The Ice King and Marceline bond over song and memories.

An unexpected revelation from Susan leads Finn closer to answers about his past.

Finn and his friends journey to a last refuge called Founders Island.

After a magic spell backfires, the Ice King reverts back to Simon, and seeks help from Finn, Jake, and Marceline in order to get Betty, his former fiancée, back.

When Finn starts sleepwalking and dreaming about the Green Lady he filed away in his memory vault, Jake and BMO help him tap into his repressed memories to uncover a secret past. Who is the Green Lady? And how is she connected to Finn?

Finn and Jake follow the Lich to the Citadel, where Finn meets his long lost dad. But just how far does the apple fall from the tree?

As the sun rises on her last day, Marceline recalls her long extraordinary life.

Part 3 of a three-part episode. Finn and Jake chase the Lich through a dimensional portal and meet a wishmaster. After the Lich wishes that humanity never existed, Finn wishes that the Lich never existed.

BMO accidentally deletes his core system files. Finn and Jake disguise themselves as MOs to infiltrate the MO factory and save BMO from a memory wipe.

Finn and his friends must come together as a genuine band in order to open the gate of the Door Lord and get back their taken items.

Following an ally's memorial service, Jake begins acting strangely.

While exploring some futuristic ruins, Susan sees glimpses of a familiar girl.

Trapped and alone, Finn must unravel the riddle of the weird cave with no exit.

The Snow Golem visits the Fire Kingdom and finds an unlikely follower.

The final confrontation begins. Who will survive?

A visit from the Lich King sheds light on Ooo's secrets.

The Ice King summons an army of snowmen to recover the secret tapes Finn and Jake are watching. They must work against the clock to find out the secrets enclosed within.

Princess Bubblegum recovers from being dropped in the Well of Power by the Ice King; however, she is altered and her condition leads to an unlikely final showdown with one of the greatest evils in order to save all life in Ooo.

When the Lich is accidentally freed from its amber prison in Princess Bubblegum's Castle, Finn and Jake must head forth to stop it from regaining its full power, all while being pestered by the Ice King to give him their blessing to marry Princess Bubblegum.

In order to find Finn's father, Finn and Jake must commit a cosmic crime...unless the Lich beats them to it.

Finn, Jake and Orgalorg converge with the comet and meet their destiny.

While dwelling on a joke he told to Flame Princess, Finn finds himself trapped in a strange pillow world.

Finn finds the hero Billy's bucket list and decides to complete the unfinished items as a final tribute.

Jake embarks on a solo mission to help a broken-hearted Finn.

Finn and Jake enter Marceline's mind to awaken her from a sleep spell she had cast on herself, without knowing that they are being tricked by a person from her past.

Princess Bubblegum may be jealous when Finn start hanging out with Flame Princess.

Jake wants to fulfill a bizarre lifelong ambition.

Finn and Jake puzzle over the nature of a mysterious newcomer.

Finn and Fern's carefree visit to some old ruins turns disastrous.

Finn and Jake crossover into Farmworld Finn's dimension.

In a distant age, the wizard Evergreen quests to save the world.

Finn and Jake decide it's time for Finn to get a new sword. Finn reluctantly buys a grass sword from a mysterious old man, but the sword turns out to be cursed! And unfortunately for our hero, all sales are final.

While Princess Bubblegum searches for a cure for Marceline, Finn and Jake take on one of the Vamps themselves.

Finn receives a bag full of miniature versions of his friends.

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.

Five foes from Marceline's past come back to cause trouble for the Land of Ooo.

On the eve of battle, Marceline's archenemy comes to her with a strange proposal.

Jake crafts the most delicious sandwich ever, but when Magic Man steals it, Finn must defy the laws of space and time to win back Jake's creation.

Finn and Jake play Cloud Hunt in Marceline's house, but they get trapped in her closet after she comes home.

In this gender-swapped episode, Fionna and Cake must battle the evil Ice Queen.

Finn, Jake, Marceline, and PB set out to hunt down the Vamps. But who is hunting them?

Finn develops a crush on Flame Princess and tries to get to know her, which proves difficult due to her destructive power.

