CSI: Crime Scene Investigation (season 7) CSI: Crime Scene Investigation (season 7) The seventh season of "" premiered on CBS on September 21, 2006 and ended May 17, 2007. The series stars William Petersen and Marg Helgenberger. Catherine heads to a small town in Nevada ("Leaving Las Vegas") as Grissom and Sara continue their affair ("Living Doll"), in the seventh season of "CSI". Supervised by Grissom and Willows, the Las Vegas Crime Scene Investigators face both personal and professional challenges as Grissom says goodbye, and new CSI Michael Keppler joins the team ("Sweet Jane"), as they investigate the bizarre, the brutal, and the unprecedented, including a
CSI: Crime Scene Investigation (season 8) CSI: Crime Scene Investigation (season 8) The eighth season of "" premiered on CBS on September 27, 2007 and ended May 15, 2008. The season stars William Petersen and Marg Helgenberger. As the CSIs race to save one of their own ("Dead Doll"), Sara makes a life changing decision ("Goodbye and Good Luck"), and one investigator falls ("For Gedda"), in the eighth season of "CSI". Grissom, Willows and their team investigate a decapitation ("A La Cart"), a demonic possession ("Go to Hell"), the death of a hermaphrodite ("The Case of the Cross-Dressing Carp"), the murder of a slasher actress ("The