in an alley.

Let's Make a Deal

S15 E9
Dec 07, 2014
The CSI team investigates a murder at Clark County jail after an inmate stumbles upon a body while running away from officers.

Dead Rails

S15 E10
Dec 14, 2014
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.

Angle of Attack

S15 E11
Dec 21, 2014
The CSI's investigation of the victim of an apparent hit and run leads them into the world of aeronautics.

Dead Woods

S15 E12
Dec 28, 2014
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 Greater Good

S15 E13
Jan 04, 2015
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.

Merchants of Menace

S15 E14
Jan 25, 2015
The CSI team investigates a homicide at a convention for people who collect macabre murder memorabilia.

Hero To Zero

S15 E15
Jan 25, 2015
The CSI team investigates the murder of a young victim dressed as a superhero.

The Last Ride

S15 E16
Jan 27, 2015
The CSI team investigates a death involving a vintage Rolls Royce and a chrome-covered victim.

Under My Skin

S15 E17
Feb 15, 2015
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 End Game

S15 E18
Feb 15, 2015
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.