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 time-consuming. Additionally, it is inappropriate for the CSIs who process a crime scene to be involved in the examination and testing of any evidence collected from that scene. "CSI" shares this characteristic with similar British drama series "Silent Witness". However, not all law enforcement agencies have been as critical; many CSIs have responded positively to the show's influence and enjoy their new reputation. In the UK, scenes of crime officers now commonly refer to themselves as CSIs. Some constabularies, such as Norfolk, have even gone so far as to change the name of the unit to Crime Scene Investigation. Also,