
...and probably cost Howard
his security CLEARANCE.
The Big Bang Theory Season 4, Episode 7

She doesn't exactly have CLEARANCE.
The Big Bang Theory Season 2, Episode 8

Listen,
I have to get a security CLEARANCE...
The Big Bang Theory Season 4, Episode 7

That's why I was refused CLEARANCE
for a government research fellowship...
The Big Bang Theory Season 2, Episode 1

Guess who didn't get security CLEARANCE
to work on the giant space laser?
The Big Bang Theory Season 4, Episode 7