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