Maybe we can find
another THEORETICAL physicist to help us.
The Big Bang Theory Season 10, Episode 15
You're summa cum laude in THEORETICAL
physics from Stanford University.
The Big Bang Theory Season 6, Episode 3
What would a THEORETICAL physicist
understand about an experiment anyway?
The Big Bang Theory Season 10, Episode 4
Now to tell you about
the Theoretical Physics Department...
The Big Bang Theory Season 2, Episode 6
Leonard, in the world
of THEORETICAL physics, you never finish.
The Big Bang Theory Season 10, Episode 15