<Tr> <Td_colspan="8"> 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 . </Td> </Tr> <Tr> <Th> 267 </Th> <Td> 15 </Td> <Td> "The Wild Hunt" </Td> <Td> Cole Sanchez </Td> <Td> Sam Alden, Erik Fountain & Polly Guo </Td> <Td> September 17, 2017 (2017 - 09 - 17) </Td> <Td> TBA </Td> <Td> TBD </Td> </Tr> <Tr> <Td_colspan="8"> Still feeling guilty over Fern's death, Princess Bubblegum tasks Finn to protect the banana guard from a monster later dubbed the Grumbo . Finn can't bring himself to slay the monster as he keeps seeing Fern's face materialize when he's close to defeating it . Later, Finn meets up with Huntress Wizard who is also trying to slay the Grumbo and she tries to give encouraging words to Finn . They find the Grumbo's cave and Finn once again stalls . Huntress Wizard puts herself in harm's way and Finn imagines Fern in her place and finally slays the Grumbo . They realize that the Grumbo was artificially created and the mysterious man, revealed to be Uncle Gumbald, plots to create another monster . </Td> </Tr> <Tr> <Th> 268 </Th> <Td> 16 </Td> <Td> "Always BMO Closing" </Td> <Td> Diana Lafyatis </Td> <Td> Graham Falk & Kent Osborne </Td> <Td> September 17, 2017 (2017 - 09 - 17) </Td> <Td> TBA </Td> <Td> TBD </Td> </Tr>

Who was the guy at the end of three buckets