"The Convention Conundrum" is the 14th episode of the seventh season of the U.S. sitcom The Big Bang Theory and the 149th episode of the show overall. It first aired on CBS on January 30, 2014.The episode features guest appearances by James Earl Jones and Carrie Fisher. In contrast to previous guest stars, James Earl Jones takes a liking to Sheldon (Jim Parsons) and the main plot is focused on the two having a night out together.