...because he said
it was a THEORETICAL nut conflict.
The Big Bang Theory Season 8, Episode 21
Maybe we can find
another THEORETICAL physicist to help us.
The Big Bang Theory Season 10, Episode 15
It's very impressive.
For THEORETICAL work.
The Big Bang Theory Season 4, Episode 3
...THEORETICAL physics is... What's the word
I'm looking for? Hmm, cute.
The Big Bang Theory Season 4, Episode 3
So now let's bring out THEORETICAL physicist,
Dr. Sheldon Cooper!
The Big Bang Theory Season 6, Episode 18