CSI: Crime Scene Investigation (season 7) chainsaw massacre ("Toe Tags"), a death at a church ("Double-Cross"), a kidnapping ("Burn Out"), a series of miniature killings ("Post Mortem"), the death of identical twins ("Happenstance"), and the return of a 1970s Mob Boss to Vegas ("Living Legend"). Meanwhile, Catherine faces the loss of her father ("Built to Kill"), Greg is assaulted ("Fannysmackin'"), Keppler faces his past ("Law of Gravity"), and the team attempt to hide their amusement when a man is found trapped in concrete ("Loco Motives"). Louise Lombard joins the main cast, and departs at the season's end. <onlyinclude></onlyinclude> CSI: Crime Scene Investigation (season 7) The seventh
CSI: Crime Scene Investigation (season 12) first and only episode of the "CSI" franchise episode not to feature a female lead. <onlyinclude></onlyinclude> CSI: Crime Scene Investigation (season 12) The twelfth season of "" premiered on CBS on September 21, 2011, and ended on May 9, 2012. The series stars Marg Helgenberger, Ted Danson and Elisabeth Shue. The show was moved to Wednesdays at 10:00 p.m. (P/E), following "Criminal Minds". Catherine and Nick adjust to life working under D.B. Russell, following their demotions, while Morgan Brody joins the CSI team ("73 Seconds"), in the twelfth season of "CSI". This season, the team investigate crimes including the murder