Professor Proton returns!
In tonight's all-new episode of The Big Bang Theory, the one and only Bob Newhart returns for his fifth guest appearance on the smash CBS comedy -- and only ET has the behind-the-scenes scoop straight from the 88-year-old legend.
"It's just great coming back," Newhart��dished to our cameras when we recently stopped by the set of The Big Bang Theory's 11th��season.
We were delighted to see that Newhart was once again dressed as Sheldon's spiritual guide -- a combination of Obi-Wan Kenobi and Professor Proton -- but apparently those robes are not as comfy as they look! "You love it, but I don't love it," Newhart joked.
When asked what it's like to share scenes with Newhart, Big Bang's leading man,��Jim Parsons,��was quick with his response. "It is really, really unpredictable in a really good way," Parsons said with a smile.��"I mean, like, he is solid.��I love it. He is so great."
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So what keeps Newhart coming back to The Big Bang Theory time after time? "It's good writing," Newhart replied. "I��knew it was going to be good writing and that's, I think, kind of��hard to find these days."
"[And] it's��done in front of a live audience, which [is what] I��always did for my shows," he added. Plus, let's not forget that Newhart won his very first Emmy for Outstanding Guest Actor in a Comedy back in 2013 after his first appearance on Big Bang.��
As for the rest of the items on Newhart's career bucket list? "Well, the presidency," he joked. "I'm 88, so if I didn't work out, I'd only be 92 [after the first term] and they could find another guy."
Bob Newhart 2020!
Catch Newhart's hilarious guest role on The Big Bang Theory tonight at 8 p.m. ET/PT on CBS.