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Adventure Time Season 9

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Here's where to watch every episode of Adventure Time season 9. Mouseover or tap an episode to see where to stream it. Click or tap the play icon to stream it on the best available service.
Season 09, Episode 01 Orb

S09 E01

Apr 21, 2017
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Orb Apr 21, 2017 During the journey home from their sea-faring adventure; Finn, Jake, and BMO encounter a mysterious force that enters their dreams.

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Season 09, Episode 02 Elements Part 1: Skyhooks

S09 E02

Apr 24, 2017
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Elements Part 1: Skyhooks Apr 24, 2017 Finn, Jake and BMO arrive back in Ooo and discover that their home and the areas surrounding it have been entirely converted into candy. They also encounter Fern, N.E.P.T.R., Shelby, Lemongrab, Tree Trunks, Mr. Pig and Marceline who have been converted into happily brainwashed candy people. A frightened Sweet P is the only person who is still normal and directs the gang to a mysterious candy tower. The tower turns out to be Princess Bubblegum who has become a large candy being and attempts to convert the gang into candy people as well. While BMO is completely transformed, Finn and Jake are rescued by Ice King who takes them to the Sky Kingdom. As Finn and Jake look down, they discover that Ooo has been divided into four completely corrupted sections.

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Season 09, Episode 03 Elements Part 2: Bespoken For

S09 E03

Apr 24, 2017
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Elements Part 2: Bespoken For Apr 24, 2017 The friends learn the story of what happened to Ooo, while Betty continues her attempt to reach Simon, but she's interrupted by someone out to steal her magic.

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Season 09, Episode 04 Elements Part 3: Winter Light

S09 E04

Apr 25, 2017
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Elements Part 3: Winter Light Apr 25, 2017 Finn, Jake and Ice King travel to the Ice World and break through the large ice dome covering the center of the land. They encounter Carroll (voiced by Cameron Esposito), from "The Tower", who was converted to Ice and is genuinely pleased with her new appearance. The gang eventually encounter a powered up, and rather withheld, Patience who seems disappointed with the outcome of the new Ooo. While she succeeded in empowering the other elementals they have relegated themseleves to their sections of Ooo as Patience had forced them to power up rather than allow them to do so themseleves. The gang rescue Betty and leave while Patience bemoans the new world to an iced Choose Goose. Betty reveals that she can help them with the power of the Enchiridion which Finn has, causing Betty to ominously laugh.

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Season 09, Episode 05 Elements Part 4: Cloudy

S09 E05

Apr 25, 2017
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Elements Part 4: Cloudy Apr 25, 2017 After taking a nap, Finn and Jake get separated from Betty and the Ice King. They need to get back and Jake needs to go pee.

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Season 09, Episode 06 Elements Part 5: Slime Central

S09 E06

Apr 26, 2017
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Elements Part 5: Slime Central Apr 26, 2017 Finn and Jake arrive in the transformed Slime Kingdom to retrieve Slime Princess' crown for her jewel. They run into Lumpy Space Princess who is attending Slime Princess's roller skating party. The winners of the skating competition get absorbed into Slime Princess's whole being while the losers are caged up. Finn, Jake and Lumpy Space Princess enter, but lose, only to learn that by losing they still get absorbed. While Finn manages to grab the crown, Jake gets fully absorbed into Slime Princess forcing Lumpy Space Princess to save Finn, revealing in the process that 'her lumps' protect her from corruption. They are ejected from Slime Princess and forced to leave. Finn is saddened at the loss of Jake, but Lumpy Space Princess explains that Finn and Jake always win which inspires Finn to continue his mission.

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Season 09, Episode 07 Elements Part 6: Happy Warrior

S09 E07

Apr 26, 2017
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Elements Part 6: Happy Warrior Apr 26, 2017 After gathering the Slime jewel, Finn and LSP go to the Fire Kingdom, to gather the Flame Jewel. Everything has turned even hotter than before.

