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 8) main cast member in a starring role. Wallace Langham joined the main cast. Only 11 episodes had been completed and aired before the 2007 Writers Guild of America strike. Only six more episodes were made after the strike, for a total of only 17 episodes. Some international broadcasters only showed the first part of the crossover "Who and What" because "Without a Trace" did not air (or aired older seasons) at the time. <onlyinclude></onlyinclude> 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