VIDEO: Sneak Peek - Bob Newhart Guests on CBS's BIG BANG THEORY

On the next episode of CBS's THE BIG BANG THEORY titled 'The Proton Resurgence,' 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. The episode airs Thursday, May 2 (8:00 – 8:31 PM, ET/PT) on the CBS Television Network. Bob Newhart guest stars as Professor Proton. Get a sneak peek below!

Leonard and Sheldon are brilliant physicists – wizards in the laboratory, but socially inept outside of it.  Enter beautiful, free-spirited neighbor, Penny, who aims to teach them a thing or two about life.  While Leonard spends his days looking for love, Sheldon is quite content video-chatting with platonic partner Amy Farrah Fowler, or playing Star Trek 3D Chess with their ever-expanding universe of friends, including fellow scientists Koothrappali and Wolowitz, and Wolowitz' new wife, the adorable microbiologist Bernadette.

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