Twelve- year-old Finn battles evil in the Land of Ooo. Assisted by his magical dog, Jake, Finn roams the Land of Ooo righting wrongs and battling evil. Usually that evil comes in the form of the Ice King, who is in search of a wife. He's decided he should wed Princess Bubblegum, though she doesn't want to marry him. Still, he persists in trying to steal her away, and Finn and Jake, along with Lady Raincorn (a cross between a unicorn and a rainbow) do their best to keep her from harm.
Finn and Jake, acting on orders from Candy Kingdom's new ruler Princess King of Ooo, stumble upon one of the kingdom's greatest secrets.
Bubblegum teams up with Marceline to face a threat to her homestead's citizens.
With the arrival of an impossible visitor, Cherry Cream Soda's life is thrown into disarray.
When King of Ooo sends Finn and Jake on a mission to catch flying mushrooms, they find their loyalty tested.
Football and BMO strike a bargain that may prove too difficult for one of them to keep.
Finn and Jake hunt for a shadowy predator and Marceline asks Princess Bubblegum for a huge favor.
As Marceline is tied up and about to be doused in the light of the rising sun, she goes through several flashbacks to past memories in her extraordinary life.
Five foes from Marceline's past come back to cause trouble for the Land of Ooo.
When one of her oldest adversaries targets the Ice Kingdom, Marceline rushes to Simon's rescue.
Finn, Jake, Marceline and Princess Bubblegum set out to hunt down the Vamps. But who is hunting them?
While Princess Bubblegum searches for a cure for Marceline, Finn and Jake take on one of the Vampires themselves. Peppermint Butler saves the day and kills the Moon Vampire.
On the eve of the battle, Marceline’s archenemy, the Vampire King, comes to her with a strange proposal.
After the release of the Vampire King's Vampuric essence, Finn, Jake and Princess Bubblegum are forced into a fight against the unstoppable force without the aid of Marceline.
On BMO's birthday, Moe comes to visit and give BMO a special birthday mission. But Moe begins to overstay his welcome at the tree house.
Jake's daughter Viola is up for a role in a play by a hot new director—Lumpy Space Princess.
BMO ropes his friends into a live action cowboy role-playing adventure!
Finn and Jake must find President Porpoise before Vice President Blowfish takes over! It's chaos under the sea!
One very spooky night, Finn and Jake come face-to-face with an urban myth.
There's a catastrophic storm headed for the Grasslands, so Finn, Lumpy Space Princess, and Beemo decide to build a bunker for protection, but Jake has plans of his own.
Ice King suffers a heart-breaking loss and it's up to Finn and Jake to find the culprit.
Finn takes a group of at-risk Candy Kingdom youth on a camping trip they’ll never forget.
Prismo needs Finn and Jake’s help to stop a catastrophic event from happening somewhere in the multiverse.
Trapped and alone, Finn must unravel the riddle of the weird cave with no exit.
Jake learns that Finn’s been having clandestine meetings with a powerful wizard. But what are they up to?
Finn and Jake infiltrate the Banana Guard ranks and stumble upon a conspiracy.