D’oh! The early seasons of “The Simpsons” are a little rough. The animation is a bit shaky and the voices hadn’t fallen into place just yet. But in Season 4 (1992-1993), the animation improved when the series switched to a different studio, a lot of new writers joined the team and Dan Castellaneta found his “inner Homer.” It was like flicking on a switch this season with a goldmine of classic episodes, from “Treehouse of Horror III” with its great “zombie Flanders” gag to “Marge Vs. The Monorail” (written by Conan O’Brien) to “Brother From the Same Planet” (Homer becomes a big brother to Pepsi, I mean Pepe, to get back at Bart) to “Mr. Plow” (Homer’s theme song is pure poetry!) and ending with “Krusty Gets Cancelled.” This is the first of the seasons that begin a long run of great memorable and quotable episodes. Start here and work your way forward.