Ask any fan of the 'The Simpsons' for their all-time favorite episodes and chances are, most of those will be from their annual Halloween episode, 'Treehouse of Horror.'

So how to narrow down 21 years and 60 segments to a mere 10? Just contemplating it can drive you mad!

This year's episode airs Sun., Nov. 7, (that's right after Halloween), but we couldn't wait to revisit the 'Simpsons' best horror send-ups. We've got vampires, zombies, killer clowns. But hey, note to Matt Groening: Where are the mummies?

Here's out list. We regrettably had to leave off several fantastic segments like 'King Homer,' 'Attack of the 50 Foot Eyesores' and 'Starship Poopers.' In fact, we didn't even have room for Treehouse regulars Kang and Kodos! (We'll send them a muffin basket.)