Adventure Time with subtitle

Finn summons the Lord of Evil to reconcile with his daughter, Marceline the Vampire Queen, but ends up unleashing him of the unsuspecting land.

Because of a creepy horse outside their window, Finn and Jake cannot get any sleep.

After shaving, the Ice King is mistaken as a good guy and takes advantage of the situation.

Finn is made fun of by a group of knights and reacts by questing for a set of magical armor that will earn him respect.

Unable to give a sick Jake an entertaining story, Finn sets off into the woods to discover a true story.

Finn and Jake try to find a girlfriend for a giant snail so that it will stop wrecking their tree-house.

Finn is kidnapped, but Jake's short attention span means rescue is dubious.

Finn swears a life of non-violence right before a race of indestructible crystal-men abduct him to another dimension.

Finn and Jake are given one of the highest responsibilities: transporting and guarding the rarest pastry in the Candy Kingdom.

An evil witch threatens to crush Jake to death if Finn doesn't deliver her the hair of a princess.

While he's away, Finn and Jake sneak into Ice King's fortress.

Anxious about meeting Lady Rainicorn's parents, Jake tries to pass himself off as a Rainicorn.

Given the duty of protecting three magic beans, one evil and two good, Finn and Jake decide to plant them to find out which is which.

After defeating their king, Finn becomes the new ruler of the Goblin people, and finds that their strange ways are too difficult to understand.

Nervous about giving a speech at Princess Bubblegum's science conference and barbecue, Finn finds a magical pair of glasses that make him the smartest being in the land.

Finn and Jake become trapped inside one of BMO's video game creations.

After accidentally killing Princess Bubblegum's beloved plant, Finn and Jake travel to the land of the dead to bring it back to life.

Having always believed he is the only human left in the Land of Ooo, Finn believes he has discovered a tribe to primitive humans living underground.

While traveling on a train, Finn and Jake find themselves in the middle of a murder mystery.

Jake and Marceline give Finn conflicting advise on how to ask out Princess Bubblegum.

Finn and Jake must save a group of clueless, party-minded teddy bears living inside the belly of a monster.

An enormous maze tests the limit of Jake's stretching power.

Finn and Jake set out to make their own movie, but have conflicting visions of what their movie should be.

The Lich, the greatest form of pure evil in the land of Ooo, is accidentally unleashed. With the highest stakes, Finn and Jake set out on the most serious adventure of their career.

With the evil Lich seemingly defeated, Finn and Jake are uneasy with their success because of its great cost.

Finn and Jake come under attack in their home from a race of super-evil creatures which are too cute to be taken seriously.

Finn and Jake end up in a haunted arena where they must fight ghost gladiators to escape.

Finding their friend, Marceline the Vampire Queen, in a deep sleep, a mysterious stranger helps Finn and Jake by sending them into her dreams to awaken her.

The Ice King looks to hire a professional bully to beat up Finn and Jake, but inadvertently hires a deadly, unstoppable contract killer.

Finn is happy that Princess Bubblegum has regressed to the same age as him. But soon a challenger for the throne arrives to unseat the newly underage princess.

The king and queen of Lumpy Space ask Finn to find and return Lumpy Space Princess, who has been living in the woods and mistaken as a monster.

The Ice King uses a potion that paralyzes Finn and Jake, who become the lonely villain's unwilling best friends.

The Ice King enters a battle of wizards from all over the Land of Ooo, to win a kiss from Princess Bubblegum–which Finn and Jake look to prevent.

In a world where all the characters are opposite gender, the adventurer Fionna gets advice from her cat-friend Cake on her date with Prince Gumball.

In order to open a magic door filled with stolen items, Finn and all his friends must perform in a band. But everyone's differing musical tastes and overall tensions make things difficult.

After Tree Trunks finds her apples have gone missing, Finn and Jake search the criminal underworld of the Candy Kingdom to recover them.

Finn's masquerade birthday party turns into a deadly mystery.

