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 recruitment and training programs have seen a massive increase in applicants, with a far wider range of people now interested in something previously regarded as a scientific backwater. The ""CSI" effect" is a reference to the alleged phenomenon of "CSI" raising crime victims' and jury members' real-world expectations of forensic science, especially crime-scene investigation and DNA testing. This is said to have changed the way many trials are presented today, in that prosecutors are pressured to deliver more forensic evidence in court. Victims and their families are coming to expect instant answers from showcased techniques such as DNA analysis and