Finn and Jake run into the Never-Ending Pie-Throwing Robot (Neptr), who helps them on their mission, which is to work on a song or a rap to help Henry Alexander win his love back, and that, of ...

Some very fun Jake transformations in this episode: He slithers across the ground with Finn inside him, then shapeshifts into a flight of stairs for Finn to use to get up to the Enchiridion.