She's a neurobiologist, and
I'm a THEORETICAL physicist.
The Big Bang Theory Season 7, Episode 21
She thought if I failed at THEORETICAL physics
that I should have a trade to fall back on.
The Big Bang Theory Season 2, Episode 10
as a THEORETICAL
physicist,
The Big Bang Theory Season 7, Episode 20
- Well, yeah.
- I'm a THEORETICAL physicist.
The Big Bang Theory Season 1, Episode 15
So now let's bring out THEORETICAL physicist,
Dr. Sheldon Cooper!
The Big Bang Theory Season 6, Episode 18