Episode 1
The greed of the King of Ooo leads to a crisis in the Candy Kingdom, and (ex-) Princess Bubblegum has to return briefly from exile to deal with it.
Episode 2
Bubblegum turns to Marceline's help when something threatens the citizens of her homestead.
Episode 3
The arrival of a visitor causes Cherry Cream Soda's life to fall flat.
Episode 4
The loyalty of Finn and Jake comes into question when the King of Ooo orders them to intercept a flying mushroom.
Episode 5
BMO and Football decide upon a deal, but one of them cannot keep up their end of the bargain.
Episode 6
Finn and Jake hunt a shadowy predator and Marceline asks Princess Bubblegum for a favor.
Episode 7
As the sun rises on her last day, Marceline recalls her long extraordinary life.
Episode 8
Five foes from Marceline's past come back to cause trouble for the Land of Ooo.
Episode 9
When one of her oldest adversaries targets the Ice Kingdom, Marceline rushes to Simon's rescue.
Episode 10
Finn, Jake, Marceline, and PB set out to hunt down the Vamps. But who is hunting them?
Episode 11
While Princess Bubblegum searches for a cure for Marceline, Finn and Jake take on one of the Vamps themselves.
Episode 12
On the eve of battle, Marceline's archenemy comes to her with a strange proposal.
Episode 13
The final confrontation begins. Who will survive?
Episode 14
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.
Episode 15
BMO continues its quest to adulthood. It'll discover that something went wrong in the factory where all the MOs where created.
Episode 16
Viola tries to get a part in LSP's play, but gets made into LSP's personal assistant instead.
Episode 17
BMO convinces his friends to join him in a live action cowboy role-playing game.
Episode 18
Finn and Jake attempt to track down President Porpoise before Vice President Blowfish takes over.
Episode 19
One very spooky night, Finn and Jake come face-to-face with an urban myth.
Episode 20
Finn, Jake, LSP and BMO seek shelter as they contend with some deadly weather.
Episode 21
Ice King suffers a heartbreaking loss and it's up to Finn and Jake to find the culprit.
Episode 22
Finn takes a group of at-risk Candy Kingdom youth on a camping trip they’ll never forget.
Episode 23
Finn and Jake crossover into Farmworld Finn's dimension.
Episode 24
Trapped and alone, Finn must unravel the riddle of the weird cave with no exit.
Episode 25
Finn has secret meetings with a powerful wizard.
Episode 26
Finn and Jake infiltrate the Banana Guard ranks and stumble upon a conspiracy.
