In your opinion when do you think was the last absolute classic? A one where it was brilliant from beginning to end?

In my opinion, its either Behind the Laughter(possibly), The Bart of War or Kill Gil: Volumes 1 & 2 but I think Behind the Laughter episode was likely the most recent classic Simpsons episode whereas Vh1's Behind the Music got parodied in that episode.

For me it was The Book Job