Bob Newhart makes his triumphant (and podiactrically supported) return in a new sneak peek released from The Big Bang Theory season 7, episode 7.

A new sneak peek has been released from The Big Bang Theory season 7, episode 7, which will air tomorrow night on CBS. The episode, titled “The Proton Displacement,” will feature the return of television legend Bob Newhart to the geeky comedy in the role of Sheldon’s childhood idol, Professor Proton.

In the clip released from The Big Bang Theory season 7, episode 7, Sheldon, Amy, and Leonard run across the Professor while doing the glamorous work of running errands at the drugstore.

Sheldon is thrilled to see Professor Proton again (and no wonder – in Proton’s first appearance, Sheldon named him his honorary father) and hurries to introduce him to Amy. Amy is star-struck at meeting the very marginally famous Professor, and Proton is flabbergasted that Sheldon actually has a girlfriend. That one mystery is quickly cleared up, however, as Amy’s personality quickly comes to the forefront.

If fans are not sufficiently impressed by the return of Bob Newhart, they can take heart that Professor Proton won’t be the only celebrity appearing in “The Proton Displacement.” Real-life TV scientist Bill Nye (of PBS’s Bill Nye the Science Guy) will also play a role in The Big Bang Theory season 7, episode 7 as a scientific and entertainment rival of Proton’s.

The official summary for The Big Bang Theory season 7, episode 7 also includes a hint at what the rest of the gang will be up to during this exciting 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.”

For a further look at “The Proton Displacement,” check out the stills and promo for tomorrow night’s episode.

The Big Bang Theory season 7, episode 7 will air tomorrow night at 8:00 p.m. on CBS.

What are your hypotheses for ‘The Proton Displacement’?