The undead plague returns to the Candy Kingdom.

Susan Strong returns and asks Finn and Jake to save her people from the Glubs. But Finn is still not sure if he can trust her after last time.

After trying to stop a deer that has been licking the Candy Kingdom people, Finn wakes up in a hospital to find everyone missing expect Jake who is acting very strange.

A tiny cat assassin tries to black mail Jake into killing someone, by hiding in his nose with some poison.

A fire-breathing wolf cub becomes lost in the snowy woods and becomes unlikely friends with a tall snow-creature.

Jake has a dream that seems to foretell his death but, to Finn's dismay, doesn't take it serious.

In Finn and Jake's holiday special, the heroes come across a video diary of the Ice King's and attempt to decipher its secrets.

Bored waiting for her, Finn and Jake sneak into Marceline's house, become trapped when she comes home, and witness her strange behavior when she's alone.

A secret war takes place in the library between tiny paper people and mold creatures, and Finn is brought into the middle of it all.

Finn journeys for a cyclops's magical tears to cure his injuries, but have trouble because of his stubborn inability to follow the advice of others.

Finn and Jake try to help Ghost Princess by solving her murder.

Finn and Jake discover a lost message from their dad which sends them to a mysterious and dangerous dungeon.

Refusing to believe that she is evil, Finn tries to win over his new crush, Flame Princess.

Five short stories of Finn, Jake and their friends.

After being caught by a giant spider, Finn and Jake try and help the arachnid with its marital problems so they won't be eaten.

Tree Trunks finds love but her public displays of affection nauseate everyone around her.

Finn and Jake find themselves imprisoned in the dark realm of the Nightosphere with no memory of how they came to be there.

Continuing their mysterious quest in the Nightosphere, Finn and Jake must rescue their friend Marceline the Vampire Queen.

A cute, bumbling bear begins to follow and mimic Finn. At first Finn enjoys having the furry admirer, but soon becomes uneasy with the bear's devotion.

A Hug Wolf, a monstrous wolf that gives hugs against the will of its victims, turns Finn into one of its kind.

The Ice King steals various body parts from all the princesses to construct his own perfect princess bride.

Princess Bubblegum uses her own DNA to create an intelligent and immortal sphinx which is planned to one day succeed her to the throne, except that Finn and Jake accidentally affect those plans.

A magic curse turns Finn into a ghost, invisible to everyone but the Ice King.

Lumpy Space Princess sets out to write a book on how to catch a man and goes undercover as Finn and Jake's secretary in order to seduce Finn.

The Candy Kingdom faces a hostage crisis from a cookie that demands Princess Bubblegum's crown.

As Finn joins in on Jake's favorite, hyper-complicated card game, emotions and poor gamesmanship run high.

Magic Man switches bodies with Jake so that he can escape his trial on Mars, leaving it up to Finn to reveal the truth and save his friend.

Finn and Flame Princess cautiously begin a relationship as boyfriend and girlfriend, of which Princess Bubblegum disapproves.

BMO uses hard-boiled detective skills to locate Finn's missing sock.

Finn finds himself trapped in a bizarre dream, the outcome of which may determine if he ever wakes up.

Princess Bubblegum and Lady Rainicorn must rescue Finn and Jake.

The would-be usurper to the throne, Lemongrab, returns to the Candy Kingdom, demanding volunteer subjects for his own kingdom.

While training for an epic battle, Finn and Jake take their frustrations out in a fight against each other.

Finn and Jake sneak into the Fire Kingdom to retrieve some of Flame Princess' things, and stumble onto a plot to kill the Flame King.

A tribe of swamp creatures ask Finn and Jake to save them from a Mega Frog.

While the Ice King is away, his sidekick Gunther the penguin uses a magic amulet to conquer the countryside and attack the Candy Kingdom.

The Ice King asks Marcelline the Vampire Queen to help him write a song.

Finn's wish to stop the evil Lich has massive cosmic consequences.

