Adventure Time was confirmed for another season (known as "Season 9" by the time) by Kent Osborne on July 21, 2016,[1] and it's the final season of the show.[2] According to Adam Muto, the number of episodes ordered by the network as part of the season was substantially lower than it had been, leading the production crew to believe that the series is either ending or going to end soon.[3]

Storyline writing for the season ended in mid-November 2016[4] and the last storyline meeting was held on November 21.[5] Osborne tweeted that the show's final script was pitched to storyboarders on November 28;[6][7] the episode was pitched to the show's producers during the third week of December 2016.[8][9] A number of voice actors, including Maria Bamford and Andy Milonakis, confirmed that voice recording for the season (and series) ended on January 31, 2017.[10][11][12] Regular production of the series ended on November 16, 2017.[13]

No. overall No. in season Title card Title Viewers
(in millions)
Prod. code Airdate
267 1 Titlecard S10E1 thewildhunt "The Wild Hunt" 0.76[14] 1054-275 September 17, 2017[15]
A fierce creature is terrorizing the Candy Kingdom but before Finn can slay the beast, he must first overcome a guilty conscience.[15]
268 2 Titlecard S10E2 alwaysbmoclosing "Always BMO Closing" 0.76[14] 1054-273 September 17, 2017[15]
BMO and Ice King hit the road as door-to-door salesmen and stumble upon an irresistible opportunity.[15]
269 3 Titlecard S10E3 sonofrapbear "Son of Rap Bear" 0.76[14] 1054-276 September 17, 2017[15]
When Flame Princess is coaxed into a high stakes battle against the indomitable Son of Rap Bear, Finn must help her search for a new strategy.[15]
270 4 Titlecard S10E4 bonnibelbubblegum "Bonnibel Bubblegum" 0.76[14] 1054-274 September 17, 2017[15]
A long lost artifact causes Princess Bubblegum to harken back to the creation of the Candy Kingdom.[15]
271 5 Titlecard S10E5 seventeen "Seventeen" 0.76 [16] 1054-281 December 17, 2017[17]
A mysterious knight crashes Finn's birthday bash and presents him with a dangerous gift. [18]
272 6 Titlecard S10E6 ringoffire "Ring of Fire" 0.76 [19] 1054-277 December 17, 2017[20]
When an old flame comes calling on urgent business, Tree Trunks reconsiders both her wild past and her tranquil present.[21]
273 7 Titlecard S10E7 marcy&hunson "Marcy & Hunson" 0.76[22] 1054-278 December 17, 2017[23]
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?[24]
274 8 Titlecard S10E8 thefirstinvestigation "The First Investigation" 0.76 [25] 1054-279 December 17, 2017[26]
Finn and Jake are tasked with investigating reports of a haunting at Joshua and Margaret's old office.[27]
275 9 Titlecard S10E9 blenanas "Blenanas" 0.53[28] 1054-280 March 18, 2018 [29]
Finn's latest literary work is met with only derision so he sets out to prove all the naysayers wrong.[30]
276 10 Titlecard S10E10 jakethestarchild "Jake the Starchild" 0.53[31] 1054-283 March 18, 2018 [32]
In order to fulfill his grand destiny, Jake is spirited away by a strangely familiar shape-shifting alien.[30]
277 11 Titlecard S10E11 templeofmars "Temple of Mars" 0.53[33] 1054-282 March 18, 2018 [34]
Searching for answers on Mars, Finn and Jermaine discover that they must first survive a cunning Martian mental trap.[30]
278 12 Titlecard S10E12 gumbaldia "Gumbaldia" 0.53[35] 1054-284 March 18, 2018 [36]
Finn and Jake, as ambassadors of the Candy Kingdom, travel to a powerful new city-state in a last ditch effort to stave off war.[30]
280 13 Come Along With Me title card "Come Along With Me" 0.92[37] TBA September 3, 2018 [38]
The fate of Ooo is revealed to two adventurers in the distant future; Princess Bubblegum gathers her allies while Finn searches for a way to prevent the coming Great Gum War.[30]

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