Bob Newhart - IMDb
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Bob Newhart - Wikipedia
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Bob Newhart, aka 'Professor Proton,' bids farewell to 'Big Bang Theory'
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The Big Bang Theory
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Bob Newhart - Wikipedia
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Bob Newhart - IMDb
Big Bang Theory': Bob Newhart Returning in Final Season 12 as Proton | TVLine
How The Big Bang Theory Landed Bob Newhart As Professor Proton | Cinemablend