Following the unexpected consequences of Finn's cosmic wish it's up to the Jake – and his short attention span – to set things right.

Five more short stories with one connecting theme.

Having been magical shrunk to the size of a forest animal, Finn takes up a quest to climb a tree and retrieve his lost flying disc.

Finn receives a mysterious bag that contains what appears to be living toys of everyone he knows, which playing with has unexpected results.

Lady gives birth to a litter of puppies and Jake becomes an eager but frantic father.

Finn becomes Davey, an alter-ego, everyman in order to escape the attention of fame and becomes consumed by his new identity.

Ice King, Neptr, Tree Trunks, Shelby and Lemongrab wake up in a dungeon and must work together to escape.

Lemongrab sends a distress message to the Candy Kingdom which Finn and Jake respond to.

Finn's hat comes to life.

A return to the gender-swapped world with Fionna and Cake and Marshall Lee the Vampire King.

Finn and Flame Princess explore a dungeon together.

Finn and Jake get lost in the badlands and are saved by Xergiok, ex-Goblin King who now lives in cave. A look at what Ice King and Marceline were like 996 years ago.

Marceline tells Finn and Jake about her and Ice King's past, 996 years ago.

Ice King creates a computer virus to delete everybody except him and Princess Bubblegum. Stuck inside the treehouse during a sword storm, Jake builds a pillow fort while Finn goes to a different world.

Depressed by his feelings with Flame Princess, Finn enters a pillow fort where he enters a new world and makes a new life for himself.

BMO gets snatched away by a giant eagle and must find his way home.

Ice King does everything possible to ruin a princess potluck he believes he didn't get invited to.

Finn and Jake meet a horse with the power to make sad people happy.

Finn and Jake hold a contest to see who can last longer without talking.

Peppermint Butler thinks Princess Bubblegum is spending too much time in her lab and decides she needs a suitor.

After becoming tired of always losing to Finn and Jake and failing to win Princess Bubblegum's love, Ice King decides to throw in the towel.

Jake Jr. gets mixed up with some bad eggs, and Jake reunites with his old gang to save her.

Five short stories, some involving Finn and Jake building a time machine.

Lumpy Space Princess is robbed and faints before she can tell Finn and Jake who robbed her.

Princess Bubblegum believes magic is nothing but a bunch of hooey until Starchy gets sick.

Jake is sick and tired of Finn using his body as a suit of armor.

Finn and Jake disguise themselves as MOs in order to infiltrate the MO factory.

Princess Bubblegum and Marceline team up to reclaim lost property.

After Flame Princess battles Ice King, Finn has an exciting dream.

Finn and Princess Bubblegum discover a talented lemon citizen named Lemonhope while on a diplomatic trip to Castle Lemongrab; also, something strange is happening to the Earls of Lemongrab, leading to their society crumbling.

Princess Bubblegum subjects Flame Princess to a series of tests to gauge Fire Princess' fiery tendencies.

Jake crafts the most delicious sandwich ever.

Jake and BMO help Finn tap into his repressed memories to uncover a secret past.

Slime Princess needs a husband or else she'll lose the Slime Kingdom to her obnoxious sister.

Finn and Jake discover a train where every car is a dungeon filled with a new foe for Finn to fight.

Finn meets the Box Prince (a cat with a box on its back) and discovers the Box Kingdom has been taken over by an impostor.

Finn, Jake and Marceline become trapped underground. Starving for anything red Marceline begins to loose control and turns her eyes to Finn and Jake's blood.

Finn and Jake find a broken down pick up truck and enlist the help of BMO and Banana Man to fix it.

Sick and tired of babysitting Ice King while the Ice Kingdom is being rebuilt, Finn and Jake call up an old friend to hang out with their annoying houseguest: Abracadaniel. But when Ice King and his new BFF accidentally unleash the demon Kee-Oth, Finn and Jake have to clean up their mess.

