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 City discover that Monica was receiving unwanted attention from both the hotel waiter, Blake who also moonlights in the hotel spa and Pierre, another hotel guest who had shared drinks and made an unwanted play for Monica on the night of her murder. Upon further investigation CSI discover that Blake seemed to be following Monica around even swapping shifts with a colleague at the spa so that he could 'give it his best shot' with Monica and Pierre who had checked out of the hotel in a hurry leaving behind his expensive but smashed watch at the scene of the crime.