Bernadette got her DOCTORATE.
The Big Bang Theory Season 10, Episode 11
What's a world-renowned entomologist
with a DOCTORATE...
The Big Bang Theory Season 3, Episode 2
SHELDON: Go ahead.
That's the only DOCTORATE you'll ever get.
The Big Bang Theory Season 6, Episode 9
I have a DOCTORATE in astrophysics
and I'm every bit as awesome
The Big Bang Theory Season 10, Episode 11
get a DOCTORATE.
The Big Bang Theory Season 5, Episode 21