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

Maybe the spot's
the CLUE.
The Big Bang Theory Season 7, Episode 3

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

There's got to be a CLUE
here somewhere.
The Big Bang Theory Season 12, Episode 2

Is it a CLUE to
a scavenger hunt
The Big Bang Theory Season 12, Episode 2