Did I tell you about the night my retainer
floated out of my mouth into the airlock?
The Big Bang Theory Season 6, Episode 5
You know what? I DID it. What's 4 bucks?
The Big Bang Theory Season 8, Episode 18
Well, I wasn't sure
how I DID last night,
The Big Bang Theory Season 11, Episode 14
I mean, DID you guys ever
have doubts about each other?
The Big Bang Theory Season 9, Episode 14
All you DID was...
The Big Bang Theory Season 7, Episode 6