Finn the Human

Finn the Human is a seen chained up in Mom's castle with his  Jake.

Production
Finn is a main character on the Cartoon Network series . His cameo on Futurama was announced on the day before 7ACV22 aired.

Trivia

 * His cameo in Futurama came less than a month after the announcement of the Simpsons/Futurama crossover episode.