get a DOCTORATE.
The Big Bang Theory Season 5, Episode 21
I've been thinking about getting my DOCTORATE,
and he wants to teach. Why not?
The Big Bang Theory Season 8, Episode 2
Bernadette got her DOCTORATE.
The Big Bang Theory Season 10, Episode 11
I have a DOCTORATE in astrophysics
and I'm every bit as awesome
The Big Bang Theory Season 10, Episode 11
I have a DOCTORATE
from Indiana University.
The Big Bang Theory Season 12, Episode 5