
An actual real SCIENTIST.
The Big Bang Theory Season 1, Episode 4

Yeah, you're a SCIENTIST.
The Big Bang Theory Season 4, Episode 21

for any more SCIENTIST guests,
I hope you'll consider me.
The Big Bang Theory Season 11, Episode 15

...to only cite the lead SCIENTIST.
The Big Bang Theory Season 8, Episode 18

I'm a SCIENTIST.
The Big Bang Theory Season 8, Episode 3