1. Lunchtime in "The Proton Resurgence" Episode 22 of Season 6
Sheldon and Leonard hire Professor Proton, the host of their favorite childhood TV show, to perform, on THE BIG BANG THEORY, Thursday, May 2nd on the CBS Television Network. Bob Newhart guest stars as Professor Proton. Pictured left to right: Kunal Nayyar, Johnny Galecki, Jim Parsons and Simon Helberg Photo: Michael Yarish/Warner Bros. ©2013 Warner Bros. Television. All Rights Reserved.