THURSDAY, OCT. 12: Kevin Federline connects with his inner thespian on an episode of C.S.I.: Crime Scene Investigation (CBS, 9 p.m. ET) called – wait for it – Fannysmackin.' Britney's husband plays a thuggish teen who hassles the investigators as they work – and, no, not by playing them his song "PopoZao." "It was pretty easy," he tells PEOPLE about his acting debut. "The words just fit in your mouth, you could just run with it." 'Nuff said.