Fern reveals his ability to change his appearance to look just like Finn. Impressed, Finn joins Fern to a dungeon hidden away in a mountain. While there, Fern traps Finn in one of the rooms and reveals his plan to replace him. Finn finds out that his robotic arm can do a variety of things and drills his way out of the dungeon. Finn and Fern fight out in the field where Finn attempts to reason with Fern, however his robot arm misinterprets the word "finality" with "fatality" and he ends up destroying Fern. Finn returns home traumatized with Jake and BMO comforting him. Meanwhile, a mysterious man (voiced by Fred Melamed) scoops up Fern's still living remains in a bucket.

Adventure Time Season 9 Episodes...

• s09e01 - Orb
• s09e02 - Elements, Part 1: Skyhooks
• s09e03 - Elements, Part 2: Bespoken For
• s09e04 - Elements, Part 3: Winter Light
• s09e05 - Elements, Part 4: Cloudy
• s09e06 - Elements, Part 5: Slime Central
• s09e07 - Elements, Part 6: Happy Warrior
• s09e08 - Elements, Part 7: Hero Heart
• s09e09 - Elements, Part 8: Skyhooks II
• s09e10 - Abstract
• s09e11 - Ketchup
• s09e12 - Fionna and Cake and Fionna
• s09e13 - Whispers
• s09e14 - Three Buckets

Adventure Time Show Summary

Adventure Time, originally titled Adventure Time with Finn and Jake, follows two best friends: Finn (a 12-year old boy) and Jake (a wise 28-year-old dog with magical powers), and the surreal adventures undertaken by the duo as they traverse the mystical Land of Ooo. A world built for adventure, Ooo is filled to the brim with various landscapes for the two buddies to explore and bizarre characters to assist.