The Earl of Lemongrab takes over the Candy Kingdom due to Princess Bubblegum's age regression, forcing her and Finn to try and get rid of him even if it means a life-altering decision.

Finn practices his sword fighting skills at the candy junkyard, where he meets an old gumball robot named Rattleballs. To Finn's shock, he finds out he's not the master swordsman he thinks he is. What the what?! Finn begs Rattleballs to train him, but he soon discovers his mentor's deep, dark secret... a secret that will ultimately test Finn's loyalty to Princess Bubblegum.

Root Beer Guy works a boring job during the day and tries to write mystery stories at night. But his life is about to change when he witnesses Finn and Jake kidnapping Princess Bubblegum! There's only one problem: no one believes Root Beer Guy...

While searching for old human artifacts, Jake, Finn, and Susan Strong meet Tiffany, who is employed by a mysterious Doctor Gross.

Jake's dad presents a strange challenge to the guys when he appears to them in a holographic message, telling them about a dungeon he made for them.

Finn and Jake play Card Quest, an epic game.

A long lost artifact causes Princess Bubblegum to harken back to the creation of the Candy Kingdom.

All aboard! Finn and Jake discover a train where every car is a dungeon filled with a new foe for Finn to fight. Jake quickly gets bored and wants to leave, but Finn is having the best time and doesn't want to leave... ever!

After Susan Strong's chip is activated, she goes rogue and attacks Finn.

When one of her oldest adversaries targets the Ice Kingdom, Marceline rushes to Simon's rescue.

Finn and Jake travel to a land where reality has been redesigned and improved.

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.

Finn and Jake hunt a shadowy predator and Marceline asks Princess Bubblegum for a favor.

Marceline's evil father goes on a soul-sucking rampage after Finn and Marceline accidentally release him from the Nightosphere.

Part 2 of a three-part episode. Finn and Jake chase the Lich through a dimensional portal and meet a wishmaster. After the Lich wishes that humanity never existed, Finn wishes that the Lich never existed.

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 it's soul back.

Finn and Jake are called to solve a Candy Kingdom hostage crisis when a rogue cookie takes over.

Ice King suffers a heartbreaking loss and it's up to Finn and Jake to find the culprit.

After seeing Marceline the vampire queen torment an elderly henchman, Finn steps in to be her new henchman, doing whatever he is told to do.

Finn has to give a speech at Princess Bubblegum's science barbecue and seeks a quick fix to make himself smarter.

When Ice King's magic crown goes haywire, Marceline and Princess Bubblegum resort to extreme measures to help him.

Kim Kil Whan tasks Jake and Finn to investigate reports of a haunting in one of Kim Kil Whan's properties "Joshua and Margaret Investigations" since something in there traumatized his top employee Renny Hamlond and does not pay any rent for inhabiting the place.

Jake's a daddy, but being a father and keeping his rainicorn pups from killing themselves or each other is a lot harder than he imagined.

Finn hears a mysterious song while judging a Battle of the Bands.

A mysterious craft invades Ooo and Finn believes it may hold the secrets to his past.

In order to fulfill his grand destiny, Jake is spirited away by a strangely familiar shape-shifting alien.

Finn doesn't like any of the new arms the princesses give him, so he builds a tower into space to find his dad and get his old arm back. But are his hopes up a little too high?

Bubblegum turns to Marceline's help when something threatens the citizens of her homestead.

Wanting to surprise Finn on his birthday, Jake takes Finn on a train, where they get wrapped up in a murder mystery.

Finn and Jake attempt to rescue Marceline and find out what's making her behave so strangely.

Doctor Princess thrusts a great responsibility upon Finn. Jake goes adventuring with a new friend.

BMO makes his way home after being snatched by an eagle. On its way, BMO meets Bubble and a baby, and the three decide to journey home together.

Finn and Jake storm Magic Man's house to rescue his new apprentice.

Finn's spirit is drawn into the astral plane by the power of the mysterious comet.

Finn and Jake search the land of Ooo for a new home after Marceline claims the duo's treehouse as her own.

Finn and Jake's parents hunt an unearthly menace in the woods.

Marceline tracks the Sky Witch, but finds out that she may need Princess Bubblegum's help.

