8.0/10888 votes#1 - Assume Nothing (1)
Season 4 Episode 1 - Aired 9/24/2003
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. The case is complicated by leaks to the press and a judge reluctant to issue a warrant. Catherine gets some troubling news about her father's murder trial.
Director: Richard J. Lewis
Writer: Danny Cannon, Anthony E. Zuiker
8.0/10883 votes#2 - All for Our Country (2)
Season 4 Episode 2 - Aired 10/1/2003
When the lead suspects in Grissom's serial killer case are murdered, Grissom suspects an inside job. Grissom and Brass are at odds when Grissom suggests it was a cop. Catherine and Sara investigate what happened to a college football fan when his bloated body is found in a bathtub.
Director: Richard J. Lewis
Writer: N/A
8.0/10851 votes#3 - Homebodies
Season 4 Episode 3 - Aired 10/8/2003
Grissom and Warrick get the case of an old woman found mummified in her closet. Sarah and Nick arrive to investigate a breaking and entering to find a raped teen. These cases are not as disparate as they first seem. Catherine looks into a gun found by a boy. The gun is connected to a week old murder across town that Warrick caught.
Director: Kenneth Fink
Writer: Sarah Goldfinger, Naren Shankar
7.6/10823 votes#4 - Feeling the Heat
Season 4 Episode 4 - Aired 10/22/2003
During Vegas's latest Heat wave of triple digit temperatures, Gil and Catherine investigate a baby locked in a car. Warrick investigates a man dead of an apparent heat stroke in his house. Nick and Sarah investigate a woman's body found floating in the lake with a blow to the head.
Director: Kenneth Fink
Writer: Eli Talbert, Anthony E. Zuiker
7.6/10939 votes#5 - Fur and Loathing
Season 4 Episode 5 - Aired 10/29/2003
The team is introduced to the ""Furry"" side of Vegas when a man is found dead on the side of the road, dressed in a racoon suit. Elsewhere in Vegas, a gunshot victim is found in a deep-freezer, frozen solid.
Director: Richard J. Lewis
Writer: Jerry Stahl
8.4/10958 votes#6 - Jackpot
Season 4 Episode 6 - Aired 11/5/2003
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. Catherine gets an unexpected gift from her father.
Director: Danny Cannon
Writer: Carol Mendelsohn, Naren Shankar
8.2/10852 votes#7 - Invisible Evidence
Season 4 Episode 7 - Aired 11/12/2003
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. Grissom and the team have 24 hours to make the case with new evidence or the killer will go free.
Director: Danny Cannon
Writer: Josh Berman
7.7/10815 votes#8 - After the Show
Season 4 Episode 8 - Aired 11/19/2003
A suspect's infatuation with Catherine results in her taking over a high profile case. The case is a missing woman who aspired to be a showgirl. Sara and Nick are angered since it takes the career making case away from them.
Director: Kenneth Fink
Writer: Andrew Lipsitz, Elizabeth Devine
7.6/10809 votes#9 - Grissom Versus the Volcano
Season 4 Episode 9 - Aired 12/10/2003
The sheriff is under political pressure to find who killed an air marshall with a car bomb that the sheriff witnessed. Grissom, Catherine and Nick are pressured to produce results. Warrick and Sarah try to find the murderer of the wife of a singer who headlines on the strip.
Director: Richard J. Lewis
Writer: N/A
7.7/10799 votes#10 - Coming of Rage
Season 4 Episode 10 - Aired 12/17/2003
A teenager is found murdered on a construction site. Grissom, Sarah, 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.
Director: Nelson McCormick
Writer: N/A
7.6/10822 votes#11 - Eleven Angry Jurors
Season 4 Episode 11 - Aired 1/8/2004
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. Nick reopens a four year old case when the sister of the victim comes forward with new evidence.
Director: Matt Earl Beesley
Writer: Josh Berman, Andrew Lipsitz
8.2/10946 votes#12 - Butterflied
Season 4 Episode 12 - Aired 1/15/2004
A woman found murdered in her home. Her resemblance to Sara causes Grissom to take a personal interest in the case and forces him to examine the decisions he has made in his life.
Director: Richard J. Lewis
Writer: David Rambo
7.6/10824 votes#13 - Suckers
Season 4 Episode 13 - Aired 2/5/2004
Three little CSIs (Grissom, Sara, and Nick)respond to an electrocution at a casino. The casino is hosting Japanese antiquities. The electroctution is just a ruse to steal the central piece of the exhibit. Catherine and Warrick deal with a vampire murder.
Director: Danny Cannon
Writer: Danny Cannon, Josh Berman
7.7/10812 votes#14 - Paper or Plastic
Season 4 Episode 14 - Aired 2/12/2004
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. The entire team has to process the enormous amount of evidence at the scene.
Director: Kenneth Fink
Writer: Naren Shankar
7.6/10817 votes#15 - Early Rollout
Season 4 Episode 15 - Aired 2/19/2004
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.
Director: Duane Clark
Writer: N/A
7.3/10784 votes#16 - Getting Off
Season 4 Episode 16 - Aired 2/26/2004
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.
Director: Kenneth Fink
Writer: Jerry Stahl
7.7/10813 votes#17 - XX
Season 4 Episode 17 - Aired 3/4/2004
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. 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.
Director: Deran Sarafian
Writer: Ethlie Ann Vare
8.0/10831 votes#18 - Bad to the Bone
Season 4 Episode 18 - Aired 4/1/2004
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. The case involves a missing woman, a long dead body and a missing child.
Director: David Grossman
Writer: Eli Talbert
7.6/10777 votes#19 - Bad Words
Season 4 Episode 19 - Aired 4/15/2004
Warrick, Catherine, and Nick try to determine the cause of a house fire that kills a teenage kill. 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.
Director: Rob Bailey
Writer: Sarah Goldfinger
7.4/10763 votes#20 - Dead Ringer
Season 4 Episode 20 - Aired 4/29/2004
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.
Director: Kenneth Fink
Writer: Elizabeth Devine
7.8/10819 votes#21 - Turn of the Screws
Season 4 Episode 21 - Aired 5/6/2004
A roller coaster runs off track leaving 6 people dead. The CSI team must uncover whether this was an accident, or foul play. Warrick and Catherine try to find the killer of a 13 year old girl.
Director: Deran Sarafian
Writer: N/A
7.6/10757 votes#22 - No More Bets
Season 4 Episode 22 - Aired 5/13/2004
Two men are found murdered after scamming Sam Braun's casinos. Grissom and Warrick investigate after Catherine is thrown off the case. One of the suspects is the son of a man Braun caught cheating. Nick gets the promotion that Sara coveted.
Director: Richard J. Lewis
Writer: N/A
8.4/10888 votes#23 - Bloodlines
Season 4 Episode 23 - Aired 5/20/2004
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
Director: Kenneth Fink
Writer: N/A
The Best Episodes of CSI: Crime Scene Investigation Season 4
Every episode of CSI: Crime Scene Investigation Season 4 ranked from best to worst. Discover the Best Episodes of CSI: Crime Scene Investigation Season 4!
A Las Vegas team of forensic investigators are trained to solve criminal cases by scouring the crime scene, collecting irrefutable evidence and finding the missing...
Genres:CrimeDramaMystery
Network:CBS
Season 4 Ratings Summary
"Assume Nothing (1)" is the best rated episode of "CSI: Crime Scene Investigation" season 4. It scored 8/10 based on 888 votes. Directed by Richard J. Lewis and written by Danny Cannon, Anthony E. Zuiker, it aired on 9/24/2003. This episode is rated 0.0 points higher than the second-best, "All for Our Country (2)".