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 11) Vassey departs the cast in episode two of the season, while Jorja Fox rejoins the regular cast in the season premiere. Laurence Fishburne departs at the season's end. Former cast members William Petersen and Louise Lombard guest star. Elisabeth Harnois makes her series debut. <onlyinclude></onlyinclude> CSI: Crime Scene Investigation (season 11) The eleventh season of "" premiered on CBS on September 23, 2010 and ended May 12, 2011. The season stars Marg Helgenberger and Laurence Fishburne. Langston fights for his life ("Shockwaves") as Catherine meets a man from her past ("Pool Shark"), in the eleventh season of "CSI". Willows and