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"),
Kitty (CSI: Crime Scene Investigation) Kitty (CSI: Crime Scene Investigation) "Kitty" is an episode of . Kitty introduced FBI Agent Avery Ryan from which this episode served as the backdoor pilot of the series. Despite being credited Jorja Fox and Jon Wellner who portray Sara Sidle and Henry Andrews do not appear in this episode (although the latter does appear in a deleted scene). The episode begins with a house's security system being disabled. Then a dark figure walks into a bedroom and murders the woman in the bedroom. The scene cuts to Jim Brass (Paul Guilfoyle) yelling orders at the police officers and trying