Professor Proton was never late
when he was on TV.
The Big Bang Theory Season 6, Episode 22
this Professor Proton thing
pretty hard.
The Big Bang Theory Season 7, Episode 22
Professor Proton is dead?
The Big Bang Theory Season 7, Episode 22
Did you ever watch
Professor Proton
The Big Bang Theory Season 7, Episode 22
- How'd you get him to come to your house?
- As Professor Proton always says:
The Big Bang Theory Season 6, Episode 22