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
Pilot (CSI: Crime Scene Investigation) it, then Catherine promises her that she's not going to regret it. Brass discovers that Warrick went behind his back to obtain a warrant and pulls him from his case, leaving Warrick enraged and furious at the news. Brass forces Warrick to shadow Holly. However, Warrick still has to place the bet for Judge Cohen and leaves Holly at the scene alone with a police officer. Unbeknownst to the CSI team, the officer leaves Holly's scene, leaving her to process the scene alone. The suspect returns to the scene and attacks her by pulling out a gun. Meanwhile, Grissom takes