Kee-Oth the Blood Demon has kidnapped Jake, taken him back to his dimension and thrown him in a pit. If Finn wants to rescue his friend, he's going to need Lady Rainicorn's help… and a videotape that will reveal how to open the portal to Kee-Oth's messed-up dimension.

Finn and Jake accompany Princess Bubblegum on her study of the Desert of Wonders. However, they are soon attacked by goo monsters, and Finn and Jake think that Bubblegum's robot helper James is to blame.

Root beer guy must put aside his common everyday life to search for the truth behind the murders, lies, and deceit in the Candy Kingdom.

Tree Trunks and Mr. Pig are getting married.

Finn gets a new sword.

Jake meets an old robot in the junkyard who promises to make Jake into a master swordsman.

The Fire King and Don John the Flame Lord take over the Fire Kingdom. Now Flame Princess must use Finn's and Cinnamon Bun's help to get it back.

The Ice King looses his powers, reverts to his old human-self and begins to wither away after a thousand years of life.

'James', Finn & Jake, and Princess Bubblegum discover that James has been cloned 25 times, and that the original zombie James is returning - and not in a good way.

Finn isn't so happy with his arm replacements, made by the princesses and one time his strong emotions create a telekinetic limb by listening deep in his melon heart. In order to take revenge on his real father he decides to build a tower to the space. Jake is on his side, but P.B. tries to stop him. After Finn passes out at the atmosphere of Earth, P.B. pretends to be his father. When he faces the old guy, he won't punch him anymore. His arm disappear and he get the honor from Jake to ruin the monument.

Finn and Jake learn how the food chain works with a little help from Magic Man.

Big money problems send Finn and Jake to Wildberry Kingdom.

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

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

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

Jake kills a fly that gets into his soup. However, he and Finn must get creative when the fly returns as a powerful ghost to haunt them.

Jake is transported to a different world.

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

Jake wants to fulfill a bizarre lifelong ambition.

When Finn's toothache gets too much to take, he has no choice but to go see dentist.

Flame Princess asks Princess Bubblegum for help when her city is cooled down.

A slumber party is being held in the Candy Kingdom and Finn and Princess Bubblegum are sent to 7 minutes in Heaven.

Set in the Prehistoric Era, Evergreen and his aprentice Gunter have to stop a meteor heading towards Earth.

During his first day of school, Sweet Pea is approached by the King of OOO and his companion, Toronto, who lure him into dancing in public.

Finn's dream about following a comet to its crash site reunites him with an old friend.

Feeling unfulfilled, both Lemongrab and Finn take an introspective journey into the Mountain of Matthew. Inside, they are faced with their desires, their fears and themselves, and must make a pivotal choice.

Its the day of the month everyone loves. Super Porp Day (grape soda in a can). Fin, Jake, BMO and Marcy are skating and waiting at the local Squeez-E-Mart for the vending machine to be refilled with the grape soda. They begin to wonder where Super Porp comes from when Marcy says shes been drinking it since she was a little girl. Should they chase down the answer or just enjoy the soda. The refill-bots fly off and go under ground, to Susan Strongs homeland. Where suddenly a crime takes place. Susan will discover the truth!

Jake's son T.V. discovers a mysterious diary in the dried-up moat of the Candy Kingdom, and becomes obsessed with finding out more about the writer known only as “B.P.”

The Ice King struggles with the consequences of making new friends.

Jake meets his brother Jermaine in a dream and decides to visit in the real world.

Cuber returns for the telling of another installment of the Graybles.

The cosmic owl falls in love.

Finn and Jake enjoy a day at the water park.

Finn and Jake storm Magic Man's house to rescue his new apprentice who turns out to be Betty. Betty and Magic Man create a system that will make Magic Man the new King of Mars. He has a vision about his dead wife who he magically cloned but instead was supposed to be used as a weapon to stop a space demon. Betty has a vision of how to save Simon and absorbs Magic Man's powers leaving him normal.

While Ice King is sleeping, Gunther throws a party.

Finn's father, Martin the Human, fights for freedom on a new planet.

