Episodes: Series - Adventure Time with Finn & Jake S3 - 2011

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Finn and Jake are having a hard time dealing with a species of super-evil creatures, who are far too adorable to be treated seriously.

Finn and Jake find themselves trapped in a spooky arena, where they must battle ghost gladiators in order to break free.

A mystery visitor finds Finn and Jake's pal, Marceline the Vampire Queen, in a deep sleep and assists them to wake her up by sending them into her dreams.

The Ice King's plan to scare Finn and Jake backfires, as he sends a professional bully to beat them up, but ends up accidentally hiring a ruthless hitman.

Princess Bubblegum has reverted to Finn's age, which makes Finn delighted. However, someone appears shortly after to dethrone the newly crowned princess.

The Lumpy Space Princess has been mistaken as a monster while living in the woods. On the other hand, the king and queen of Lumpy Space enlist Finn's help to bring her back.

Finn and Jake end up being the reluctant closest pals of the lonely villain, after they are paralyzed by the Ice King's elixir.

The Ice King fights wizards from all across the Land of Ooo in order to win a kiss from Princess Bubblegum, which Finn and Jake try to stop.

Fionna, an explorer, seeks advice from her cat-friend Cake on her date with Prince Gumball in a universe where all the characters have different genders.

Finn and his buddies must create a band in order to open a magical portal containing stolen goods. However, the diversity in musical interests within the group and the resulting conflicts complicate things.

Finn and Jake search the Candy Kingdom's criminal underground for Tree Trunks' lost apples once she learns that they got stolen.

Finn's custom birthday party ends up being a perilous mystery.

The Candy Kingdom is once again plagued by the zombie epidemic.

Susan Strong reappears, begging Finn and Jake to help her people escape the Glubs. Finn, on the other hand, is still uncertain if he can trust her after the previous incident.

Finn wakes up in a hospital room after attempting to stop a deer from licking the Candy Kingdom residents. Everyone is absent except Jake, who is behaving oddly.

Jake is blackmailed into killing Wildberry Princess by a little cat assassin who hides in his nose.

Lost in the frigid woods, a fire-breathing wolf pup makes an unexpected friendship with the Snow Golem.

Jake has a dream that appears to predict his death, but he ignores it, much to Finn's surprise.

After Finn and Jake find Ice King's video diaries, they try to find out his hidden secrets.

As the Ice King attempts to retrieve his video diaries, Finn and Jake find out surprising information about his identity.

Finn and Jake get bored while waiting for Marceline and they slip into her house, however they get stuck. But when she returns home, they witness her weird behavior whenever she is alone.

Finn gets thrown into the heart of a hidden fight between small paper people and moldy monsters in the library.

Finn sets off in search of a cyclops' magical tears to heal his injuries, but he runs into problems due to his refusal to listen to others' advice.

Finn and Jake are attempting to assist Ghost Princess in investigating her murder.

After Finn and Jake find a long-lost note from their father, they are led to a strange and hazardous dungeon.

Jake sets out to locate a new princess for Finn to date in order to help Finn get over his doomed emotions for Princess Bubblegum.