Maybe we can find
another THEORETICAL physicist to help us.
The Big Bang Theory Season 10, Episode 15
...because he said
it was a THEORETICAL nut conflict.
The Big Bang Theory Season 8, Episode 21
Not just for THEORETICAL physics,
but for astrophysics.
The Big Bang Theory Season 8, Episode 6
...to succeed in THEORETICAL physics.
The Big Bang Theory Season 2, Episode 6
She's a neurobiologist, and
I'm a THEORETICAL physicist.
The Big Bang Theory Season 7, Episode 21