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"The Big Bang Theory" -- "The Proton Resurgence"

"The Proton Resurgence" -- Sheldon (Jim Parsons, right) and Leonard hire Professor Proton (Guest Star Bob Newhart, left), the host of their favorite childhood TV show, to perform, on THE BIG BANG THEORY, Thursday, May 2 (8:00 - 8:31 PM, ET/PT) on the CBS Television Network.