CSI: Crime Scene Investigation physical evidence to solve murders. The team is originally led by Gil Grissom (Petersen), a socially awkward forensic entomologist and career criminalist who is promoted to CSI supervisor following the death of a trainee investigator. Grissom's second-in-command, Catherine Willows (Marg Helgenberger), is a single mother with a cop's instinct. Born and raised in Las Vegas, Catherine was a stripper before being recruited into law enforcement and training as a blood-spatter specialist. Following Grissom's departure during the ninth season of the series, Catherine is promoted to supervisor. After overseeing the training of new investigator Raymond Langston (Fishburne), Willows is replaced by
CSI: Crime Scene Investigation (season 6) a suburban home ("Bite Me"), a mass suicide at a cult ("Shooting Stars"), and an apparent suicide ("Secrets and Flies"), as Nick comes to terms with his PTSD ("Bodies in Motion"), and later tracks down a missing child ("Gum Drops"). Also this season, Greg hunts the head of a civil war reenactor ("Way to Go"), Grissom investigates the death of a psychic ("Spellbound"), and Sara comes face to face with her toughest adversary yet ("The Unusual Suspect"). <onlyinclude></onlyinclude> CSI: Crime Scene Investigation (season 6) The sixth season of "" premiered on CBS on September 22, 2005 and ended May 18,