List of Adventure Time episodes

Adventure Time is an American animated television series created by Pendleton Ward for Cartoon Network. The show originally began in 2008 with a pilot for Random! Cartoons on Nickelodeon, and launched as its own series on April 5, 2010. Its third season ended on February 13, 2012, its fourth began on April 2, 2012, and the show's writers have begun work on the fifth.

Series overview

Season		Episodes	Season premiere	Season finale	DVD release date
	Pilot	1	December 7, 2008		N/A
	1	26	April 5, 2010	September 27, 2010	July 10, 2012
	2	26	October 11, 2010	May 9, 2011	TBA
	3	26	July 11, 2011	February 13, 2012	TBA
	4	26	April 2, 2012	October 8, 2012	TBA
	5	26	TBA	TBA	TBA
	6	26	TBA	TBA	TBA

Episodes

Pilot: 2008

#	Title	Directed by	Written by	Original U.S. airdate
0	"Adventure Time"	Larry Leichliter Hugo Morales Pendleton Ward	Pendleton Ward	December 7, 2008 (2008-12-07)
Pen (who is renamed Finn in the series) and Jake have to rescue Princess Bubblegum from the Ice King.

Season 1: 2010

#	#	Title	Directed by	Written and storyboarded by	Original U.S. airdate	Production code	No. of U.S. viewers (in millions)
1a	1a	"Slumber Party Panic"	Larry Leichliter	Adam Muto Elizabeth Ito	April 5, 2010 (2010-04-05)	692-009	2.50
Finn and Princess Bubblegum must protect the Candy Kingdom from a horde of candy zombies they accidentally created and deal with the consequences of breaking a "royal promise."
1b	1b	"Trouble in Lumpy Space"	Larry Leichliter	Adam Muto Elizabeth Ito	April 5, 2010 (2010-04-05)	692-015	—
Finn must travel to Lumpy Space to find a cure that will save Jake, who was accidentally bitten by Lumpy Space Princess at Princess Bubblegum's marshmallow tea party.
2a	2a	"Prisoners of Love"	Larry Leichliter	Pendleton Ward Adam Muto	April 12, 2010 (2010-04-12)	692-005	1.85
Finn and Jake attempt to rescue a series of princesses who were kidnapped by Ice King in his attempt to marry one.
2b	2b	"Tree Trunks"	Larry Leichliter	Bert Youn Sean Jimenez	April 12, 2010 (2010-04-12)	692-016	—
Tree Trunks joins Finn and Jake who go on a quest to fulfill her desire of picking a proposed legendary apple in an evil forest.
3a	3a	"The Enchiridion!"	Larry Leichliter	Pendleton Ward Adam Muto Patrick McHale	April 19, 2010 (2010-04-19)	692-001	2.10
Finn and Jake go on a quest for a magical book that would prove them worthy of being righteous heroes. Guest voices: John Moschitta, Jr. as The Keyper, Mark Hamill as The Dark Wizard, and Fred Tatasciore as Mannish the Manly Minotaur. Note: This is the first episode of the series to be produced followed by "Rainy Day Daydream" which aired on September 6, 2010.
3b	3b	"The Jiggler"	Larry Leichliter	Luther McLaurin Armen Mirzaian	April 19, 2010 (2010-04-19)	692-011	—
A strange creature attracted by Finn's auto-tuned singing voice follows the duo to their home and they keep him as a pet, but soon struggles to keep him after several strange occurrences.
4a	4a	"Ricardio the Heart Guy"	Larry Leichliter	Bert Youn Sean Jimenez	April 26, 2010 (2010-04-26)	692-007	1.91
Finn believes that Princess Bubblegum's new friend, a literal heart named "Ricardio", is evil, and is proven right after learning that Ricardio is the heart of the Ice King. Guest voice: George Takei as Ricardio.
4b	4b	"Business Time"	Larry Leichliter	Luther McLaurin Armen Mirzaian	April 26, 2010 (2010-04-26)	692-014	—
Finn and Jake fall victim to their own laziness when they delegate their adventuring responsibilities to a group of businessmen thawed from an iceberg. Guest voice: Brian Posehn as Business Man #1
5a	5a	"My Two Favorite People"	Larry Leichliter	Pendleton Ward Kent Osborne	May 3, 2010 (2010-05-03)	692-004	1.65
Jake feels overwhelmed at not having enough time for Finn and his girlfriend, Lady Rainicorn, so he tries to get them to hang out more, leading to disaster between the two friends. Note: This episode was nominated for an Emmy.
5b	5b	"Memories of Boom Boom Mountain"	Larry Leichliter	Bert Youn Sean Jimenez	May 3, 2010 (2010-05-03)	692-010	—
Finn reflects on an upsetting experience when he was a baby and pledges to help everyone in need, but this proves more difficult than imagined. Note: This episode reveals that Boom Boom Mountain is where Finn was found and adopted by Jake's parents.
6a	6a	"Wizard"	Larry Leichliter	Bert Youn Pete Browngardt Adam Muto	May 10, 2010 (2010-05-10)	692-020	1.82
