Except the Halloween costume
The Big Bang Theory Season 7, Episode 2
Halloween.
Oh, yeah.
The Big Bang Theory Season 12, Episode 24
All Hallows' Eve--
thus, Halloween.
The Big Bang Theory Season 12, Episode 6
- I thought you liked Halloween.
- I do...
The Big Bang Theory Season 6, Episode 5
Happy Halloween.
The Big Bang Theory Season 1, Episode 6