CSI: Crime Scene Investigation (season 5) CSI: Crime Scene Investigation (season 5) The fifth season of "" premiered on CBS on September 23, 2004 and ended May 19, 2005. The series stars William Petersen and Marg Helgenberger. Greg begins his journey from a lab rat to a field mouse, as the Las Vegas Crime Lab faces a personnel overhaul ("Ch-Ch-Changes"), during the fifth season of "CSI". The team's final days together are plagued with more investigations into the insane and the unusual, including the discovery of an "alien" corpse just outside the boundary of Area 51 ("Viva Las Vegas"), a body washed up in a thunderstorm
CSI: Crime Scene Investigation (season 3) who joined the recurring cast in season one, become main cast members this season. <onlyinclude> </onlyinclude> CSI: Crime Scene Investigation (season 3) The third season of "" premiered on CBS on September 26, 2002 and ended May 15, 2003. The series stars William Petersen and Marg Helgenberger. Grissom begins to suffer from hearing loss ("Inside the Box"), as Catherine faces the possibility of losing her daughter ("Lady Heather's Box") during the third season of "CSI". Alongside their team, including Sara Sidle, Warrick Brown, Nick Stokes, and Jim Brass, Willows and Grissom investigate the death of a poker player ("Revenge is