
I have a DOCTORATE
from Indiana University.
The Big Bang Theory Season 12, Episode 5

get a DOCTORATE.
The Big Bang Theory Season 5, Episode 21

What's a world-renowned entomologist
with a DOCTORATE...
The Big Bang Theory Season 3, Episode 2

Bernadette got her DOCTORATE.
The Big Bang Theory Season 10, Episode 11

SHELDON: Go ahead.
That's the only DOCTORATE you'll ever get.
The Big Bang Theory Season 6, Episode 9