May I tell you a SECRET?
Game of Thrones Season 4, Episode 1
This is the SECRET knock:
The Big Bang Theory Season 1, Episode 16
...at a SECRET military supercollider
beneath a fake agricultural station...
The Big Bang Theory Season 2, Episode 1
Hi. Okay, can you guys
keep a SECRET?
The Big Bang Theory Season 12, Episode 16
because it's classified
and top SECRET.
The Big Bang Theory Season 11, Episode 8