Sneak Peek: Bob Newhart Guest Stars on ‘The Big Bang Theory’

by | May 2, 2013 at 9:43 AM | The Big Bang Theory

Sitcom legend Bob Newhart guest stars on tonight’s episode of “The Big Bang Theory,” where he gets Sheldon’s panties all in a bunch.

In the episode, Newhart plays Professor Proton, the host of Sheldon (Jim Parsons) and Leonard’s (Johnny Galecki) favorite childhood TV show, whom the guys hire to perform.

When the mad professor first meets Sheldon — who seems to be his biggest fan ever — Newhart wonders aloud: “Is he dangerous?” “No, he’s a genius,” Leonard responds. “That doesn’t answer my question,” Newhart says with his trademark deadpan delivery.

Watch a Sneak Peek Below

“The Big Bang Theory” airs Thursdays at 8/7c on CBS.