Finn, Jake and Princess Bubblegum discover a talented mutant named Lemonhope at The Pageant of Mutants. Now they must find a way to free him from the lemongrabs.
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Slumber Party Panic
Finn and Princess Bubblegum must protect the Candy Kingdom from a horde of candy zombies they accidentally created.
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.
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'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.
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.
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.
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 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.
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!
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 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.
Battling with her new realization of her own mortality, in a sleep deprived state Princess bubblegum creates her own heir to the throne. After meeting the heir, Finn and Jake decide to teach her the ways of the world.
Magic man has most of his power taken from him by his brother, in a fit of desperation, he swaps the way Jake and Himself look.
Magic Mans brother takes Jake to Mars for punishment,
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.
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.
Finn's hat comes to life and becomes evil after it is touched by a wizard. Finn, Jake, and the wizard track the hat down, and manage to turn the hat good.
The princesses tire of Ice King’s crazy Fionna-and-Cake fan-fiction stories, so Marceline stops by the Ice Kingdom to show him how to properly write a story.
When Flame Princess begins to doubt her evilness, Finn insists she is not evil and takes her on a journey into a dungeon to help her sort out her thoughts.
The Ice King creates a computer virus that will delete everyone in Ooo except for him and Princess Bubblegum. Finn and Jake hack into the universal source code to destroy the virus.
Jake Jr. gets involved with a group of troublemakers, and Jake is forced to reunite his old gang—which includes Tiffany who first appeared in the first season episode "My Two Favorite People"—to rescue his daughter.
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.
After Starchy comes down with a cold and needs a magic cure, Finn, Jake, and Princess Bubblegum disguise themselves as wizards and sneak into Wizard City.
Finn, Jake and Princess Bubblegum discover a talented mutant named Lemonhope at The Pageant of Mutants. Now they must find a way to free him from the lemongrabs.
Princess Bubblegum subjects Flame Princess to a series of tests to gauge Flame Princess' fiery tendencies. But when there's an emergency at the treehouse, and Princess Bubblegum leaves Cinnamon Bun to watch Flame Princess, her experiment might literally backfire in her face.
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?
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!
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!
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, Jake and Marceline are trapped in an underground cavern with no red in sight. If Marceline doesn't feed, like ASAP, she will turn into a vampiric beast and suck out all of Jake's blood! So, Finn heads off to explore the cave and find something red to satiate her until they can be rescued. But time is running out!
Finn finds an old truck, and Jake calls Banana Man to help with the repairs. But when BMO stays up all night working on the truck, he hears on a spooky radio talk show that Princess Bubblegum is a reptilian replicant. Is it just another one of Starchy's crazy conspiracy theories, or a fact?
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.
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...
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.
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.
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?
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.
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.
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?
On BMO's birthday, Moe comes to visit and give BMO a special birthday mission. But while BMO is away, Moe begins to overstay his welcome at the tree house.
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.
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.
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.
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.
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