CSI: Crime Scene Investigation (season 4)

CSI: Crime Scene Investigation (season 4)
Season 4 U.S. DVD cover
Starring	William Petersen Marg Helgenberger Gary Dourdan George Eads Jorja Fox Eric Szmanda Robert David Hall Paul Guilfoyle
Country of origin	United States
No. of episodes	23
Release
Original network	CBS
Original release	September 25, 2003 (2003-09-25) – May 20, 2004 (2004-05-20)
Season chronology
← Previous Season 3 Next → Season 5
List of CSI: Crime Scene Investigation episodes

The fourth season of CSI: Crime Scene Investigation premiered on CBS on September 25, 2003 and ended May 20, 2004. The series stars William Petersen and Marg Helgenberger.

Nick accidentally leaks information to a news reporter ("Assume Nothing"), and Catherine tries to discover how a body ended up in a bathtub ("All for Our Country") during the fourth season of CSI. Supervised by Grissom and Willows, the Las Vegas CSIs are tasked with investigating the bizarre, the unlikely, and the unprecedented, including a disappearing gun ("Homebodies"), the death of a baby during a heatwave ("Feeling the Heat"), a case of raccoon versus big rig ("Fur and Loathing"), a car-bombing ("Grissom Versus the Volcano"), and the derailment of a roller-coaster ("Turn of the Screws"). Meanwhile, Catherine usurps a case from Nick and Sara ("After the Show"), the team have to re-investigate a rape-murder ("Invisible Evidence"), Grissom heads to Jackpot, Nevada ("Jackpot"), and team take part in a CSI relay, bringing together investigative teams from across America ("Dead Ringer").