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.
Bonnie and NeddyThe 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.
Varmints
A2
VarmintsBubblegum turns to Marceline's help when something threatens the citizens of her homestead.
Cherry Cream Soda
A3
Cherry Cream SodaWanneer een onmogelijke bezoeker arriveert, wordt Kersensaps levens overhoop gehaald.
Mama Said
A4
Mama SaidWanneer de Koning van Ooo Finn en Jake op pad stuurt op levende paddenstoelen te vangen, wordt hun trouw op de proef gesteld.
Football
A5
FootballBMO and Football decide upon a deal, but one of them cannot keep up their end of the bargain.
Stakes: Marceline the Vampire Queen (1)
A6
Stakes: Marceline the Vampire Queen (1)Finn and Jake hunt a shadowy predator and Marceline asks Princess Bubblegum for a favor.
Stakes: Everything Stays
A7
Stakes: Everything StaysWanneer haar laatste dag aanbreekt, kijkt Marcelien terug op haar buitengewone leven.
Stakes: Vamps About (3)
A8
Stakes: Vamps About (3)Five foes from Marceline's past come back to cause trouble for the Land of Ooo.
Stakes: The Empress Eyes (4)
A9
Stakes: The Empress Eyes (4)When one of her oldest adversaries targets the Ice Kingdom, Marceline rushes to Simon's rescue.
Stakes: May I Come In? (5)
A10
Stakes: May I Come In? (5)Finn, Jake, Marceline, and PB set out to hunt down the Vamps. But who is hunting them?
Stakes: Take Her Back
A11
Stakes: Take Her BackTerwijl Prinses Bubbelien een geneesmiddel zoekt voor Marceline binden Finn en Jake zelf de strijd aan met een van de Vampiers.
Stakes: Checkmate (7)
A12
Stakes: Checkmate (7)On the eve of battle, Marceline's archenemy comes to her with a strange proposal.
Stakes: The Dark Cloud (8)
A13
Stakes: The Dark Cloud (8)Following the release of the Vampire King's Vampuric essence, Finn, Jake, and Princess Bubblegum are forced into a fight against the seemingly unstoppable force without the aid of a depressed Marceline.
The More You Moe, The Moe You Know (1)
A14
The More You Moe, The Moe You Know (1)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 More You Moe, The Moe You Know (2)
A15
The More You Moe, The Moe You Know (2)BMO continues its quest to adulthood. It'll discover that something went wrong in the factory where all the MOs where created.
Summer Showers
A16
Summer ShowersViola tries to get a part in LSP's play, but gets made into LSP's personal assistant instead.
Angel Face
A17
Angel FaceBMO convinces his friends to join him in a live action cowboy role-playing game.
President Porpoise Is Missing!
A18
President Porpoise Is Missing!Finn and Jake attempt to track down President Porpoise before Vice President Blowfish takes over.
Blank Eyed Girl
A19
Blank Eyed GirlOne very spooky night, Finn and Jake come face-to-face with an urban myth.
Bad Jubies
A20
Bad JubiesFinn, Jake, LSP and BMO seek shelter as they contend with some deadly weather.
King's Ransom
A21
King's RansomIce King suffers a heartbreaking loss and it's up to Finn and Jake to find the culprit.
Scamps
A22
ScampsFinn takes a group of at-risk Candy Kingdom youth on a camping trip they’ll never forget.
Crossover
A23
CrossoverFinn and Jake crossover into Farmworld Finn's dimension.
The Hall of Egress
A24
The Hall of EgressTrapped and alone, Finn must unravel the riddle of the weird cave with no exit.
Flute Spell
A25
Flute SpellFinn has secret meetings with a powerful wizard.
The Thin Yellow Line
A26
The Thin Yellow LineFinn and Jake infiltrate the Banana Guard ranks and stumble upon a conspiracy.
