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!

In the episode, Sheldon 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. Meanwhile, Raj gets jealous when Howard crashes "girls' night," on THE BIG BANG THEORY, Thursday, Nov. 7 (8:00 - 8:31 PM, ET/PT) on CBS.

Photos: Monty Britnon/CBS

Johnny Galecki, Mayim Bialik, Jim Parsons and Bob Newhart

Mayim Bialik and Jim Parsons

Kaley Cuoco, Simon Helberg, Melissa Rauch and Mayim Bialik

Bill Nye, Johnny Galecki, Bob Newhart

Bill Nye, Johnny Galecki, Bob Newhart

Bob Newhart and Kaley Cuoco

Bob Newhart

Johnny Galecki, Bob Newhart

Kaley Cuoco

Jim Parsons, Bill Nye, Bob Newhart and Johnny Galecki