Indeedy. I have a very vague idea for a number four that's like number three, only Mr. Green shot the telegraph girl ("I told you, I'm accident-prone!"), and Communism ISN'T a red herring.

Incidentally, I don't think the third ending is actually canon. I'd swear that the missing guest in the billiard's room scene is Peacock, which makes ending number TWO correct. *shrug* I could be wrong, I only watched it once so far.