I mentioned last year that Alan Moore, creator of the seminal graphic novel The Watchmen, would be appearing in an episode of The Simpsons. Now comes word that the episode, "Husbands and Knives," will air on October 7 and will feature not only Moore, but two other big comic book names: Art Spiegelman (Maus, Maus II, In the Shadow of No Towers) and Daniel Clowes (Eightball, Ghost World, David Boring).