Question: What was the name of an animated American television series which is set in a post-apocalyptic world, with an episode named Reign of Gunters?
Sentence (from "Adventure Time (season 4)"): Finn and Jake live in the post-apocalyptic Land of Ooo, where they interact with the other main characters of the show: Princess Bubblegum, The Ice King, Marceline the Vampire Queen, Lumpy Space Princess, BMO, and Flame Princess.
Relevant evidence: Yes