Neilson: Mr. Archer, at the count of three, shoot Doctor Watson.
John: What?!
Sherlock: I don’t have the code.
Neilson: One.
Sherlock: I don’t know the code.
Neilson: Two.
Sherlock: She didn’t tell me. I don’t know it!
Neilson: I’m prepared to believe you any second now. Three.
Sherlock: No, stop!