Finn and Jake are coaxed by a skeleton man to enroll in a course for free magic powers, but are ultimately tricked into helping stop an asteroid.
6b	6b	"Evicted!"	Larry Leichliter	Bert Youn Sean Jimenez	May 17, 2010 (2010-05-17)	692-003	1.88
Finn and Jake search the land of Ooo for a new home after a vampire girl named Marceline claims the duo's treehouse as her own. Note: Olivia Olson joins the recurring cast as Marceline.
7a	7a	"City of Thieves"	Larry Leichliter	Bert Youn Sean Jimenez	May 24, 2010 (2010-05-24)	692-012	1.83
When confronted by a Tree Witch over how uncorruptible he is, Finn enters the City of Thieves with Jake to confront a thief who is believed to have stolen a flower basket from a little girl named "Penny". However, staying pure of heart within the city proves to be easier said than done, as Finn learns another side to his new friend.
7b	7b	"The Witch's Garden"	Larry Leichliter	Kent Osbourne Niki Yang Adam Muto	June 7, 2010 (2010-06-07)	692-022	1.81
Jake loses his enthusiasm for adventure when a witch strips him of his powers as a penalty for eating a doughnut that was grown in her garden.
8a	8a	"What Is Life?"	Larry Leichliter	Luther McLaurin Armen Mirzaian	June 14, 2010 (2010-06-14)	692-017	1.64
Finn builds N.E.P.T.R., a Never-Ending Pie-Throwing Robot, to pull a prank on Jake, but the machine's conscience is conflicted by the will of the Ice King when he is attacked by his private particles. Guest voice: Andy Milonakis as N.E.P.T.R.
8b	8b	"Ocean of Fear"	Larry Leichliter	JG Quintel Cole Sanchez	June 21, 2010 (2010-06-21)	692-025	2.00
Jake tries to help Finn overcome his sudden fear of the ocean. Guest voices: Mark Hamill as the Fear-Feaster and Clancy Brown as the opening and closing narrator.
9a	9a	"When Wedding Bells Thaw"	Larry Leichliter	Kent Osbourne Niki Yang	June 28, 2010 (2010-06-28)	692-013	1.92
The Ice King suppresses his kidnapping urges to wed a suspicious bride and convinces Finn and Jake to throw him a "manlorette party", but soon realizes he'll have to give up his constant hobby.
9b	9b	"Freak City"	Larry Leichliter	Pendleton Ward Tom Herpich	July 26, 2010 (2010-07-26)	692-008	2.03
After being transformed into a foot by a magic man, Finn joins forces with a band of misfits to turn back to normal. Guest voice: Michael Dorn as Gork.
10a	10a	"Henchman"	Larry Leichliter	Luther McLaurin Cole Sanchez	August 23, 2010 (2010-08-23)	692-021	2.17
Finn takes the place as Marceline's new henchman, believing he'll find it hard to obey her evil ways, and discovers a new side to this character.
10b	10b	"Dungeon"	Larry Leichliter	Elizabeth Ito Adam Muto	July 12, 2010 (2010-07-12)	692-023	2.48
Finn's headstrong decision to explore a dungeon in defiance of Jake and Princess Bubblegum's warnings puts him in great danger. Guest voice: Clancy Brown as the Demon Cat.
11a	11a	"The Duke"	Larry Leichliter	Elizabeth Ito Adam Muto	July 19, 2010 (2010-07-19)	692-019	1.84
Finn turns Princess Bubblegum green and bald, and faces a moral quandary—whether to confess his mistake and be hated by his friend forever, or let Princess Bubblegum wrongly accuse the Duke of Nuts instead.
11b	11b	"Donny"	Larry Leichliter	Kent Osbourne Niki Yang Adam Muto	August 9, 2010 (2010-08-09)	692-018	—
Finn and Jake help a bullying grass ogre named Donny turn his life around, without realizing the ecological damage they may be causing in the process. Guest voices: Kevin Michael Richardson as Donny
12a	12a	"Rainy Day Daydream"	Larry Leichliter	Pendleton Ward	September 6, 2010 (2010-09-06)	692-002	2.17
Stuck indoors due to a raining knife storm, Finn discovers that Jake can make his imagination come to life, causing chaos in the treehouse.
12b	12b	"What Have You Done?"	Larry Leichliter	Elizabeth Ito Adam Muto	September 13, 2010 (2010-09-13)	692-006	1.54
Without giving good details Princess Bubblegum tells Finn and Jake to capture the Ice King as their prisoner, but when they interrogate him they think that he's innocent.
13a	13a	"His Hero"	Larry Leichliter	Kent Osbourne Niki Yang Adam Muto	September 20, 2010 (2010-09-20)	692-026	1.83
The great warrior Billy inspires Finn and Jake to practice nonviolence, but the duo finds it difficult to resist old ways. Guest voice: Lou Ferrigno as Billy.
13b	13b	"Gut Grinder"	Larry Leichliter	Bert Youn Ako Castuera	September 27, 2010 (2010-09-27)	692-024	1.77
Finn and Jake pursue a havoc-wreaking "Gut Grinder", but Jake suspects he himself might be the culprit.

