Bob Newhart to Go Head-to-Head with Bill Nye on The Big Bang Theory

It turns out that Professor Proton has a rival!

Bob Newhart will reprise his Emmy-winning role in an upcoming episode of The Big Bang Theory that will also guest-star Bill Nye, CBS announced Wednesday.

How long can The Big Bang Theory go on?

When Professor Proton seeks Leonard’s (Johnny Galecki) help with an experiment…

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