
Okay, the CLUE
must be in the bag.
The Big Bang Theory Season 7, Episode 3

Yeah, I just thought
you might have a CLUE
where your son is.
Breaking Bad Season 2, Episode 5

- No.
- Not a CLUE.
The Big Bang Theory Season 4, Episode 19

I hope that's a rhetorical question
because I have no CLUE.
The Big Bang Theory Season 6, Episode 1

I'm gonna need
another CLUE.
The Big Bang Theory Season 7, Episode 18