Season 2: 2010–2011

#	#	Title	Directed by	Written and storyboarded by	Original U.S. airdate	Production code	No. of U.S. viewers (in millions)
14a	1a	"It Came from the Nightosphere"	Larry Leichliter	Adam Muto Rebecca Sugar	October 11, 2010 (2010-10-11)	1002-029	2.001
Finn releases Marceline's estranged father from the Nightosphere, but ends up having to stop him from stealing all the souls in Ooo. Guest voice: Martin Olson as Hunson Abadeer. Note: This episode was also nominated for an Emmy.
14b	1b	"The Eyes"	Larry Leichliter	Kent Osborne Somvilay Xayaphone	October 18, 2010 (2010-10-18)	1002-031	2.264
Finn and Jake are kept awake by a horse that does nothing but stare at them with its big eyes.
15a	2a	"Loyalty to the King"	Larry Leichliter	Kent Osborne Somvilay Xayaphone	October 25, 2010 (2010-10-25)	1002-027	2.541
The Ice King shaves his beard after a princess "breaks up" with him, but when his new look proves to attract other princesses, he capitalizes on the unexpected opportunity.
15b	2b	"Blood Under the Skin"	Larry Leichliter	Cole Sanchez Benton Conner	November 1, 2010 (2010-11-01)	1002-028	1.952
After receiving a splinter on his finger, Finn seeks the Magical Armor of Zelderon for protection, but cannot take the embarrassment. Guest Voice: Peter Stormare as Sir Slicer.
16a	3a	"Storytelling"	Larry Leichliter	Ako Castuera Tom Herpich	November 8, 2010 (2010-11-08)	1002-030	2.148
While sick and stuck in bed, Jake wants Finn to tell him a story to make him feel better. Guest voice: Kristen Schaal as Boobafina and Sam Marin as Teenage Bear.
16b	3b	"Slow Love"	Larry Leichliter	Cole Sanchez Benton Conner	November 15, 2010 (2010-11-15)	1002-032	2.090
Finn and Jake try to woo a group of lady snails in order to save their house from a giant slug named Snorlock, who was using it as a shell. Guest voice: Biz Markie as Snorlock.
17a	4a	"Power Animal"	Larry Leichliter	Adam Muto Rebecca Sugar	November 22, 2010 (2010-11-22)	1002-033	2.228
Jake must stay focused in order to rescue Finn, who has been kidnapped by a gang of evil gnomes bent on turning Ooo literally upside down. Guest voice: Paul Reubens as the Gnome Ruler.
17b	4b	"Crystals Have Power"	Larry Leichliter	Cole Sanchez Jesse Moynihan	November 29, 2010 (2010-11-29)	1002-036	2.002
Finn and Jake visit a crystal dimension ruled by Tree Trunks, who turns Finn into a crystal boy. Jake must save Finn from Tree Trunks.
18a	5a	"The Other Tarts"	Larry Leichliter	Ako Castuera Tom Herpich	January 3, 2011 (2011-01-03)	1002-038	1.974
Finn and Jake volunteer to help Princess Bubblegum with a dangerous assignment: toting rare and delicious tarts for the Annual Royal Back Rubbing Ceremony. Guest voice: Stephen Root as the Royal Tart Toter.
18b	5b	"To Cut a Woman's Hair"	Larry Leichliter	Kent Osborne Somvilay Xayaphone	January 10, 2011 (2011-01-10)	1002-035	1.886
Finn must get a lock of hair from a princess to save Jake from the balding Tree Witch, but this task proves harder than expected. Guest Voice: Thurop Van Orman as the Tree Witch.
19a	6a	"The Chamber of Frozen Blades"	Larry Leichliter	Adam Muto Rebecca Sugar	January 17, 2011 (2011-01-17)	1002-037	—
Finn and Jake await for the Ice King and Gunther to return to the kingdom, thinking that he is coming back with a stolen princess, and find the Ice King's secret sanctum.
19b	6b	"Her Parents"	Larry Leichliter	Ako Castuera Tom Herpich	January 24, 2011 (2011-01-24)	1002-034	2.177
Jake's relationship with Lady Rainicorn is in danger when he promises to meet with her parents, as both species had a long history of war with each other. Guest voices: Henry Rollins and Laura Silverman as Lady Rainicorn's parents.
20a	7a	"The Pods"	Larry Leichliter	Kent Osborne Somvilay Xayaphone	January 31, 2011 (2011-01-31)	1002-039	1.944
Finn and Jake are assigned to protect three magical beans, but have problems figuring which of the beans is evil.
