26 episodesFirst aired 2 November 2015
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.
E1Nov 201511m
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.
E2Nov 201511m
Bubblegum turns to Marceline's help when something threatens the citizens of her homestead.
E3Nov 201511m
The arrival of a visitor causes Cherry Cream Soda's life to fall flat.
E4Nov 201511m
The loyalty of Finn and Jake comes into question when the King of Ooo orders them to intercept a flying mushroom.
E5Nov 201511m
BMO and Football decide upon a deal, but one of them cannot keep up their end of the bargain.
E6Nov 201511m
Finn and Jake hunt a shadowy predator and Marceline asks Princess Bubblegum for a favor.
E7Nov 201511m
As the sun rises on her last day, Marceline recalls her long extraordinary life.
E8Nov 201511m
Five foes from Marceline's past come back to cause trouble for the Land of Ooo.
E9Nov 201511m
When one of her oldest adversaries targets the Ice Kingdom, Marceline rushes to Simon's rescue.
E10Nov 201511m
Finn, Jake, Marceline, and PB set out to hunt down the Vamps. But who is hunting them?
E11Nov 201511m
While Princess Bubblegum searches for a cure for Marceline, Finn and Jake take on one of the Vamps themselves.
E12Nov 201511m
On the eve of battle, Marceline's archenemy comes to her with a strange proposal.
E13Nov 201511m
The final confrontation begins. Who will survive?
E14Dec 201511m
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.
E15Dec 201511m
BMO continues its quest to adulthood. It'll discover that something went wrong in the factory where all the MOs where created.
E16Jan 201611m
Viola tries to get a part in LSP's play, but gets made into LSP's personal assistant instead.
E17Jan 201611m
BMO convinces his friends to join him in a live action cowboy role-playing game.
E18Jan 201611m
Finn and Jake attempt to track down President Porpoise before Vice President Blowfish takes over.
E19Jan 201611m
One very spooky night, Finn and Jake come face-to-face with an urban myth.
E20Jan 201611m
Finn, Jake, LSP and BMO seek shelter as they contend with some deadly weather.
E21Jan 201611m
Ice King suffers a heartbreaking loss and it's up to Finn and Jake to find the culprit.
E22Jan 201611m
Finn takes a group of at-risk Candy Kingdom youth on a camping trip they’ll never forget.
E23Jan 201611m
Finn and Jake crossover into Farmworld Finn's dimension.
E24Mar 201611m
Trapped and alone, Finn must unravel the riddle of the weird cave with no exit.
E25Mar 201611m
Finn has secret meetings with a powerful wizard.
E26Mar 201611m
Finn and Jake infiltrate the Banana Guard ranks and stumble upon a conspiracy.
