You've heard him tease me
about not having a DOCTORATE.
The Big Bang Theory Season 5, Episode 21
SHELDON: Go ahead.
That's the only DOCTORATE you'll ever get.
The Big Bang Theory Season 6, Episode 9
I have a DOCTORATE
from Indiana University.
The Big Bang Theory Season 12, Episode 5
I have a DOCTORATE in astrophysics
and I'm every bit as awesome
The Big Bang Theory Season 10, Episode 11
Bernadette got her DOCTORATE.
The Big Bang Theory Season 10, Episode 11