20b	7b	"The Silent King"	Larry Leichliter	Jesse Moynihan Cole Sanchez	February 7, 2011 (2011-02-07)	1002-040	1.532
Finn becomes the king of a goblin clan in order to prevent a conflict of violence, but their strange rules prove to be not of his liking. Guest voices: Michael J. Anderson as Gummy, the Royal Goblin Chief of Staff.
21a	8a	"The Real You"	Larry Leichliter	Adam Muto Rebecca Sugar	February 14, 2011 (2011-02-14)	1002-041	1.825
Finn has to give a speech at Princess Bubblegum's science barbecue and seeks a quick fix to make himself smarter.
21b	8b	"Guardians of Sunshine"	Larry Leichliter	Ako Castuera Tom Herpich	February 21, 2011 (2011-02-21)	1002-042	1.729
Finn and Jake get sucked into one of Beemo's games and they have to defeat all three of his bosses.
22a	9a	"Death in Bloom"	Larry Leichliter	Cole Sanchez Jesse Moynihan	February 28, 2011 (2011-02-28)	1002-044	1.981
After killing Princess Bubblegum's plant when left to take care of it, Finn and Jake make a trip to the Land of the Dead in order to get its soul back. Guest voice: Miguel Ferrer as Death.
22b	9b	"Susan Strong"	Larry Leichliter	Adam Muto Rebecca Sugar	March 7, 2011 (2011-03-07)	1002-045	2.378
Finn is excited to discover what appears to be a tribe of humans living underground near the Candy Kingdom, but gets more than he expected when he tries to teach one of them about the surface world. Guest voice: Jackie Buscarino as Susan Strong.
23a	10a	"Mystery Train"	Larry Leichliter	Kent Osborne Somvilay Xayaphone	March 14, 2011 (2011-03-14)	1002-043	1.958
Wanting to surprise Finn on his 13th birthday, Jake takes Finn on a train, where they get wrapped up in a murder mystery. Note: Finn says a cuss word in this episode, but it has been bleeped out by the locomotive's whistle.
23b	10b	"Go with Me"	Larry Leichliter	Ako Castuera Tom Herpich	March 28, 2011 (2011-03-28)	1002-046	1.270
Marceline and Jake give Finn advice so he can ask Princess Bubblegum to see a movie with him.
24a	11a	"Belly of the Beast"	Larry Leichliter	Kent Osborne Somvilay Xayaphone	April 4, 2011 (2011-04-04)	1002-047	1.640
In order to cure the stomach ache of a giant, Finn and Jake must break up a party happening in his belly. Guest voice: Andy Samberg as Party Pat.
24b	11b	"The Limit"	Larry Leichliter	Cole Sanchez Jesse Moynihan	April 11, 2011 (2011-04-11)	1002-048	1.693
Finn and Jake must risk it all to see their dreams come true at the center of a magic wish-granting maze.
25a	12a	"Video Makers"	Larry Leichliter	Kent Osborne Somvilay Xayaphone	April 18, 2011 (2011-04-18)	1002-051	1.733
Finn and Jake are on an epic race to make a movie for their "Finn and Jake Movie Club", but end up arguing over the film's plot- whether it should be a romantic comedy (Jake's idea) or an action/adventure (Finn's idea).
25b	12b	"Heat Signature"	Larry Leichliter	Ako Castuera Tom Herpich	May 9, 2011 (2011-05-09)	1002-050	1.975
Marceline pranks Finn and Jake into thinking that they're vampires, but then her ghost friends start to take things too far and try to kill them. Guest voices: Brian Baumgartner, Toby Huss, and Kate Micucci as Marceline's ghost friends.
26a	13a	"Mortal Folly"	Larry Leichliter	Rebecca Sugar Adam Muto	May 2, 2011 (2011-05-02)	1002-049	1.920
Finn and Jake must go on a quest to find the Lich, while the Ice King pesters them for their blessing to marry Princess Bubblegum. Guest voice: Ron Perlman as The Lich.
26b	13b	"Mortal Recoil"	Larry Leichliter	Cole Sanchez Jesse Moynihan	May 2, 2011 (2011-05-02)	1002-052	1.920
Following the events in the previous episode, Princess Bubblegum is put into the hospital after accidentally being dropped into the Lich's well of power by the Ice King. But when the spirit of The Lich possesses Bubblegum, Finn and Jake team up with the Ice King to stop him. Guest voices: Kevin Michael Richardson as Lich-possessed Princess Bubblegum and Isabella Acres as Young Princess Bubblegum.

