Bob Newhart will be returning to his EMMY winning role of Arthur Jeffries/Prof. Proton on the Thursday, November 2nd episode of The Big Bang Theory. Sheldon's very own Obi Wan, returns to him in another time of need. Wil Wheaton will also reprise his role in the episode as Sheldon's on and off again nemesis.

The Big Bang Theory airs Mondays at 8 p.m. on CBS before moving to its regular night of Thursdays at 8 p.m. on November 2nd.

Bob Newhart was nearly 30 years-old and working as an accountant in Chicago, when he struck comic gold with his first comedy album.

His incredible journey was thoroughly explored in AMERICAN MASTERS Bob Newhart: Unbuttoned on PBS.

More recently, Newhart's TV contributions have been highlighted on PBS' popular series, "Pioneers of Television."

His career as an entertainer has spanned 56 years, including multiple television series, 14 feature films and millions of albums sold worldwide and he is the recipient of many honors, including the "Mark Twain Prize for American Humor," presented by the Kennedy Center, He and induction into the Academy of Television Arts and Sciences' "Hall of Fame."

In 2013, he won his first Emmy® for recurring appearances on the hit show "Big Bang Theory" and he also appears in the series, "The Librarians," on TNT.