Professor Proton was never late
when he was on TV.
The Big Bang Theory Season 6, Episode 22
...but they made me a junior PROFESSOR
and are requiring me to teach a class.
The Big Bang Theory Season 8, Episode 2
It's time for Professor Proton's
The Big Bang Theory Season 11, Episode 15
{\i1}I'm listening, Professor.{\i0}
Money Heist Season 3, Episode 6
This is us here.
To the south is Professor Loomis
The Big Bang Theory Season 5, Episode 1