Adventure Time Season 6 Episode 4 The Tower Episode Title:The Tower.Episode Description:Finn is not happy with his replacement arms made by the princesses, and his emotional anguish manifests itself in the form of a telekinetic arm. With his psychic prosthesis, he decides to build a tower into space in order to find his father, and exact revenge by ripping off his arm. Finn becomes obsessed with building this tower, alarming Princess Bubblegum. After Finn breaches the atmosphere of Earth, he begins to hallucinate, but is rescued at the last minute by a spaceship. On board the spaceship, Finn thinks he see his father and attempts to exact his revenge, only to find himself unable to follow through. Once Finn gives up, Princess Bubblegum reveals that she set up the simulation after rescuing Finn, and that he is not actually on board his father's spacecraft.