I went to school for half my life.
I have a DOCTORATE.
The Big Bang Theory Season 8, Episode 20
Your DOCTORATE is in neurobiology.
I fail to see the distinction.
The Big Bang Theory Season 4, Episode 24
I have a DOCTORATE in astrophysics
and I'm every bit as awesome
The Big Bang Theory Season 10, Episode 11
I've been thinking about getting my DOCTORATE,
and he wants to teach. Why not?
The Big Bang Theory Season 8, Episode 2
SHELDON: Go ahead.
That's the only DOCTORATE you'll ever get.
The Big Bang Theory Season 6, Episode 9