Yeah, and my eighth favorite
episode of Professor Proton
The Big Bang Theory Season 7, Episode 7
but Professor Proton
came to me in a dream,
The Big Bang Theory Season 9, Episode 11
# Here he comes,
Professor Proton. #
The Big Bang Theory Season 11, Episode 15
Hey, I got an email
from Professor Proton.
The Big Bang Theory Season 7, Episode 7
Nice to meet you, Professor Proton.
The Big Bang Theory Season 6, Episode 22