
PRIYA: I can't believe I'm wearing
my brother's Halloween costume.
The Big Bang Theory Season 4, Episode 24

Except the Halloween costume
The Big Bang Theory Season 7, Episode 2

A time machine from a science-fiction show
has nothing to do with Halloween.
The Big Bang Theory Season 6, Episode 5

You know, I used to throw
Halloween parties all the time
The Big Bang Theory Season 12, Episode 6

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