Crossover (Adventure Time)

The episode was written and storyboarded by Sam Alden and Jesse Moynihan, from an outline by showrunner Adam Muto, Jack Pendarvis, and head writer Kent Osborne.

The episode, which debuted on January 28, 2016 on Cartoon Network, guest stars Kumail Nanjiani as Prismo, Lou Ferrigno as Bobby, and James Kyson as Big Destiny.

[6][7] Prismo summons Finn and Jake to his time room and reveals that Farmworld is still in existence; Farmworld-Finn has teamed up with the Jake-Lich, which could lead to destruction of all life in the multiverse.

Prismo is powerless to stop this from occurring, and so he sends Finn and Jake to Farmworld with a device called "The Maid", which will clean up "all class-A inter-dimensional bung-ups."

It is also revealed that the Jake-Lich has been possessing Big Destiny (voiced by James Kyson), gathering up the jewels needed to activate the Farmworld-version of the Enchiridion, so as to open up a portal to the multiverse.

[8] Sam Alden and Jesse Moynihan collaborated on the storyboard, which was submitted for network approval May 18, 2015, and eventually animated by Rough Draft Studios in South Korea.

[10] The episode sees the return of guest stars Ron Perlman, Kumail Nanjiani, and James Kyson; they reprise their characters Jake-Lich, Prismo, and Big Destiny, respectively.

According to Pendarvis, the visual appearance of the Jake-Lich was based on a scene from Invasion of the Body Snatchers (1978), which featured a mutant dog with a man's face.

The sequences that depict the multiverse were designed by Moynihan, and to get the details right, he asked storyboard revisionist Julia Srednicki's father, who was a former quantum physicist, for assistance.

"[15] Sava was complimentary towards Moynihan and Alden's storyboarding sensibilities, specifically highlighting their ability to balance the darker and more humorous aspects of the episode.

Finally, the review also applauded Nanjiani's voice work, as well as the episode's "bold color choices and dramatic compositions that intesify the impact of the story".

"[16] In regards to the latter point, Tran highlighted similarities between the episode, and news stories of the day, writing: It looks as though every wish granted in this way causes an entirely new dimension to be born and exist independently and irrevocably, which is an intriguing idea for the current moment.

Today’s headlines are littered with activists and would-be revisionists attempting to either confront or whitewash this atrocity, or that new perspective, to either insert or obliterate narratives from history books, and effectively from the public consciousness.

The episode was co-storyboarded by Jesse Moynihan .