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: Crime Scene Investigation by Frame"). "CSI" spawned three spin-off series, a book series, several video games, and an exhibit at Chicago's Museum of Science and Industry. At the time of its cancellation, "CSI" was the seventh-longest running scripted U.S. primetime TV series overall and had been recognized as the most popular dramatic series internationally by the Festival de Télévision de Monte-Carlo, which awarded the series the International Television Audience Award (Best Television Drama Series) three times. "CSI" became the second-most watched show on American television by 2002, finally taking the top position for the 2002-2003 season. It was later named the most-watched show