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 (season 14) 9, 2014. On March 13, 2014 it was announced that "CSI: Crime Scene Investigation" would return for a fifteenth season, which started airing in September 2014. D.B. and Finn lead the hunt for Morgan, while Brody makes a shocking discovery that endangers her own life ("The Devil and D.B. Russell"), in the fourteenth season of "CSI". Also this season the team investigate the unusual, the brutal, and the life-changing, including a casino heist ("Take the Money and Run"), a night-club fire ("Torch Song"), a contact lens discovered on a cookery show ("Last Supper"), a cold case that takes the team,