Finn, Jake, and friends contend with some deadly weather.

Marceline and Bubblegum rekindle an old friendship while fighting off some varmints.

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

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

BMO and Football decide upon a deal, but one of them cannot keep up their end of the bargain.

Marceline looks back on her life on her last day.

Old foes surface from Marceline's past.

An old adversary targets the Ice Kingdom and Marceline has to save Simon.

Princess Bubblegum searches for a cure for Marceline and Finn and Jake battle a vamp.

Marceline's archenemy visits and makes an odd proposal right before battle.

The final confrontation begins.

It's BMO's birthday, and he gets to have his creator MO pay him a visit. Mo gives BMO a solo quest to go the factory and back.

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

Angel Face: BMO ropes his friends into a live action cowboy role-playing adventure! / President Porpoise Is Missing: Finn and Jake must find President Porpoise before Vice President Blowfish takes over! It's chaos under the sea!

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

Finn, Jake, LSP and BMO seek shelter as they contend with some deadly weather.

A King's Ransom: Ice King suffers a heartbreaking loss and it's up to Finn and Jake to find the culprit. / Scamps: Finn takes a group of at-risk Candy Kingdom youth on a camping trip they'll never forget.

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

Finn has secret meetings with a powerful wizard.

Finn and Jake infiltrate the Banana Guard ranks and stumble upon a conspiracy.

At the library, Finn learns of a mountain with treasure possessing transformative properties at its peak. He and Jake venture to find the treasure, but find more than they expected when they encounter the hermit guarding the treasure.

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.

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

When Finn starts having nightmares about his missing Finn sword, he wonders if they are actually real.

Finn brings a special delivery for Cinnamon Bun to the Fire Kingdom but it may come with a dangerous cost.

Normal Man asks for Finn and Jake's help to rescue his brother.

Ice King digs up an item buried underneath the Ice Kingdom.

Fionna and Cake go on a cooking adventure to push Cake's art to an all-new level.

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

Jake and his daughter Charlie fight to restore Jake's honor and win a super-secret underground Card Wars tourney.

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

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

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

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

Princess Bubblegum's scientific mind must wrestle with her Elemental magic potential when she's faced with a Crystal Entity.

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

Finn, Jake, and Susan set sail on a ocean voyage full of wonders and danger.

After waking up alone and shipwrecked, Finn investigates a bizarre island in search of his friends.

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

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

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.

Finn confronts the power behind Founders Island, but will he ever return home to Ooo?

While returning home from their adventure in Islands, Finn, Jake and BMO take a nap after eating a lot of bananas. A mysterious black orb in the sky begins to subject the three to strange dreams that quickly become nightmarish. Their nightmares begin to intertwine as they realize that they are dreaming and come in contact with a being that Finn dubs Nightmare Princess. This entity simply wants their bananas, but BMO strikes a bargain so that they get something in return. The group wake up to the orb taking some of their bananas and leaves a pink vile of nightmare juice. BMO looks through the telescope to discover that Ooo has changed radically.

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.

Ice King explains what happened to Ooo while Finn and Jake were away. After the group left on their adventure, Ice King was visited by Betty (voiced by Felicia Day) who, frustrated over Ice King not remembering her, asks him out on a date. Betty recreates a restaurant from Ice King's previous life as Simon. When Ice King still can't remember his old life Betty drops him off back home and leaves him. Tiny Manticore gives Betty some advice; rather than trying to adhere to Simon, she should just reach out to him as Ice King due to her having changed as well. Betty returns to Ice King and they start playing together. Suddenly, Patience St. Pim (voiced by Lauren Lapkus) kidnaps Betty and begins using her magic to empower mind controlled Princess Bubblegum, Flame Princess and Slime Princess while Ice King flees with Gunter.

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.

