Ay Caramaba!

This fall, Kelsey Grammer returns to voice Sideshow Bob as the maniac sidekick gets his wish after a quarter century - Bob will kill Bart Simpson in the Halloween episode.

During the ATX Festival panel in Austin, Texas, on Saturday, "The Simpsons" producers announced their daring plot. Executive producer Al Jean said the Coyote never got the Road Runner in the Looney Tunes cartoon, and that always irked him. "I hated frustration comedy so we'll scratch that itch," Jean told Entertainment Weekly.

This doesn't mean the end of Bart. He'll be back and you'll be eating his shorts, man, after the format-shattering Halloween stunt.

The producers also announced that a fan favorite from "The Simpsons Movie" will be back in the 27th season: Spider-Pig!

Obviously, Spider-Pig does what a Spider-Pig does, but unless a Spider-Pig is an extremely diverse voice actor, we can be sure that Spider-Pig won't be filling in for Harry Shearer, who recently announced his departure from the show.

The producers said they are still hoping to reach a new deal with Shearer.