
He must be wearing a tinfoil HAT
or something.
The Big Bang Theory Season 6, Episode 6

Indiana Jones was the one
in the HAT with the whip.
The Big Bang Theory Season 7, Episode 4

a Helmet of Confusion spell
on Billy the Kid's cowboy HAT?
The Big Bang Theory Season 5, Episode 10

New HAT?
Breaking Bad Season 2, Episode 1

Hold on to your
conductor's HAT.
The Big Bang Theory Season 7, Episode 15