We're pretty darned excited for the "The Simpsons" "every episode ever" marathon on FXX, beginning on August 21. That's right, they'll be showing every single episode. That's a dizzying prospect, as is the task of narrowing down 552 episodes (or 228 hours) to only the very best.

In compiling this list, we realized that the fourth season was possibly when the show peaked with some if its greatest eps like "Marge vs. the Monorail," but that doesn't mean that nothing good happened after that.

What's here are some of the most beloved, most quoted eps that you simply have to see. Your list won't look exactly like our list but yours likely has eps that very nearly made the cut here. Just don't look for any "Treehouse of Horrors" segments: They have their very own 'best of' list.