Veteran actor is one of those actors universally beloved in virtually every role he plays. Now, he's set to drop in on Sheldon () and the rest of the gang on an upcoming episode of The Big Bang Theory.
Newhart, star of the long-running shows The Bob Newhart Show and Newhart, will be joining the cast as Professor Photon, the former host of a kids' science show and Sheldon's childhood hero. When Sheldon tracks him down online and discovers that the Professor can be booked for events, he invites him over to their house.
Because it's Sheldon, we can expect the socially clueless physicist to offend Professor Photon a minimum of three times during the course of the show, with Howard () and Raj () making snide quips at Sheldon's expense as Leonard () steps in to smooth things over for his awkward roommate.
The Big Bang Theory airs Thursdays, 8 p.m ET on CBS with Newhart's particular episode airing on May 2nd.