
Classified, Leonard.
The Big Bang Theory Season 2, Episode 22

It's full of CLASSIFIED information
about the Air Force project.
The Big Bang Theory Season 10, Episode 20

Oh, I suppose I could redact
the CLASSIFIED parts.
The Big Bang Theory Season 10, Episode 19

It's CLASSIFIED.
The Big Bang Theory Season 11, Episode 8

I'd have to lose 60 IQ points
to be CLASSIFIED as "smart."
The Big Bang Theory Season 2, Episode 2