as a THEORETICAL
physicist,
The Big Bang Theory Season 7, Episode 20
Senior THEORETICAL particle physicist
at CaITech, focusing on M Theory.
The Big Bang Theory Season 3, Episode 14
Leonard, in the world
of THEORETICAL physics, you never finish.
The Big Bang Theory Season 10, Episode 15
Not just for THEORETICAL physics,
but for astrophysics.
The Big Bang Theory Season 8, Episode 6
Now to tell you about
the Theoretical Physics Department...
The Big Bang Theory Season 2, Episode 6