TV series example of the word

The Big Bang Theory Season 6, Episode 22
Professor Proton said I should call him Arthur.

The Big Bang Theory Season 11, Episode 15
They cast the new Professor Proton.

The Big Bang Theory Season 11, Episode 15
Hey, Professor Proton.

The Big Bang Theory Season 7, Episode 22
Did you ever watch Professor Proton

The Big Bang Theory Season 12, Episode 16
All right, Professor Proton fans,