Oh, the project is CLASSIFIED,
I can't tell you.
The Big Bang Theory Season 10, Episode 19
Classified, Leonard.
The Big Bang Theory Season 2, Episode 22
It's CLASSIFIED.
The Big Bang Theory Season 11, Episode 8
You've been CLASSIFIED as terrorists,
so I got the CIA, Interpol,
Money Heist Season 3, Episode 5
It's a secure lab
in a CLASSIFIED facility,
The Big Bang Theory Season 10, Episode 23