
It was Halloween.
The Big Bang Theory Season 12, Episode 6

Halloween.
Oh, yeah.
The Big Bang Theory Season 12, Episode 24

You even went as Avatar
for Halloween.
The Big Bang Theory Season 11, Episode 9

Okay, well, I'd offer
you Halloween candy,
The Big Bang Theory Season 5, Episode 7

Halloween party here.Okay.
The Big Bang Theory Season 12, Episode 6