Season 4

Episode Guide

Assume Nothing

S4 E1
Sep 26, 2003
Two couples meet in a bar and one of the couples is murdered. When a second couple is murdered in a similar fashion the team suspects a pair of serial killers are on the loose.

All For Our Country

S4 E2
Oct 3, 2003
When the lead suspects in Grissom's serial killer case are murdered, Grissom suspects an inside job.


S4 E3
Oct 10, 2003
Grissom and Warrick get the case of an old woman found mummified in her closet. Sara and Nick arrive to investigate a breaking and entering to find a raped teen.

Feeling The Heat

S4 E4
Oct 24, 2003
During Vegas' latest Heat wave of triple digit temperatures, Gil and Catherine investigate a baby locked in a car. Warrick investigates a man's death of an apparent heat stroke in his house. Nick and Sara investigate a woman's body found floating in the lake with a blow to the head.

Fur and Loathing

S4 E5
Oct 31, 2003
Anthony E. Zuiker says, 'My middle son, Evan Jerome Zuiker, identifies with being a 'Furry.' Today, they still identify with this culture which was rooted out of this episode. Who knew 'Nes' or 'Litho' is the CSI creator's son? At this point in our seasonal run, we were looking to do episodes about interesting and provocative world's. Back then, this episode was the culture's 'Fursona.'


S4 E6
Nov 7, 2003
A severed head is shipped to Dr. Robbins from Jackpot, Nevada. Grissom goes to Jackpot to find the rest of the body and gets very little cooperation from the locals.

Invisible Evidence

S4 E7
Nov 14, 2003
Warrick's appearance at the preliminary hearing on a rape and murder case goes terribly wrong when the only piece of evidence is thrown out on a technicality.

After The Show

S4 E8
Nov 21, 2003
A suspect's infatuation with Catherine results in her taking over a high profile case.

Grissom Versus The Volcano

S4 E9
Dec 12, 2003
The sheriff is under political pressure to find who killed an air marshal with a car bomb that the sheriff witnessed.

Coming of Rage

S4 E10
Dec 19, 2003
A teenager is found murdered on a construction site. Grissom, Sara, and Warrick follow the lead of blood on a hammer. Nick, with an assist from Catherine, tries to find how a woman was killed by a gunshot on her lawn when no one nearby had a gun.

Eleven Angry Jurors

S4 E11
Jan 9, 2004
The lone holdout on a jury is found dead in the jury room. The eleven jurors who were voting guilty and who hated the dead juror are the natural suspects.


S4 E12
Jan 16, 2004
Anthony E. Zuiker says, 'Carol Mendelsohn (showrunner) and myself rewrote this script over the course of 16 days. Finding an actress to be Sara Sidle's doppelganger was very hard to cast, but we found her in Errin Hayes who played Debbie Marlin. It was also one of our most heavily processed crime scenes where we purposely deleted a lot of dialogue to let the show play in silence.


S4 E13
Feb 6, 2004
Grissom, Sara, and Nick respond to an electrocution at a casino. The casino is hosting Japanese antiquities. The electrocution is just a ruse to steal the central piece of the exhibit.

Paper or Plastic?

S4 E14
Feb 13, 2004
A robbery at a grocery store results in a shootout leaving five dead. The police officer at the scene believes Grissom has a grudge against him.

Early Rollout

S4 E15
Feb 20, 2004
The whole team must investigate a crime where a husband and his porn star wife were murdered execution style.

Getting Off

S4 E16
Feb 27, 2004
Catherine and Sara deal with the death of what at first seems to be a transvestite.


S4 E17
Mar 12, 2004
A mutilated female body is discovered tied to the undercarriage of a bus carrying prisoners from a women's correctional facility after a severed arm flies out from beneath the vehicle and strikes a car.

Bad To The Bone

S4 E18
Apr 2, 2004
A violent murder in a casino parking garage and another episode in the police interview room lead the CSIs to one shocking discovery after another.

Bad Words

S4 E19
Apr 16, 2004
Warrick, Catherine, and Nick try to determine the cause of a house fire that kills a teenage girl. The fire is in the same neighborhood as a similar arson fire. Grissom and Sara investigate a man found dead with letter tiles in his stomach.

Dead Ringer

S4 E20
Apr 30, 2004
Grissom, Catherine and Nick investigate the death of a runner during a competition. Meanwhile Sara and Warrick investigate the death of a couple in a hotel room, initially thought to be a murder-suicide.

Turn of the Screws

S4 E21
May 7, 2004
A roller coaster runs off its track, leaving six people dead. The CSI team investigates whether this was an accident or foul play.

No More Bets

S4 E22
May 14, 2004
Two young men are found murdered after scamming Sam Braun's casinos.


S4 E23
May 21, 2004
A casino employee is beaten and raped on her way home from work, but she survives and identifies her attacker.