
What was your first CLUE?
The Big Bang Theory Season 3, Episode 7

- What's that about?
- Not a CLUE.
The Big Bang Theory Season 2, Episode 15

The sole CLUE:
"It's not what it looks like."
The Big Bang Theory Season 5, Episode 1

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

The next CLUE
must be hidden
The Big Bang Theory Season 7, Episode 3