BMO discovers that something went wrong in the factory where all the MOs were created.
After Susan Strong's chip is activated, she goes rogue and attacks Finn.
Children's animation. Ice King discovers something buried deep beneath the Ice Kingdom.
Princess Bubblegum creates a friend for Cinnamon Bun to keep him company.
Jake needs his daughter's help in an underground Card Wars tournament.
Finn and Jake enjoy a day at the water park.
Children's animation. Finn and Jake are led down a whirlpool to a curious new land.
Finn and Jake infiltrate the Banana Guard ranks and stumble upon a conspiracy.
Finn has been secretly meeting a powerful wizard.
Trapped and alone, Finn must unravel the riddle of the weird cave with no exit.
BMO ropes Jake into playing the part of his trusty steed in a cowboy role-playing game.
The Ice King enlists Finn and Jake to recover his stolen crown and Gunter the penguin.
Marceline and the gang face the vampiric essence of the Vampire King.
As Princess Bubblegum tries to cure Marceline, Finn and Jake track down another vampire.
When an old adversary targets the Ice Kingdom, Marceline must protect the Ice King.
As the sun rises on Marceline's last moments, her life flashes before her eyes.
While chasing a flying mushroom, Finn and Jake bump into Canyon on a mission of her own.