Season 3: 2011–2012

#	#	Title	Directed by	Written and storyboarded by	Original U.S. airdate	Production code	No. of U.S. viewers (in millions)
27a	1a	"Conquest of Cuteness"	Larry Leichliter	Ako Castuera Tom Herpich	July 11, 2011	1008-053	2.686
Finn and Jake meet the "evil" Cute King and the Cuties, and the cuties want to kill them.
27b	1b	"Morituri te Salutamus"	Larry Leichliter	Adam Muto Rebecca Sugar	July 18, 2011	1008-054	2.528
Finn and Jake become trapped in an arena of gladiator ghosts. Note: The title is Latin for: "We who are about to die salute you."
28a	2a	"Memory of a Memory"	Larry Leichliter	Ako Castuera Tom Herpich	July 25, 2011	1008-057	2.255
Finn and Jake are transported into Marceline's mind to wake her from a magically induced sleep. Guest voices: Steve Agee as Ash, Ava Acres as young Marceline.
28b	2b	"Hitman"	Larry Leichliter	Jesse Moynihan Bert Youn	August 1, 2011	1008-055	2.273
After being grounded by Finn and Jake, the Ice King unwittingly hires a hitman to go after them.
29a	3a	"Too Young"	Larry Leichliter	Tom Herpich Jesse Moynihan	August 8, 2011	1008-059	2.089
The Earl of Lemongrab tries to claim the throne from a thirteen-year-old Princess Bubblegum. Guest voices: Justin Roiland as the Earl of Lemongrab and Isabella Acres as Young Princess Bubblegum.
29b	3b	"The Monster"	Larry Leichliter	Kent Osborne Somvilay Xayaphone	August 15, 2011	1008-056	2.242
On a quest from her parents, Finn and Jake track Lumpy Space Princess to a village being terrorized by a monster.
30a	4a	"Still"	Larry Leichliter	Kent Osborne Somvilay Xayaphone	August 22, 2011	1008-060	2.292
The Ice King paralyzes Finn and Jake with a potion and tries to become friends with them. Meanwhile, Finn tries to summon an astral beast for help.
30b	4b	"Wizard Battle"	Larry Leichliter	Ako Castuera Jesse Moynihan	August 29, 2011	1008-061	2.302
Finn, Jake, and the Ice King enter a wizard contest, with the winner receiving the newly restored Princess Bubblegum's kiss. Guest voice: Maurice LaMarche as the Grand Master Wizard.
31a	5a	"Fionna and Cake"	Larry Leichliter	Adam Muto Rebecca Sugar	September 5, 2011	1008-058	3.315
Based on an idea by Adventure Time crew member Natasha Allegri to have an episode with all gender-switched characters. The titular Fionna and Cake, a human girl and her cat, replace Finn and Jake as they battle the Ice Queen to save Prince Gumball and the Candy Kingdom. In the midst of the Ice Queen's latest plan, Fionna must also reconcile her feelings for Prince Gumball and who she is: as an adventurer. Guest voices: Madeleine Martin as Fionna, Roz Ryan as Cake, Grey DeLisle as the Ice Queen, and Neil Patrick Harris as Prince Gumball.
31b	5b	"What Was Missing"	Larry Leichliter	Adam Muto Rebecca Sugar	September 26, 2011	1008-062	2.185
Finn (beatboxing), Jake (playing viola), Princess Bubblegum (playing Beemo as an 8-bit instrument) and Marcelline (playing bass guitar) form a band in order to defeat the Door Lord and recover what was stolen from them. Note: The episode became somewhat controversial because of an allegedly implied relationship from the past between Marceline and Princess Bubblegum. The accompanying "Mathematical" video recap caused more controversy about these implied lesbian relations between Princess Bubblegum and Marceline by making it seem as if the writing staff actively seeks input from fans. This incident was addressed by the show's producer, Fred Seibert, and the video was pulled. Soon after the video was pulled, the entire channel was pulled off Youtube.
32a	6a	"Apple Thief"	Larry Leichliter	Bert Youn Tom Herpich	October 3, 2011	1008-067	1.996
Tree Trunks' apples have been stolen and Finn and Jake dive into the slums of the Candy Kingdom to find the thief. Guest voices: Rich Fulcher as Jaybird and Ron Lynch as Pig.
32b	6b	"The Creeps"	Larry Leichliter	Ako Castuera Jesse Moynihan	October 17, 2011	1008-070	2.025
Halloween Special 1: Finn, Jake, Princess Bubblegum, Lumpy Space Princess, Beemo, and Cinnamon Bun are invited to a masquerade ball hosted by a mysterious "ghost" who threatens to kill everyone, so Finn tries to find the "killer".