In order to calm Finn down, Jake tucks him and himself into a cloud, but it floats away from Ice King and Betty. The two find themselves floating in the middle of endless sky while another cloud with a door flies past them. The two play pretend barber to pass the time and end up getting to the roots of their worries. The cloud flies past again and discover that it is actually a lard. They use the lard to fly back to Betty and Ice King where the former has discovered a way to return the land of Ooo to normal.

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.

Finn, Lumpy Space Princess, and Gunter arrive in a radically altered Fire Kingdom. The inhabitants, which include Wyatt (voiced by Andrew Daly) and Lady Rainicorn, attack the heroes. Finn and Gunter try desperately to restrain their violent tendencies as it would allow the kingdom to corrupt them. Eventually the group find Flame Princess who has transformed into a dragon. When she swallows the jewel necessary to save Ooo, Finn gives into his violence and begins attacking Flame Princess. Lumpy Space Princess angered by the violence yells at everyone to stop their fighting. The kingdom misinterprets her anger and decide to start a war with the Candy Kingdom. Cinnamon Bun, who was unaffected by the corruption, frets that this is the end of Ooo.

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.

Betty knocks out Ice King and reveals that she wants to use the jewels to go back in time and stop Simon from transforming into Ice King. Ice King, still oblivious to her plans accidentally ruins her spell causing her to get transported to Mars where she meets Normal Man. Lumpy Space Princess rescues Finn from the candy inhabitants as Princess Bubblegum enacts her plan to convert the rest of Ooo into candy while Patience freezes herself again. Finn realizes that LSP's immunity means that she is the anti-elemental. Ice King arrives with the gems and Lumpy Space Princess is able to transform all of Ooo back to normal. However, Jake comes back resembling his shapeshifter parent. Despite this, Finn is glad that he is reunited with his brother.

Finn, BMO and Lady Rainicorn are slightly disturbed by Jake's new alien appearance while Jake himself seems oblivious, or rather in denial about it. After having a bizarre dream about Jermaine (voiced by Tom Scharpling) painting abstract art, which according to Jake he hates, he decides to go look for him. Jake traverses the wasteland until he comes across Jermaine's studio. He tries to “rescue” Jermaine from changing, but Jermaine convinces Jake that change is a good thing as long as you remain the same on the inside. After examining and taking home one of Jermaine's paintings, Jake discovers that he has returned to normal and is greeted by a very pleased Finn.

Marceline is unexpectedly visited by BMO causing the former to ask BMO to download a USB drive. While they wait, BMO tells the story of when it, Finn and Jake traveled the seas. However, the story is mostly inaccurate and involves a cat named Ted and a blue jay that says “OOOOOOHH!” (voiced by J. G. Quintel). Marcy then tells the story of “Lollipop Girl” and “Rock Star Girl” and their encounter with a “Blue Tranch” that resulted in “Weekend Island” getting taken over by potatoes. When the USB drive finally downloads, it reveals pictures of young Marcy with her mother. She feigns knowing them and asks BMO to tell their story resulting in a tale about “the Child and the Moon Girl” which Marcy thanks BMO for.

At a Fionna and Cake book reading by Ice King, an old woman claiming to be Fionna (voiced by Charlotte Newhouse) arrives with a tape of an early Fionna and Cake adventure. Ice King is enamored by “Fionna” and invites her to stay with him. At night Ice King watches the remainder of the tape where Fionna and Cake find a mummy (voiced by Chelsea Peretti) only to learn that the mummy is really the Queen of Ooo. Ice King misinterprets the video and thinks that “Fionna” is a mummy. He confronts her and discovers that she was looking for more Fionna and Cake tapes only to find that Ice King doesn't have any. “Fionna” is really a bunny who picked up signals that played Fionna and Cake and wanted more. When she realizes what she has done she flees. Later that night, Fionna and Cake adventures are beamed into Ice King's head.

