
It looks like an immensely
complex encryption KEY.
Westworld Season 2, Episode 5

So, the KEY is
The Big Bang Theory Season 10, Episode 22

Hang on, I think the emergency KEY
is around here somewhere.
The Big Bang Theory Season 2, Episode 21

But returning to your KEY conundrum,
you should call a locksmith.
The Big Bang Theory Season 2, Episode 3

You don't have the KEY, do you?
Westworld Season 3, Episode 8