33a	7a	"From Bad to Worse"	Larry Leichliter	Kent Osborne Somvilay Xayaphone	October 24, 2011	1008-064	2.216
Halloween Special 2: Princess Bubblegum's zombie formula from "Slumber Party Panic" re-infects the Candy Kingdom due to Cinnamon Bun's carelessness. Finn, Jake, Lady Rainicorn and Lumpy Space Princess must attempt to re-create the cure.
33b	7b	"Beautopia"	Larry Leichliter	Adam Muto Rebecca Sugar	November 7, 2011	1008-065	2.417
Susan Strong returns and she needs help from Finn and Jake to protect her home from "Lub-Glubs". Guest voice: Jackie Buscarino as Susan Strong.
34a	8a	"No One Can Hear You"	Larry Leichliter	Ako Castuera Jesse Moynihan	November 14, 2011	1008-066	1.830
After a deer knocks him unconscious, Finn wakes up to find that the Candy Kingdom is deserted and Jake has gone insane.Also Finn has to deal with both legs being broken and in casts. Note: at one point Finn removes his hat and reveals his blond hair.
34b	8b	"Jake vs. Me-Mow"	Larry Leichliter	Adam Muto Rebecca Sugar	November 21, 2011	1008-071	2.683
A small cat and assassin named Me-Mow blackmails Jake to kill Wildberry Princess by hiding in his nose and threatening to inject him with poison if he doesn't. Note: Me-Mow is based off a fan drawing. Guest Voice: Kyla Rae Kowalewski as Me-Mow
35a	9a	"Thank You"	Larry Leichliter	Tom Herpich	November 23, 2011	1008-063	2.332
Thanksgiving Special: A Snow Golem and a Firewolf strike up a strange friendship as Finn and Jake battle through Ice King's "impenetrable armor". The action between Finn & Jake, and the Ice King takes place mostly in the background.
35b	9b	"The New Frontier"	Larry Leichliter	Tom Herpich Bert Youn	November 28, 2011	1008-072	—
After Jake has a prophetic "croak dream" showing his death, Finn goes to make sure it doesn't happen. Guest Voice: "Weird Al" Yankovic as the Banana Man
36a	10a	"Holly Jolly Secrets (Part I)"	Larry Leichliter	Kent Osborne Somvilay Xayaphone	December 5, 2011	1008-068	—
Holiday Special Part 1 : Finn and Jake stumble across the Ice King’s video diary and look to uncover his secrets but when Ice King finds out he gets angry. Note: This episode reveals the painful past of the Ice King and why he has his obsession over princesses.
36b	10b	"Holly Jolly Secrets (Part II)"	Larry Leichliter	Kent Osborne Somvilay Xayaphone	December 5, 2011	1008-069	—
Holiday Special Part 2 : Ice King is trying to get the video diaries back from Finn and Jake and they have to uncover Ice King's biggest secret ever.
37a	11a	"Marceline's Closet"	Adam Muto (creative) Larry Leichliter	Ako Castuera Jesse Moynihan	December 12, 2011	1008-073	2.504
Finn and Jake hide from Marceline in her own closet.
37b	11b	"Paper Pete"	Adam Muto (creative) Larry Leichliter	Kent Osborne Somvilay Xayaphone	January 16, 2012	1008-075	—
While Jake reads up on Rainicorn history, Finn and the Pagelings defend the books of the library. Guest voice: Peter Browngardt as Paper Pete
38a	12a	"Another Way"	Adam Muto (creative) Larry Leichliter	Tom Herpich Bert Youn	January 23, 2012	1008-076	—
Finn is scared by clown nurses who want to heal his foot, so he seeks out the magical tears of a cyclops.
38b	12b	"Ghost Princess"	Nate Cash (creative) Larry Leichliter	Ako Castuera Jesse Moynihan	January 30, 2012	1008-077	—
The guys play detective and try to find Ghost Princess' murderer so she can stop haunting. Along the way, Ghost Princess falls in love with a ghost name Clarence, who, to everyone's (even Clarence's) horor, is the one who murdered her. Note: Sam Marin guest stars as Clarence's ghost.
39a	13a	"Dad's Dungeon"	Larry Leichliter	Pendleton Ward Adam Muto Natasha Allegri	February 6, 2012	1008-078	—
Jake's dad presents a strange challenge to the guys when he appears to them in a holographic message.
39b	13b	"Incendium"	Adam Muto (creative) Larry Leichliter	Adam Muto Rebecca Sugar	February 13, 2012	1008-074	—
Trying to help a brokenhearted Finn, Jake seeks the Flame King's consent for Finn to date his daughter, the Flame Princess. Guest voices: Keith David as Flame King. Note: Jessica DiCicco joins the recurring cast as Flame Princess.

