''The Proton Displacement'' -- Sheldon (Jim Parsons, right) feels slighted when Professor Proton seeks advice from Leonard instead of him, and he seeks revenge by befriending a rival science TV host, Bill Nye, on THE BIG BANG THEORY, Thursday, Nov. 7 (8:0 Photo

From: Photo Flash: First Look at Bob Newhart's Return to THE BIG BANG THEORY

Bob Newhart makes his return to CBS' THE BIG BANG THEORY on the upcoming episode titled 'The Proton Displacement' - check out a first look below!