Professor Proton was never late
when he was on TV.
The Big Bang Theory Season 6, Episode 22
"The Effect of High Energy Muons
on Proton Pion Scattering
The Big Bang Theory Season 12, Episode 9
- How'd you get him to come to your house?
- As Professor Proton always says:
The Big Bang Theory Season 6, Episode 22
- Professor Proton.
- You're kidding.
The Big Bang Theory Season 6, Episode 22