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
Pilot (CSI: Crime Scene Investigation) introduces herself to Gil Grissom, who is the assistant supervisor of the graveyard shift. Grissom then asks her for a pint of blood and after that, Gribbs officially begins her shift. Nick Stokes and Warrick Brown both realize that they only need to solve one more crime to reach the level of CSI 3. The two eventually agree on a bet of 20 dollars that one of them will be promoted to CSI Level 3 by the end of the night. Catherine Willows jumps out of a car, saying goodbye to her daughter and her sister before rushing into the