
...I would've become a THEORETICAL physicist.
The Big Bang Theory Season 8, Episode 7

So now let's bring out THEORETICAL physicist,
Dr. Sheldon Cooper!
The Big Bang Theory Season 6, Episode 18

No, he's a THEORETICAL physicist
at CalTech.
The Big Bang Theory Season 9, Episode 8

Maybe we can find
another THEORETICAL physicist to help us.
The Big Bang Theory Season 10, Episode 15

as a THEORETICAL
physicist,
The Big Bang Theory Season 7, Episode 20