The season follows the adventures of Finn the Human, a human boy, and his best friend Jake, a dog with magical powers to change shape and grow and shrink at will. Finn and Jake live in the post-apocalyptic Land of Ooo, wherein they interact with the other major characters, including: Princess Bubblegum, the Ice King, Marceline the Vampire Queen, Lumpy Space Princess, and BMO.

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.

Finn and Jake chase the Lich through a dimensional portal where they meet Prismo, who tells them that the Lich wished for the extinction of all life. This leads Finn to wish that the Lich "never even ever existed.

Finn attempts to prove to Jake that Flame Princess isn't evil while trying to win her heart turns into a quest to stop her from taking over the Goblin Kingdom.

A human boy and his adopted brother - a magical dog - set out to become righteous adventurers in the Land of Ooo.

La Segunda temporada de Adventure Time fue debutada el 11 de octubre de 2010 y terminada el 9 de mayo de 2011 en Estados Unidos, en latinoamérica debuto el 11 de septiembre de 2011 y finalizada el 19 de marzo de 2012, esta temporada consistió de 26 segmentos (13 episodios) de 11 minutos de duración.

There's trouble brewing in Bikini Bottom. Someone has stolen King Neptune's crown, and it looks like Mr. Krab, SpongeBob's boss, is the culprit. Though he's just been passed over for the promotion of his dreams, SpongeBob stands by his boss, and along with his best pal Patrick, sets out on a treacherous mission to Shell City to reclaim the crown and save Mr. Krab's life.

Hannah is a recent college graduate interning at a Chicago production company. She is crushing on two writers at work, Matt and Paul, who share an office and keep her entertained. Will a relationship with one of them disrupt the delicate balance of their friendship?