- How'd you get him to come to your house?
- As Professor Proton always says:
The Big Bang Theory Season 6, Episode 22
that people would still
call me Professor Proton
The Big Bang Theory Season 7, Episode 7
All right,
Professor Proton fans,
The Big Bang Theory Season 12, Episode 16
Professor Proton,
it's an honor to meet you.
The Big Bang Theory Season 6, Episode 22
Professor Proton said
I should call him Arthur.
The Big Bang Theory Season 6, Episode 22