
Red PROTOCOL, sealing the doors.
I repeat,
Money Heist Season 3, Episode 3

Evacuation PROTOCOL.
Money Heist Season 3, Episode 2

By establishing
a double-blind PROTOCOL
The Big Bang Theory Season 12, Episode 17

We have a PROTOCOL.
Money Heist Season 3, Episode 8

and establishes
a sort of handshake PROTOCOL.
Westworld Season 2, Episode 8