rationalskepticism.org

When I was a child we had a game in English class where the first kid writes a paragraph which is followed by a second kid who adds a paragraph and then folds the first back so the kid writing the third paragraph can't see. And on it goes, each child only privy to the previous paragraph, until a story is formed and the teacher would read it back for lulz

That's how American Horror Story seems to be written replacing paragraphs with episodes.