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

When the Fire Kingdom is struck by a natural disaster, Flame Princess turns to an unlikely ally.

When an old flame comes calling on urgent business, Tree Trunks reconsiders both her wild past and her tranquil present.

Slime Princess needs a husband or else she'll lose the Slime Kingdom to her obnoxious sis. Finn steps in to save the day, but first they will need to win a series of Love Games to prove to Slime Princess's dad that they are really in love. This is definitely not what Finn signed up for!

Finn and Jake agree to help a snail named Snorlock find a girlfriend.

Tree Trunks and Mr. Pig are celebrating the wedding of the year.

Finn and Jake attempt to track down President Porpoise before Vice President Blowfish takes over.

Princesses lose body parts under mysterious circumstances.

Ice King has a plan to form a perfect circle of confidants.

The arrival of a visitor causes Cherry Cream Soda's life to fall flat.

When Tree Trunks's apples go missing, she, Finn and Jake descend into the dark side of the Candy Kingdom in order to find the thief.

The guys challenge a monster to a fight but end up battling each other.

When Finn gets trapped in a giant spider web, he ends up playing marriage counselor to a couple of grumpy arachnids.

In order to do research for her tell-all memoir about men, Lumpy Space Princess goes undercover working for Finn and Jake.

The beautiful and sensitive Lumpy Space Prince flees his cruel parents to start a new life.

An otherworldly encounter puts Tree Trunks on the trail of a conspiracy in the Candy Kingdom.

Big money problems send Finn and Jake to Wildberry Kingdom.

Once a month, while Jake's asleep, his tail stretches out of the tree house to go work as a clown in a traveling bug circus.

Lemongrab and Finn go on an expedition through the Mountain of Matthew.

A fed up Lumpy Space Princess leaves the woods for a glamorous career in babysitting.

It's Princess Day in Ooo! You know what that means? Yep, LSP and Marceline team up to prank Breakfast Princess!

Tree Trunks and Mr. Pig's child, Sweet P, runs into trouble on his first day of school.

Finn takes a group of at-risk Candy Kingdom youth on a camping trip they’ll never forget.

The loyalty of Finn and Jake comes into question when the King of Ooo orders them to intercept a flying mushroom.

When disaster befalls James Baxter, it’s up to Finn and Jake to help him pick up the pieces.

Finn meets the Box Prince—a cat with a box on its back—and learns that the Box Kingdom has been taken over by an imposter. Finn must therefore help the real Box Prince reclaim the throne.

Finn and Jake try to help an obnoxious grass ogre named Donny develop better social skills, only to find out Donny's jerky behavior protects the house people from the why-wolves, which eat the house people.

Love is in the air when Lumpy Space Princess reconnects with an old classmate, but will her jealousy get in the way of finding true love?

The Ice King gets married but not before he convinces Finn and Jake to throw him a manlorette party.

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

Viola tries to get a part in LSP's play, but gets made into LSP's personal assistant instead.

A series of short stories with a common theme, hosted by a mysterious man named Cuber from the future. In this entry, Finn and Jake build a time machine. Meanwhile, Princess Bubblegum helps Cinnamon Bun overcome his fear of the dark.

Finn and Jake are excited to meet the Nice King who has come to Ooo. They soon realize that he looks suspiciously like someone else they know; the Ice King.

After being transformed into a foot, Finn joins forces with a band of misfits to make things right.

When Finn gets a splinter on his finger, he wants to get the best armor. In order to receive it, he must go on a quest to get the Magical Armor of Zelderon and survive one embarrassing situation after another.

On a field trip to the Candy Kingdom Museum of Natural History, Finn and Jake learn about the food chain by becoming the food chain!

Kim Kil Whan is worried about his daughter's future and asks Jake for some parental advice.

Finn goes through a transformation after a run-in with a hug wolf.

Cyclops tears may heal Finn and Jake's broken toes.

Library books seek help from Finn and Jake to save them from the evil Moldari.

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.

Ice King gets super jealous when he finds out that he wasn't invited to the Princess Potluck.

Finn's dad Martin the Human fights for freedom on a strange new planet!

