CSI 4×23: Bloodlines
A casino employee is beaten and raped on her way home from work, but she survives and identifies her attacker. Unfortunately, a DNA test sets him free and Grissom must wrestle with whether evidence can ever lie. Later, Grissom comes to the rescue of a coworker who ends up on the other side of the law
CSI 4×22: No More Bets
Two young men are found murdered after scamming Sam Braun’s casinos. Because of her relationship with Braun, Grissom refuses to allow Catherine to participate in the case, leaving the rest of the team to solve the mystery. One of the suspects is the son of a man who was black-listed for cheating years ago in Sam Braun’s casinos. Sara finds out that Grissom recommended Nick for the promotion that she wanted.
CSI 4×21: Turn of the Screws
A roller coaster runs off its track, leaving six people dead. The CSI team investigates whether this was an accident or foul play. One of the deaths, however, is not what it seems, and this takes the case in an unexpected direction. Meanwhile, Catherine and Warrick investigate the death of a 13-year old girl whose body was dumped unceremoniously outside town.
CSI 4×20: Dead Ringer
Grissom, Catherine and Nick investigate the death of a runner during a competition. Meanwhile Sara and Warrick investigate the death of couple in a hotel room, initially thought to be a murder-suicide. Both cases take place during this ‘cop’ competition , with more than 20.000 attendants (all of them cops). This gives the investigations an interesting turn, as almost all the suspects and all dead people are cops.
CSI 4×19: Bad Words
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. The man was a competitor in a word game tournament.
CSI 4×18: Bad to the Bone
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. The case involves a missing woman, a long dead body and a missing child.
CSI 4×17: XX
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. Catherine leads the investigation and at first believes the woman was escaping, but the evidence increasingly points to murder. Back in town, Warrick probes the death of a gambler who was stabbed multiple times in his brother’s kitchen.
CSI 4×16: Getting Off
Catherine and Sara deal with the death of what at first seems to be a transvestite. Later during autopsy they find out that the make-up he seemed to be wearing was actually facepaint, he was a clown. Grissom, Nick, and Warrick deal with the death of a man in a homeless area. They found out he worked in a recovery center for drug users.
CSI 4×15: Early Rollout
First aired: 2/19/2004 Production Code: 415
The whole team must investigate a crime where a husband and his porn star wife were murdered execution style. Things get personal for Catherine when Grissom talks to her about her evaluation. Brass believes that Sara may have some type of problem.
CSI 4×14: Paper or Plastic
First aired: 2/12/2004 Production Code: 413
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. The entire team has to process the enormous amount of evidence at the scene.






















