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Pilot: 2007

Title card Title Airdate "Adventure Time" January 11, 2007 In the pilot cartoon, Pen (who is renamed Finn in the series) and Jake face off against the Ice King to save Princess Bubblegum.

Season 1: 2010

Season 2: 2010-2011

Season two contains 26 half episodes and originally aired from October 2010 to mid-2011. Their titles and production codes were revealed on the Frederator Blog.[4]

Season 3: 2011-2012

Season 3 contains 26 half episodes and originally aired on July 2011 to February 2012. Their titles and production codes were revealed on April 6, 2011 on the Frederator Blog.[26]. Season 3 saw the debut of many recurring characters, such as Fionna and Cake, the Earl of Lemongrab, Flame Princess, Mr. Pig, and Abracadaniel.

Season 4: 2012

Season 4 premiered on April 2, 2012. Episode titles were posted on the Frederator Blog in March 2012.[48]

Writing of the season had started by May 2011.[49] The season saw the premiere of the 100th episode of the series, "The Hard Easy" (previously titled "Prince Huge"). Adam Muto reported that characters not seen since the earlier seasons would return, with The Earl of Lemongrab, Magic Man, the Lich, Hunson Abadeer and Neptr being confirmed to return. Prior to the season's airing, Adam Muto said that Marceline's backstory would be explored further, and Jeremy Shada also mentioned that Marceline and Ice King would sing together,[50], which took place in the episode "I Remember You." The season featured guest voices by Donald Faison, George Takei, Erik Estrada, Andy Milonakis, Emo Phillips, Bobcat Goldthwait and Susie Essman. The season featured one complete two-parter ("Return to the Nightosphere" and "Daddy's Little Monster"), however the season's introductory episode was a continuation of the season 3 finale, and the season 4 finale continued into season 5's two-part opening episode.

Season 5: 2012-2014

In an interview with Charlie Jane Anders, Pendleton Ward revealed that the writers were working on season 5.[67] Season 5 began with the airing of a two-parter on Monday November 12, 7:30 p.m. (ET/PT), 2012, on Cartoon Network titled "Finn the Human"/"Jake the Dog."[68] The episode titles and production codes were revealed by the Frederator blog. It was also revealed that this season was to contain a one-hour special (with the production codes 1014-125, 1014-126, 1014-127, and 1014-128), but it was pushed off for later, and eventually cancelled.[69] As of June 30, 2013, storyboarder Jesse Moynihan revealed that the one-hour "movie" was intended to divide season 5 in half, which has now been extended by another 26 episodes. On November 26, 2013, Jesse Moynihan announced on Twitter that the special had been scrapped. [70] This season consists of twice as many episodes as a normal season, making it the longest season so far. According to iTunes' synopsis, season 5.2 "heats up, cools down, then heats back up again as Flame Princess battles Ice King in a mathematical battle of the elements! And what will Princess Bubblegum discover in the aftermath?! Then P-Bubs joins Marceline on a top-secret mission in search of…wait…that’s top secret! Nice try!! Then take a trip with Finn and Jake to the birthplace of BMO. It will be so cool. But also hot."[71]

Season 6: 2014-2015

On January 28, 2013, it was officially announced that the show had been renewed for a sixth season.[168] On June 30, 2013, storyboarder Jesse Moynihan announced that he would start season six the following week.[169] Season six is not to be confused with the second half of season five; the latter of the two has been referred to as season 5.2 by the writing staff.[170] The sixth season premiered on April 21, 2014, with the airing of the episodes "Wake Up" and "Escape from the Citadel."[171]

Following season 5's cliffhanger finale, the reveal of Finn's dad was prominently teased in the promos leading up to the season premiere. It was also confirmed by the writing staff that a total of eight episodes in season 6 will involve Finn and his dad, featuring some of the show's most cohesive storytelling to date.[172]

Graybles Allsorts: 2015

Main article: Graybles Allsorts

Season 7: 2015-2016

On July 25, 2014, the series was renewed for a seventh season.[230] According to Tom Herpich and Steve Wolfhard, the staff started to pitch story lines in late September of 2014.[231] According to storyboard artist Jesse Moynihan, production for the season began in October of 2014.[232] It was announced to have a stop motion episode in this season;[233] on February 18, 2015, Cartoon Network announced that a special miniseries will be introduced in this season, later known as Stakes,[234][235] after the success short series Over the Garden Wall, created by Patrick McHale, the former creative director of Adventure Time.[236] The miniseries consists of eight episodes, from "Marceline The Vampire Queen" to "The Dark Cloud". Former storyboard artist, Rebecca Sugar, returned to write a new song (Everything Stays) for the miniseries and to voice Marceline's Mom.[238] On October 9, 2015, it was announced for release date from season 7 will be aired on November 2, 2015.[239]

In the DVD release and official websites, Cartoon Network chose to end this season with its 26th episode, "The Thin Yellow Line,"[240] instead of originally planned season finale, "Preboot" and "Reboot".

