Bob Newhart to Make Sitcom Return on The Big Bang Theory

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The Big Bang Theory will soon welcome a television legend.

Six-time Emmy Award winner Bob Newhart has signed on to portray Professor Proteon, the former host of Sheldon's favorite science series from many years ago.

Bob Newhart Pic

Show sources tell TV Line that Sheldon will track down Newhart's character online and learn that he's available for parties and events. Naturally, he therefore invites to "professor" over to his home.

The Big Bang Theory Season 6 is off for the next two weeks, while this episode will air on May 2.

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.

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TBBT Quotes

Stephen Hawking: You made an arithmetic mistake on page two. It was quite a boner.
Sheldon: No, no ... that can't be right. I-I don't make arithmetic mistakes.
Stephen Hawking: Are you saying I do?
Sheldon: Oh, no, no, no, of course not. It's just, I was thinking.... Oh, gosh, golly, I made a boo-boo and I gave it to Stephen Hawking.
Stephen Hawking: Great, another fainter.

Sheldon: Why do you have the Chinese character for "soup" tattooed on your right buttock?
Penny: It's not "soup," it's "courage."
Sheldon: No it isn't. But I suppose it does take courage to demonstrate that kind of commitment to soup.
Penny: How'd you see it? You said you wouldn't look.
Sheldon: Sorry. As I told you, the hero always peeks.