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?

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.

The world expands: the characters' personalities are deepened and key figures like the Ice King and Marceline are introduced.

The balance between comedy and introspection becomes firmer. The first clues emerge about Ooo's post-apocalyptic past and the mysterious "Mushroom War."

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.

The longest season explores alternate realities and multiple identities.

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.

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.