
...I thought it might be fun for us
to go in a couples' COSTUME.
The Big Bang Theory Season 6, Episode 5

Okay? Any COSTUME you want.
The Big Bang Theory Season 1, Episode 6

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

Yeah, now about those.
They came from a COSTUME shop...
The Big Bang Theory Season 8, Episode 22

See, this is why I wanted
to have a COSTUME meeting.
The Big Bang Theory Season 1, Episode 6