Season 4: 2012–TBA

On May 2, 2011, Pendleton Ward announced on his official Twitter page that a fourth season of Adventure Time was in the works. The 100th episode of the series, titled "The Hard Easy," is to be an episode in that season, written by Tom Herpich and Skyler Page. The fourth season premiered in April with the episode "Hot to the Touch".

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#	#	Title	Directed by	Written and storyboarded by	Original U.S. airdate	Production code	No. of U.S. viewers (in millions)
40a	1a	"Hot to the Touch"	Adam Muto (creative) Larry Leichliter	Cole Sanchez Rebecca Sugar	April 2, 2012 (2012-04-02)	1008-082	2.655
Following the previous episode, Finn develops a crush on Flame Princess and tries to get to know her, which proves difficult due to her destructive and uncontrollable power. Guest voices: Andy Milonakis as N.E.P.T.R.
40b	1b	"Five Short Graybles"	Nate Cash (creative) Larry Leichliter	Tom Herpich Skyler Page Cole Sanchez	April 9, 2012 (2012-04-09)	1008-079	—
A series of short stories all centered around a common theme, hosted by a mysterious man named Cuber from the future. Guest voice: Emo Philips as Cuber
41a	2a	"Web Weirdos"	Nate Cash (creative) Larry Leichliter	Ako Castuera Jesse Moynihan	April 16, 2012 (2012-04-16)	1008-081	—
Finn finds himself playing marriage counselor to a couple of grumpy arachnids after he and Jake get trapped in a massive spider web. Guest voices: Bobcat Goldthwait as Ed, Susie Essman as Barb
41b	2b	"Dream of Love"	Adam Muto (creative) Larry Leichliter	Bert Youn Somvilay Xayaphone	April 23, 2012 (2012-04-23)	1008-080	—
Tree Trunks is courted by an oinking suitor, but much to Jake’s dismay, this interferes with her baking habits. Guest voice: Ron Lynch as Pig
42a	3a	"Return to the Nightosphere"	Nate Cash (creative) Larry Leichliter	Ako Castuera Jesse Moynihan	April 30, 2012 (2012-04-30)	1008-085	—
Part 1 of a two-part episode. Finn and Jake awaken in the dreaded Nightosphere, and buried under a pile of bananas, with no recollection of how they arrived. They seek out the underworld's leader, Marceline's father, who apparently is the one who imprisoned them in the first place. Guest voice: Martin Olson as Hunson Abadeer
42b	3b	"Daddy's Little Monster"	Adam Muto (creative) Larry Leichliter	Cole Sanchez Rebecca Sugar	April 30, 2012 (2012-04-30)	1008-086	—
Part 2 of a two-part episode. Using Jake's phone, Finn and Jake recall how they got to the Nightosphere and the recent relations between Marceline and Hunson. But what's with the bananas and why are the Nightosphere's monsters so repulsed by them? Guest voice: Martin Olson as Hunson Abadeer
