
This is my door.
Please close it behind you, GOODBYE.
The Big Bang Theory Season 1, Episode 12

- Goodbye, Leonard.
- Yeah, no, bye, Penny.
The Big Bang Theory Season 1, Episode 15

Maybe I could do one more scary thing
before I go and give you a kiss GOODBYE?
The Big Bang Theory Season 6, Episode 18

- All right. Goodbye.
- No, wait.
The Big Bang Theory Season 2, Episode 8

I've already had to say good-bye
to 11 Dr. Whos.
The Big Bang Theory Season 7, Episode 22