When Lisa starts wearing Marge's "vintage" clothes from the 90's, she's welcomed into the school's super-elite fashion club. But as they run out of retro looks, the funky fashionistas become obsessed with getting more... by hook or by crook.

Homer gets Superintendent Chalmers a job at the power plant. There, Chalmers discovers huge mutated snails that produce valuable slime launching his new career as a man-o-sphere guru.

Springfield is threatened by a mysterious killer monster emerging from the sewers, Krusty welcomes a demonic guest to his Halloween special, and the action moves a thousand years into the future in a post-apocalyptic, plastic version of the city.