Orb is the first episode of the ninth season of the American animated series Adventure Time. The episode was written and storyboarded and Aleks Sennwald. The episode debuted on April 21, 2017. 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 the episode, Finn, Jake, and BMO are returning to Ooo from Founder's Island when they fall asleep and start dreaming. Their dreams are soon influenced by a mysterious orb.