While fishing, Finn and Fern encounter Sweet P who was running away from home after having a nightmare. Sweet P reveals that he has been having visions of a “whisper monster” trying to tell him he is evil. Finn and Fern decide to camp with Sweet P when they encounter the hand of the Lich that was cut off in “Crossover”. Finn and Fern fight the Lich's hand, but it escapes. Finn gives chase and follows it into an underground tunnel where he ends up getting rescued by Sweet P (he had knocked out Fern so he could escape) who slays the hand. Fern feeling useless for not being able to help, plots to become the true Finn.

Still feeling guilty over Fern's death, Princess Bubblegum tasks Finn to protect the banana guard from a monster later dubbed “the Grumbo”. Finn can't bring himself to slay the monster as he keeps seeing Fern's face materialize when he's close to defeating it. Later, Finn meets up with Huntress Wizard (voiced by Jenny Slate) who is also trying to slay the Grumbo and she tries to give encouraging words to Finn. They find the Grumbo's cave and Finn once again stalls. Huntress Wizard puts herself in harm's way and Finn imagines Fern in her place and finally slays the Grumbo. Afterwards, Finn and Huntress Wizard casually admit their feelings for each other and realize that the Grumbo was artificially created. Uncle Gumbald plots to create another monster using the remains of Fern.

BMO and Ice King become door-to-door salesmen by posing as one body (Ice King as the body and BMO as the head). After selling a stick to Tree Trunks, the two get lost and end up at the dungeon where Gumbald is staying. They sell him Finn's baby teeth which he happily pays for with a silver cup. Finn is outraged that his baby teeth were sold and is further mortified when Baby Finns made of teeth begin attacking the tree house. Through Ice King's encouragement, BMO “sells” two mallets to Finn and Jake and they successfully defeat the teeth babies. Afterwards, Gumbald admits that his current plan was a bad idea.

While at a party, Flame Princess accidentally signs a contract from Toronto stating that if she loses in a rap battle against Son of Rap Bear (voiced by Dumbfoundead) her kingdom will be forfeited to Toronto. She and Finn go meet Rap Bear (voiced by Rekstizzy) who explains that his son literally blew his legs off, frightening them. Despite training, Flame Princess still feels ill-prepared, and so she visits her father, the deposed Flame King (voiced by Keith David). She attempts to mend their rocky relationship, but much to her frustration, her father seems oblivious to the pain that he caused his daughter. Later, at the rap battle, Flame Princess begins to lose her composure, but after seeing the still-unapologetic Flame King in the crowd, she angrily expresses her frustrations with her father in a rap. The track impresses the crowd, and Flame Princess defeats Son of Rap Bear.

When Finn presents the silver cup from “Always BMO Closing”, Princess Bubblegum decides to tell him, Marceline and Jake some more of her history. 800 years ago, a child version of Bonnibel discovers a family photo and decides to create a gum family. She creates Uncle Gumbald, Aunt Lolly and Cousin Chicle to help farm the area. However, her family quickly turn on her with the prospect of “branding” their family. Gumbald creates a juice that transforms those into low minded candy people. Bonnibel fights back, transforming them into her eventual candy civilians and deciding on the title of princess. In the present, BMO reveals where it got the cup.

At Finn's seventeenth birthday party, held at the Candy Kingdom, Princess Bubblegum, Marceline, Huntress Wizard and BMO present Finn with gifts. Suddenly, the Green Knight (voiced by Brad Neely) arrives and presents Finn with his own gift, an ax that he will reward him with if he attacks him with it. Thinking this is one of Jake's tricks, Finn beheads the Green Knight only for Jake to arrive and the Knight challenges him to a battle by blocking him from his friends. Finn accepts and the two play 2/3 with the party games held at the castle. While arm wrestling, the Knight reveals himself to be a revived Fern who makes short work of Finn. He is stopped by Gumbald, Lolly and Chicle who were returned to their original form by Lumpy Space Princess transforming Ooo at the end of Elements. The trio and Fern leave as Finn is devastated by his loss.

