CSI Star Cameos A slew of special guest stars have appeared through the years on CSI: Crime Scene Investigation, including Kevin Federline (as in Britney's ex) on a Season 7 episode titled (what else?) "Fannysmackin'." And even Ray Donovan's Liev Schreiber guested as Gil Grissom's (William Petersen) temporary replacement on Season 7.
Other one-offs have included Faye Dunaway (Bonnie and Clyde), Roger Daltrey of The Who (whose song "Who Are You?" opens CSI) and Danny Bonaduce (The Partridge Family).
As the innovative show closes its Las Vegas lab doors after 15 seasons with a two-hour TV movie special on Sunday, September 27, take a trip down memory lane. Here are some other notable guest appearances (Bieber! Ozzy! Wolfgang!), most of whom appeared on later seasons and some of whom ended up in the interrogation room.