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Season 09, Episode 08 Elements Part 7: Hero Heart

S09 E08

Apr 27, 2017
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Elements Part 7: Hero Heart Apr 27, 2017 Lumpy Space Princess chases Finn and attempts to turn him back to normal, but to no avail. Ice King and Betty try to intervene, but are swatted away by Flame Princess. The Fire Kingdom inhabitants 'fight' the Candy Kingdom inhabitants making Lumpy Space Princess upset. After eating some of Marceline, who is made of marshmallows, Lumpy Space Princess reaches out to Finn's hero heart by placing some of Princess Bubblegum onto him. Recalling happier times with PB, Finn returns to normal. PB then fires her candy powers into the air and converts everyone into obedient candy people, except for Finn who was protected by Lumpy Space Princess. Finn nabs the three jewels and gives them to Betty, but she leaves him behind. Finn finds himself surrounded by the Candy Kingdom.

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Season 09, Episode 09 Elements Part 8: Skyhooks II

S09 E09

Apr 27, 2017
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Elements Part 8: Skyhooks II Apr 27, 2017 After saving Finn the human during a battle between the candy kingdom and the fire kingdom it is discovered that LSP is made of anti-elemental magic and restores Ooo to it's former state.

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Season 09, Episode 10 Abstract

S09 E10

Jul 17, 2017
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Abstract Jul 17, 2017 Jake struggles through the personal changes happening to him as a mysterious encounter in a dream with his brother Jermaine begins to haunt him.

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Season 09, Episode 11 Ketchup

S09 E11

Jul 18, 2017
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Ketchup Jul 18, 2017 BMO and Marceline play catch up on recent events.

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Season 09, Episode 12 Fionna and Cake and Fionna

S09 E12

Jul 19, 2017
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Fionna and Cake and Fionna Jul 19, 2017 While performing a reading of 'Fiona and Cake', Ice King is confronted by a familiar figure.

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Season 09, Episode 13 Whispers

S09 E13

Jul 20, 2017
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Whispers Jul 20, 2017 While safeguarding a frightened Sweet P, Finn is led into a confrontation with an old foe.

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Season 09, Episode 14 Three Buckets

S09 E14

Jul 21, 2017
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Three Buckets Jul 21, 2017 Finn and Fern's carefree visit to some old ruins turns disastrous.

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Season 09, Episode 15 The Wild Hunt

S09 E15

Sep 17, 2017
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The Wild Hunt Sep 17, 2017 A fierce creature is terrorizing the Candy Kingdom but before Finn can slay the beast, he must first overcome a guilty conscience.

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Season 09, Episode 16 Always BMO Closing

S09 E16

Sep 17, 2017
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Always BMO Closing Sep 17, 2017 While safeguarding a frightened Sweet P, Finn is led into a confrontation with an old foe.

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Season 09, Episode 17 Son of Rap Bear

S09 E17

Sep 17, 2017
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Son of Rap Bear Sep 17, 2017 An unexpected critic shows up at Ice King’s latest Fionna and Cake book reading.

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Season 09, Episode 18 Bonnibel Bubblegum

S09 E18

Sep 17, 2017
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Bonnibel Bubblegum Sep 17, 2017 BMO and Marceline swap stories about their recent adventures.

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Season 09, Episode 19 Seventeen

S09 E19

Dec 18, 2017
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Seventeen Dec 18, 2017 A mysterious knight crashes Finn's birthday bash and presents him with a dangerous gift.

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Season 09, Episode 20 Ring of Fire

S09 E20

Dec 18, 2017
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Ring of Fire Dec 18, 2017 When an old flame comes calling on urgent business, Tree Trunks reconsiders both her wild past and her tranquil present.

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Season 09, Episode 21 Marcy & Hunson

S09 E21

Dec 18, 2017
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Marcy & Hunson Dec 18, 2017 Hunson Abadeer returns to Ooo to bond with his daughter Marceline, but will he be able to prove he's changed his soul-sucking ways?

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Season 09, Episode 22 The First Investigation

S09 E22

Dec 18, 2017
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The First Investigation Dec 18, 2017 Finn and Jake are tasked with investigating reports of a haunting at Joshua and Margaret's old office.

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Season 09, Episode 36
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Season 09, Episode 37 Diamonds and Lemons
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Diamonds and Lemons Finn and his friends experience setbacks and creative triumphs in a fantastic new vision of Ooo.TBA 2018

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