Tree Trunks gets a call from her old flame Randy (voiced by David Herman) who wants his old ring back to propose to his new girlfriend. In flashback, Randy proposed to Tree Trunks after graduating high school. Immediately afterwards, Tree Trunks left him and became a pirate on the sea where she met and married Danny (voiced by Raza Jaffrey). She breaks up with him due to him lying to her and she moves on to becoming a CEO to a shipping company. She marries her employee Wyatt, but due to his clinging attitude breaks up with him and he flees with the ring. Mr. Pig, who followed arrives as does Wyatt who still has the ring. Randy gets it back and Tree Trunks and Mr. Pig reaffirm their love.

Peppermint Butler gives Finn a new sword, the Night Blade. However, he also summons Hunson Abadeer. Peppermint Butler allows Hunson to roam the earth for one day and is restrained from using his powers. Finn and Jake take him to Marceline who is once again annoyed at her father's ignorance. When Finn and Jake let slip that Marceline has a solo concert for ghosts, Hunson forces his way in. Marceline gives her performance, but it is interrupted by Hunson's interference. Chicle, who has been following them, instigates a ruckus with the ghosts who proceed to beat up a weakened Hunson. Marceline is also powerless from stopping them, but Finn's new sword saves them. The group escape and meet with Princess Bubblegum and Marceline and Hunson make up.

Kim Kil Whan sends Finn and Jake to Joshua and Margaret's old office after one of his employees get frightened by something. Finn and Jake witness strange ghosts and other sightings as objects move around. Finn suddenly sees baby versions of himself, Jake and Jermaine and gives Jake a wet willy (earlier Jake claimed that Finn had given him one years ago and he denied it). Realizing that the ghosts are time remnants, Finn tries to look for the source while Jake accidentally scares Kim's employee and sees his own birth from “Joshua and Margaret Investigations”. They discover that one of Dr. Gross' experiments, Time Bear, had been behind it and fix him with Finn leaving a note for past Joshua and Margaret. While outside, Jake meets his alien parent, is turned blue and taken away leaving a note for Finn that reads “BRB-Jake”.

Bummed about Jake being gone, Finn reads an issue of Ble Magazine and comes across a doodle of a caveman with his leg getting bit by a dog while a psychiatrist sits next to him. Finn writes “Ouch! Hey this isn't helping at all!”. He shows it to BMO and Princess Bubblegum, but neither get it. Finn shows it to Ice King who reveals that he wrote to Ble Magazine to have his stories published, but they never were.

Immediately after “The First Investigation”, Jake is taken by his dying alien parent, Warren Ampersand, to his home planet and discovers he that must defeat an evil alien to save the inhabitants. Warren gives Jake a special belt while he wears one himself. As Jake uses his stretching powers, he becomes weaker and Warren becomes younger, revealing that the belts drain Jake's youth and energy.

Finn is visited by Jermaine who reveals that Jake is in space and that they must rescue him. They head to Mars where Normal Man, now King Man, has Betty doing labor to “cure” her. King Man has them enter a cave to search for a device to save Jake and encounter various puzzles.

Finn is visited by Jermaine who reveals that Jake is in space and that they must rescue him. They head to Mars where Normal Man, now King Man, has Betty doing labor to “cure” her. King Man has them enter a cave to search for a device to save Jake and encounter various puzzles. Eventually, they come across Past Betty who was to go on a trip in a week, but met Simon changing her plans. Finn and Jermaine tell her that Betty needs to think about herself and she “changes” her past so that she left that day instead of in a week.

In the distant future, many years after the outcome of the Gum War, two friends named Beth and Shermy recover a rusty old mechanical arm that once belonged to Finn after it is dropped by a Prize Ball Guardian. In their home, formerly known as the residence of Marceline the Vampire Queen, the two decide to visit the “King of Ooo” in order to inquire about its origins. They visit the King in his hideout at the top of Mount Cragdor, and are greeted by BMO and his many artifacts and keepsakes of old. After Shermy and Beth accidentally break a few items, BMO asks them to leave. When they present him with Finn's lost mechanical arm, however, BMO agrees to tell them the story of the Gum War.