Escape from the Citadel

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Adventure Time - Season 6 - Episode 2

Adventure Time - Escape from the Citadel

About this Adventure Time episode:
Adventure Time - Escape from the Citadel is the 2nd episode of Adventure Time season 6.
In this Adventure Time episode, Finn and Jake grab hold of the captured Lich as he is transported to the Citadel. Once there, they discover a human figure encased in a crystal-like substance, who they conclude must be Finn's father. Meanwhile, the Lich uses his malevolent magic to begin melting the Citadel and turning its prisoners to his will. Finn's fathe, Martin, is eventually freed by the Lich's actions; he, Finn, and Jake try to escape. One of the Citadel guardians, however, uses its laser and melts away part of Martin's flesh on his leg. Finn retrieves some guardian blood, which repairs and heals Martin. However, Finn starts to realize that his father is not the hero that he thought he would be.
Soon thereafter, Martin leaves Finn and Jake to save himself and the Lich appears, ordering Finn to fall. He delivers a monologue, explaining his desire to extinguish all life in the universe. Finn, overcome by the Lich's power, feebly throws some of the guardian blood on the Lich, which causes him to grotesquely begin growing flesh. With the Lich disposed of, Finn pursues his father, who is hitching a ride with escaping criminals on a loose piece of the Citadel, still held on by a vein. One of the criminals cuts the vein, but Finn holds on, causing his grass sword to envelope his arm and eventually rip away, severing it. Martin escapes, and Finn and Jake share a somber moment. Jake eventually reveals to Finn that the Lich has now been turned into a large humanoid baby; the two leave him on the doorstep of Tree Trunks  and Mr. Pig's house.