Love this exchange in which 99 was visibly pregnant with Max's baby:
Agent 99: Don't you touch me!
Maxwell Smart: What's the matter?
Agent 99: You know perfectly well what's the matter. You don't love me any more because I'm fat and unattractive.
Maxwell Smart: That is ridiculous, 99, just because you're fat and unattractive doesn't mean that I stopped loving you.
Agent 99: Oh, why don't you just come right out and say it, Max?
Maxwell Smart: Huh?
Agent 99: Fat, fat the water rat!
Maxwell Smart: Fat, fat the water rat???
Agent 99: (crying) You take that back!