
If you could run out and get a PhD,
that might make her like you.
The Big Bang Theory Season 8, Episode 23

A PowerPoint presentation
by Sheldon Cooper, PhD."
The Big Bang Theory Season 3, Episode 15

I must say, Amy, I was very impressed
to see that Bernadette got her PhD.
The Big Bang Theory Season 4, Episode 24

Sorry. I didn't get my PhD
in quitting.
The Big Bang Theory Season 11, Episode 15

I have a PhD from Cornell University.
The Big Bang Theory Season 6, Episode 22