Broadcasting & Cable

(From left) Nina tassler, president, CBS Entertainment; Peter Roth, president, Warner Bros. Television; Bill Prady, cocreator/executive producer, 'The Big Bang Theory;' and 'Big Bang Theory' star Johnny Galecki celebrate the show's 100th episode Dec. 15 at a party at the California Science Center in Los Angeles. (Credit: 2011 Warner Bros. Entertainment)