The Sewer is the home to many of New New York's mutants. It is a damp, dark place like one would expect. There are several small towns and a giant toilet that leads to the Sub-sewers. The Planet Express crew has visited on numerous occasions.
- "I Second that Emotion"
- "The Luck of the Fryrish"
- "Leela's Homeworld"
- "Less Than Hero"
- "Teenage Mutant Leela's Hurdles"
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