Season 4, Episode 5, Leela's Homeworld

Bender sets up a successful waste disposal business. But because he dumps everything in the sewers, the Sewer Mutants revolt and sentence Bender, Leela and Fry to be dumped in the Mutagenic Sewage lake. Somehow two robed mutants with an interest in Leela manage to persuade the Supreme Mutant to let them go

Posted in: Season4