SHELDON: Go ahead.
That's the only DOCTORATE you'll ever get.
The Big Bang Theory Season 6, Episode 9
I've been thinking about getting my DOCTORATE,
and he wants to teach. Why not?
The Big Bang Theory Season 8, Episode 2
You've heard him tease me
about not having a DOCTORATE.
The Big Bang Theory Season 5, Episode 21
get a DOCTORATE.
The Big Bang Theory Season 5, Episode 21
Is it any wonder
he doesn't have a DOCTORATE?
The Big Bang Theory Season 4, Episode 18