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

Finn and Jake try to rid themselves of a weird horse that creeps them out.

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.

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.

Jake is sick and demands to hear a good story full of romance, fighting and suspense.

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

Finn is captured by gnomes who want to use his energy to power their infernal machines, and it's up to Jake to stay focused and rescue him.

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

Finn choses to cross the Desert of Doom to deliver the royal tarts to the annual back rubbing ceremony.

A tree witch demands a lock of princess hair or else Jake will be sucked into her bottomless bottom.

Whilst the Ice King goes out to take Gunther to the hospital, Finn and Jake decide to sneak inside his lair and flex their ninja skills.

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. However, thanks to Jake's shape-shifting powers, they mistake the dog as one of their own, but for how long?

Finn and Jake discover a box containing three beans. Planting them causes three pods to grow. Two of them are good and one is evil, but which is which?

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

Finn and Jake get sucked into one of BMO's games and they have to defeat all three of his bosses.

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 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.

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

Marceline and Jake give Finn advice so he can ask Princess Bubblegum to see a movie with him.

In order to cure the stomach ache of a giant, Finn and Jake must break up a party happening in his belly.

On a mission to save soldiers of the Hot Dog Princess, Finn and Jake go inside a massive maze where wishes can be granted and where Jake's stretching powers are pushed to their limits.

After discovering government warnings prior to movies for their film club, Finn and Jake decide to make their own, but get into a fight over the direction of their film.

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.

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.

Marceline plays a prank on Finn and Jake by making them believe they're vampires, but it goes too far and escalates when they're manipulated by her ghost friends.

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

The duo choose to partake in gladiatorial combat against the Fight King's ghost warriors, but Finn succumbs to bloodlust while Jake becomes obsessed in keeping a cool morale.

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.

The grounded Ice King hires a fire-manipulating hitman to attack Finn and Jake, without realizing the potentially deadly consequences.

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.

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.

Finn and Jake are literally unable to move and are at the mercy of the Ice King.

Finn and Jake enter a competition for wizards in disguise so they can prevent Ice King from winning the grand prize: a kiss from Princess Bubblegum.

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

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.

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.

Finn and Jake receive an invitation to a masquerade dinner. It turns into a whodunit as guests start to meet their demise.

When another plague of Candy Zombies arises and Princess Bubblegum is among the undead, Finn and his friends are in a race against time to figure out how to stop it...without making things even worse!

Susan Strong asks Finn and Jake to help fight off the Glub Glubs in the sewers below to regain her people's home in Beautopia.

Finn awakens after an accident to find the Candy Kingdom citizens mysteriously gone and Jake acting crazier than usual.

Finn and Jake take on a request to protect Wildberry Princess from an unknown assassin. The assassin turns out to be a tiny cat assassin called Me-Mow, who ends up bribing Jake by poisoning him.

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

Jake dreams about his death, and Finn takes action when events from the dream start to come true.

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

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

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

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

Finn and Jake play detective and try to solve Ghost Princess' murder.

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.

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

During the journey home from their sea-faring adventure; Finn, Jake, and BMO encounter a mysterious force that enters their dreams.

Finn, Jake, and BMO return from their voyage to a radically changed Ooo.

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.

Finn, Jake and Ice King break into the Ice World to confront the power-hungry evildoer responsible for the chaos in Ooo and try to rescue Betty.

After taking a nap, Finn and Jake get separated from Betty and the Ice King. They need to get back and Jake needs to go pee.

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.

After gathering the Slime jewel, Finn and LSP go to the Fire Kingdom, to gather the Flame Jewel. Everything has turned even hotter than before.

After going to the Fire Kingdom, Finn becomes taken over by fire. LSP has to save him before he destroys the candy kingdom.

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.

Jake struggles through the personal changes happening to him as a mysterious encounter in a dream with his brother Jermaine begins to haunt him.

BMO and Marceline play catch up on recent events.

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

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

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