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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 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 .. show full overview
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 its 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.
Finn and Jake must go on a quest to find the Lich King (originally sealed away by Billy), while the Ice King pesters them for permission to date Princess Bubblegum.
The Princess isn't feeling well and Jake starts to worry something might be wrong with her.. The Ice King is anxious to help, but does Finn trust him?
Marceline plays a prank on Finn and Jake by making them believe they're vampires, but it nearly goes too far when they're manipulated by her ghost friends.
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