Frost & Fire (Adventure Time)

"Frost & Fire" is the thirtieth episode of the fifth season of the American animated television series Adventure Time. It was written and storyboarded by Luke Pearson and Somvilay Xayaphone, from a story by Kent Osborne, series creator Pendleton Ward, Jack Pendarvis, and showrunner Adam Muto. It originally aired on Cartoon Network on August 5, 2013. The episode guest stars M. Emmet Walsh as the Cosmic Owl.

The series follows the adventures of Finn (voiced by Jeremy Shada), a human boy, and his best friend and adoptive brother Jake (voiced by John DiMaggio), a dog with magical powers to change shape and grow and shrink at will. In this episode, Finn has pleasurable dream which involves Flame Princess (voiced by Jessica DiCicco) and Ice King (voiced by Tom Kenny) fighting each other, but he wakes up before he can finish it. He then decides to stage a fight between the two in real life to see if he can finish the dream. However, during the fight, Flame Princess destroys the Ice Kingdom and discovers that Finn set up the fight. Feeling betrayed, she breaks up with him.

"Frost & Fire" was the last episode of the fifth season to have been storyboarded by Pearson, although he later returned to revise the storyboards for "Earth & Water". "Frost & Fire" was seen by 3.009 million people, making it one of only four season five episodes to be watched by over 3 million viewers. The episode received largely positive critical reception, with Oliver Sava of The A.V. Club applauding its subtle exploration of puberty and sexuality.