CSI: Crime Scene Investigation (season 4) CSI: Crime Scene Investigation (season 4) The fourth season of "" 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"),
CSI: NY CSI: NY CSI: NY (Crime Scene Investigation: New York, stylized as CSI: NY/) is an American police procedural television series that ran on CBS from September 22, 2004, to February 22, 2013, for a total of nine seasons and 197 original episodes. The show follows the investigations of a team of NYPD forensic scientists and police officers identified as "Crime Scene Investigators" (instead of the actual title of "Crime Scene Unit Forensic Technicians" (CSU)) as they unveil the circumstances behind mysterious and unusual deaths, as well as other crimes. The series is an indirect spin-off from the veteran series ""