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?
Reign of Gunters: "Reign of Gunters" is the twenty-fourth episode of the fourth season of the American animated television series "Adventure Time". 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.
i don't know