Calvin and Hobbes by Bill Watterson for June 02, 1986
Transcript:
Calvin: Susie, wanna hear a secret? Susie: Sure. Calvin: I think the principal is a space alien spy. He's trying to corrupt our young innocent minds so we'll be unable to resist when his people invade the earth! Calvin: Promise not to tell anyone. Susie: Don't worry.
I think that is true of every principal I ever had. All of them were friends – in my small town. .Knew the superintendent, too, but he never really interacted with the students, so I don’t know if he was part of the invading party. ;)