Disquisitiones Arithmeticae

Thanks for the suggestions! I read Wikipedia when I'm bored sometimes, so I know a fair amount about the mythology of the show--the aliens/occult/conspiracy stuff didn't appeal to me all that much. I liked the more funny/character-driven episodes that I saw, though. Arcadia was really fun, and I forget what it's called but I like the one where they get lost in the woods and Scully tries to sing "Jeremiah Was a Bullfrog."