The Simpsons"The Simpsons" couch gag has become a pop culture icon of its own, and when the animated comedy returns for its 28th season Sunday (yeah, twenty eighth), the gag gets a little adventurous.

The opening is an homage to "Adventure Time," the Cartoon Network series about a dog named Jake and his human friend, Finn, in the magical land of Ooo. As executive producer Al Jean told TVLine, "That was the brain child of Mike Anderson, our supervising director. It's a really beautiful, elaborate crossover."

In the "Simpsons" gag, Bart is Finn, with Homer as Jake the dog and Mr. Burns is the Ice King. Speaking of Mr. Burns, the filthy rich businessman is forced to put on a variety show. Amy Schumer guest stars as Burns' mother.

"We learn something that might have made him the man he is," Jean told Entertainment Weekly. "We discover he was the equivalent of an Internet fail sensation in, like, 1917."

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