A shadowy figure named Peace Master targets the Candy Kingdom elite.

BMO and Ice King hit the road as door to door salesmen and stumble upon an irresistible opportunity.

A series of short stories all centered around a common theme, hosted by a mysterious man named Cuber from the future.

Lumpy Space Princess is robbed, but before she is able to explain the details to Finn and Jake, she faints.

Finn's latest literary work meets with only derision, so he sets out to prove all the naysayers wrong.

Finn must travel to Lumpy Space to find a cure that will save Jake, who was accidentally bitten by Lumpy Space Princess at a tea party.

A bear cozies up to the guys, but his true intentions may be hidden.

Xergiok, the former Goblin king who was deposed by Finn and Jake claims to have turned over a new leaf.

After another one of his schemes fails, the Ice King decides to give up.

When the Ice King kidnaps a number of princesses he sees as potential brides, Finn and Jake team with the prisoners to set everybody free.

The king and queen of Lumpy Space ask Finn and Jake to bring their daughter back home. At the same time, they attempt to stop a "monster" from destroying a village.

Frog People seek protection from an evil lizard who's attacking their swamp.

In order to save Ooo, Finn and Jake must gather the four elemental gems. They go to the Slime Kingdom and have to gather Slime Princess's gem.

Finn and Jake join Tree Trunks in search for the rare Crystal Gem Apple, but question whether Tree Trunks has what it takes to adventure.

When the Fluffy People's gold has been devoured by a culprit only known as "The Gut Grinder", Finn and Jake team up to find him with his tracks.

Jake's son finds a hidden box and draws attention from a Rainicorn.

Jake's son TV discovers a lost diary and sets out to solve a decades-old mystery.

With a friendly bee named "Breezy" as his wingman, Finn decides to get back into the dating game.

Finn and Jake consider breaking up after a witch strips Jake of his powers.

Finn and Princess Bubblegum must protect the Candy Kingdom from a horde of candy zombies they accidentally created.

Finn and Jake stumble across a horse named James Baxter who has the ability to make sad people feel better.

After helping with the creation of a new sword, Hunson Abadeer comes back to try and regain his daughter's love.

Finn, Jake, and Princess Bubblegum are attacked by nasty goo monsters in the Desert of Wonders.

Finn and Jake must defend their home from the Cuties, a tiny race who believe themselves to be evil, destructive invaders.

Tired of all of Princess Bubblegum's talk about "responsibility," Lemonhope yearns for true freedom. So he sets off on the greatest adventure of his lemony life.

When Finn and Jake stumble into two different holes, they meet two different fates.

Finn and Jake find the Ice King's video diary and have a chance to unearth his secrets.

When Finn begins having nightmares about his missing Finn Sword, he wonders if they are real.

Finn and Jake follow their Sea Lard into the pond in front of their home, and in doing so, are led to a strange new world.

After defeating a evil king of goblins, Finn finds himself crowned as their new king. Unfortunately, he's unable to do anything for them due to the rules of the previous king including defending the goblins from the previous king.

Finn brings a pie-throwing robot to life, but the machine begins to long for a more fulfilling existence.

Ice King and a band of misfit wizards go on a mystical road trip.

Finn and Jake discover that Clone James has been faking his own death to collect medals. Now there are 25 Jameses running amok!

When Flame King breaks out of his prison and takes over the Flame Kingdom again, Flame Princess turns to the one person she believes she can trust... Finn! But will Finn be able to put his feelings for Flame Princess aside long enough to help her reclaim her throne?

When a Heart Guy named Ricardio comes to Candy Kingdom, Finn gets really jealous and finds a way to get him out of the Land of Ooo.

BMO convinces his friends to join him in a live action cowboy role-playing game.

Jake takes a pledge of nonviolence just before Finn is kidnapped by outlaws from the crystalline dimension.

Peppermint Butler thinks that Bubblegum is working too hard in her lab, so he tries to get her a suitor.

Finn must tell the truth when he accidentally turns Princess Bubblegum bald and green and blames the Duke of Nuts.

The great warrior Billy inspires Finn and Jake to practice nonviolence, but the duo finds it difficult to resist old ways.