43a	4a	"In Your Footsteps"	Nate Cash (creative) Larry Leichliter	Tom Herpich Skyler Page	May 7, 2012 (2012-05-07)	1008-083	—
A bear befriends Finn and Jake. Jake, however, thinks he's trying to steal Finn's identity.
43b	4b	"Hug Wolf"	Adam Muto (creative) Larry Leichliter	Bert Youn Somvilay Xayaphone	May 14, 2012 (2012-05-14)	1008-084	—
After an encounter with an Alpha Hug Wolf, Finn goes through a werewolf-like transformation, turning into a Beta Hug Wolf.
44a	5a	"Princess Monster Wife"	Adam Muto (creative) Larry Leichliter	Bert Youn Somvilay Xayaphone	May 28, 2012 (2012-05-28)	1008-088	—
When Ooo’s princesses start losing body parts left and right, Finn and Jake investigate. They confront the Ice King, who shows them a princess he made out of the missing body parts, which makes them faint every time they see it.
44b	5b	"Goliad"	Nate Cash (creative) Larry Leichliter	Tom Herpich Skyler Page	June 4, 2012 (2012-06-04)	1008-087	—
Princess Bubblegum is concerned over her mortality and reveals her designated successor to Finn and Jake. Guest Voice: Graham Linehan's daughter as Goliad
45a	6a	"Beyond This Earthly Realm"	Nate Cash (creative) Larry Leichliter	Jesse Moynihan Ako Castuera	June 11, 2012 (2012-06-11)	1008-089	—
When Finn finds a porcelain lamb, it transports him into the spirit world and only the Ice King can help get him out.
45b	6b	"Gotcha!"	Adam Muto (creative) Larry Leichliter	Rebecca Sugar Cole Sanchez	June 18, 2012 (2012-06-18)	1008-090	—
In order to do research for her tell-all memoir about men, Lumpy Space Princess goes undercover working for Finn and Jake.
46a	7a	"Princess Cookie"	Nate Cash (creative) Larry Leichliter	Tom Herpich Skyler Page	June 25, 2012 (2012-06-25)	1008-091	—
Finn and Jake are called to solve a Candy Kingdom hostage crisis when a rogue cookie takes over. Guest Voice: Donald Faison as Baby-Snaps
46b	7b	"Card Wars"	Unknown	Unknown	July 16, 2012 (2012-07-16)	1009-092	—
47a	8a	"Sons of Mars"	Unknown	Unknown	July 23, 2012 (2012-07-23)	1010-093	—
47b	8b	"Burning Low"	Unknown	Unknown	July 30, 2012 (2012-07-30)	1011-094	—

Unscheduled episodes

Prod. code	Title
1008-095	B-Mo Noire
1008-096	Worm King
1008-097	Who Would Win?
1008-098	Lady & Peebles
1008-099	You Made Me!
1008-100	The Hard Easy
1008-101	Ignition Point
1008-102	Reign of Gunthers
1008-103	Help
1008-104	The Lich

Season 5: TBA

A fifth season is in production.

Season 6: TBA

One of the show's storyboarders, Jesse Moynihan, has suggested there will be a sixth season.