Cheers, Season 4

[The gang discusses the stranger in the bar]]

Sam:
Aw, come on, man. Just 'cause he looks like a spy and acts like a spy doesn't mean he is a spy, does it?

Norm:
I think it pretty much does, Sam. You don't suppose this guy is with, like, the CIA or FBI or anything, do you?

Cliff:
Ah, could be.

Sam:
Alright, let's go over the four things we know about him: He's been here since we opened, he's not drinking, he's not waiting for a table upstairs... Actually, that's only three. Anybody else know anything?

Diane:
You're an idiot!

Sam:
That would be four, then.