Here's the official guide of The Big Bang Theory season 6 episode 22 "The Proton Resurgence". This episode airs on Thursday, May 2 on CBS.
TV ICON BOB NEWHART GUEST STARS AS SHELDON AND LEONARD’S CHILDHOOD HERO --
- Sheldon and Leonard hire Professor Proton, the host of their favorite childhood TV show, to perform. Also, Howard and Bernadette run into trouble babysitting Raj’s dog.