Premise: "Beyond This Earthly Realm" is the eleventh episode of the fourth season of the American animated television series "Adventure Time". The episode was written and storyboarded by Ako Castuera and Jesse Moynihan, from a story by Patrick McHale, Kent Osborne, and Pendleton Ward. It originally aired on Cartoon Network on June 11, 2012.
Hypothesis: "Beyond This Earthly Realm" was the most popular episode in the fourth season