
Theoretical physicists do not get canned.
The Big Bang Theory Season 1, Episode 4

Senior THEORETICAL particle physicist
at CaITech, focusing on M Theory.
The Big Bang Theory Season 3, Episode 14

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

Is it maybe because, like Sheldon's work,
your sex life is also THEORETICAL?
The Big Bang Theory Season 6, Episode 9

- Well, yeah.
- I'm a THEORETICAL physicist.
The Big Bang Theory Season 1, Episode 15