They cast the new
Professor Proton.
The Big Bang Theory Season 11, Episode 15
No, they're watching
the new Professor Proton.
The Big Bang Theory Season 11, Episode 15
SHELDON:
Nice to meet you, Professor Proton.
The Big Bang Theory Season 6, Episode 22
Hey, Professor Proton.
The Big Bang Theory Season 11, Episode 15
Did you ever watch
Professor Proton
The Big Bang Theory Season 7, Episode 22