Season 8: 2016-2017

On July 7, 2015 Adventure Time was renewed for an eighth season according to The Hollywood Reporter.[241] Storyline writing for season eight began on August 10, 2015.[242] On September 8, 2015, storyboarding began according to Sam Alden.[243] During the season, the miniseries Islands aired at the end of January and the beginning of February 2017.[244] It was first hinted before Stakes aired, when head story writer Kent Osborne revealed that the show would likely produce several more miniseries.[245]

After the reshuffling of the previous season,[240] March 26, 2016, when the episode "Broke His Crown" first aired, marks the premiere of season 8.[246] The season ended with the episode "The Light Cloud" as the season finale;[247] which is also the last episode of the miniseries Islands.

Frog Seasons: 2016

Season 9: 2017

Season 9 episodes were originally ordered as part of the series' eighth season, which would make "Three Buckets" envisioned as the eighth-season finale.[262] Under the new order, "Orb" through "Three Buckets" were then considered by Cartoon network to constitute the series' ninth season. [263] The season also features the third and the last miniseries of Adventure Time, Elements, aired on April 24, 2017 as part of the season.[264] It was first announced on March 31, 2017, by Cartoon Network during the unveiling of their 2017–18 program lineup.[264]

Season 10: 2017-2018

Adventure Time was confirmed for another season (known as "Season 9" by the time) by Kent Osborne on July 21, 2016,[294] and it's the final season of the show.[295] 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.[296]

Storyline writing for the season ended in mid-November 2016[297] and the last storyline meeting was held on November 21.[298] Osborne tweeted that the show's final script was pitched to storyboarders on November 28;[299][300] the episode was pitched to the show's producers during the third week of December 2016.[301][302] 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.[303][304][305] Regular production of the series ended on November 16, 2017.[306]

Special

On November 17, 2017, it was announced that a bonus episode entitled "Diamonds and Lemons" would be produced by Microsoft's gaming studio Mojang and air sometime in the summer of 2018. The episode is based on the sandbox video game Minecraft.[29][30] According to Adam Muto, "Diamonds and Lemons" was produced separately from the show's final season.[285]

No. overall No. in season Title card Title Viewers

(in millions) Prod. code Airdate 279 N/A "Diamonds and Lemons" 1.02[332] TBA July 20, 2018[333] Finn and his friends experience setbacks and creative triumphs in a fantastic new vision of Ooo.[334]

DVD short

No. overall No. in season Title card Title Viewers

(in millions) Prod. code Airdate N/A N/A "The Wand" N/A TBA July 10, 2012 Finn and Jake come across a magic wand, but when the wand becomes uncontrollable, they must team up with the Ice King to stop it.

Distant Lands

On October 23, 2019, the Cartoon Network officially announced that Adventure Time would see four new hour-long specials set to air some time in 2020, exclusively on HBO Max. Show-runner Adam Muto is credited for leading production of Adventure Time: Distant Lands with Jack Pendarvis and Kate Tsang announced as members of the writing staff.[335] Multiple storyboard artists have been confirmed to have a part in the upcoming series' development including former storyboard artist Hanna K. Nyström.[336]

No. Title card Title Viewers

(in millions) Prod. code Airdate 1 "BMO" TBA TBA June 25, 2020[337] When there’s a deadly space emergency in the farthest reaches of the galaxy, there’s only one hero to call, and it’s probably not BMO. Except that this time it is![338] 2 "Obsidian" TBA TBA 2020[338] Marceline and Princess Bubblegum journey to the imposing, beautiful Glass Kingdom — and deep into their tumultuous past — to prevent an earthshaking catastrophe.[338] 3 "Wizard City" TBA TBA TBA Peppermint Butler starts over at the beginning, as just another inexperienced Wizard School student. When mysterious events at the campus cast suspicion on Pep, and his checkered past, can he master the mystic arts in time to prove his innocence?[338] 4 "Together Again" TBA TBA TBA Finn and Jake [reunite] to rediscover their brotherly bond and embark on the most important adventure of their lives.[338]

Unproduced episodes

These episodes were planned, and are known from design documents released by Frederator Studios in 2009 during the production of the first season. However, they were not produced for season one, and it is unlikely that they will actually be made into full episodes but it isn't unheard of for an unproduced episode to get produced eventually. Adam Muto has confirmed "Jakesuit" eventually worked its way into "The Silent King,"[citation needed] and it got its own full episode only five seasons later, "Jakesuit" became "Jake Suit."

"Brothers in Insomnia" was originally episode #692-002. However, it was scrapped, and its production number was taken by "Rainy Day Daydream," which was actually one of the last episodes produced for season one.

The Frederator blog also posted notes for an episode that was thought to be titled "You're a Beautiful Dancer."[341] However, Adam Muto later confirmed that "You're a Beautiful Dancer" was just a quote that Finn was saying to Jake and was never meant to be an episode title. He stated that the page in question only contained random story ideas that were never fully developed into episodes.[citation needed]