What Was Missing

"What Was Missing" is the tenth episode of season three of Adventure Time.

Synopsis
Finn and his friends must come together as a genuine band in order to open the gate of the Door Lord and get back their taken items. thumb|right|300px|"What Was Missing" Animaitc

Plot
The scene opens on Finn seeing if no one is home, then pulling the lock of Princess Bubblegum's hair from "To Cut A Woman's Hair" out from under the couch. He sits down and cuddles it, but then Jake comes out from behind the couch with Beemo. Jake then says he knew about his "private time with the wad of P.B.'s hair" all along. Jake picks up a floor board and pulls out his baby blanket to show Finn. Then a door appears and out hops a Door Lord. He then snatches Finn's wad of P.B.'s hair, Beemo's controller, and Jake's blanket. The three follow the Door Lord through the door which leads to P.B.'s castle. P.B. is seen hollering "You thieving Door Lord! You butt!" and then she follows the group through another portal into Marceline's house. The group, now with Marceline and P.B. goes through a final door, and a double door closes in front of them. Finn reads symbols that say: ''This door will open for no command except for a song from a genuine bande. ''The crew then makes some music, but Princess Bubblegum comments "Marceline, that's too distasteful!" Marceline replies "Oh, you don't like that? Or do you just not like me?!" Then she sings I'm Just Your Problem.

She says something that wasn't truthful causing the faces to stop responding to the music. Jake calls P.B. and the others "talentless hacks" and leaves, only to come back again later (this is all part of his act as the band's self-proclaimed jerk). Finn suggests that they have a noodle break and asks about singing a song about noodles but Marceline and P.B. yell at him, "No!" P.B. attempts to make a complicated song, but it doesn't work out and Marceline and P.B. start fighting. They all soon start leaving except for Finn. Finn then says scarcely "no no no no no...". and then begins to sing My Best Friends In The World. The door, in response, opens to the Door Lord eating a sandwich in an empty room. The crew listens to his mumblings, and while Finn appears to be perplexed at them, PB, Marceline, and Jake state that what the Door Lord had hoped for them to learn, that the real treasure was their friendships. The Door Lord smiles with glee at their revelation, but then he is shortly beaten up afterward by the five, presumably in retaliation to his thievery. Jake then passes out their stolen items. Finn receives his wad of Princess Bubblegum's hair, where P.B. replies, "Oh, you." and Finn mutters under his breath "Yeesh." Jake gets his baby blanket and BMO gets its controller back. A black tee shirt with what seems to be cinnamon rolls strangling a snake is mistaken to be Marceline's, but is claimed by Princess Bubblegum; claiming she wears it all the time as pajamas. At the end, it is revealed that Marceline had nothing to be given back and was just hanging out with them. The episode ends with Marceline in a monster form chasing after Finn, Jake, and P.B. exclaiming, "I'll kill you!"

Major Characters

 * Finn
 * Jake
 * Marceline
 * Princess Bubblegum
 * Beemo
 * Door Lord

Minor Characters

 * Shelby
 * Snail
 * Chocolate Malt Ball Kid
 * Cloud Person

Songs

 * I'm Just Your Problem
 * A Song About Noodles
 * Bubblegum's Blueprint Song
 * My Best Friends In The World

Trivia

 * This episode was formerly titled "Door Jam." Adam Muto confirmed that it was the working title. It was a pun on the musical term "jam" and on "door jamb," the name for the vertical part of a door's frame. However the title was changed because the Adventure Time writers prefer not to use puns in episode titles.
 * Finn still has the wad of Princess Bubblegum's hair he got in "To Cut a Woman's Hair."
 * As seen in the preview, the oven, range hood, and cabinets in Marceline's house are white instead of red. Marceline may have sucked the red coloring out of them.
 * The title card was designed by Michelle Xin and painted by Martin Ansolabehere.
 * Shelby is seen crawling out and back into Jake's viola when he smashes it.
 * This is the first time in an Adventure Time episode where Princess Bubblegum sings.
 * When Finn passes the kid who's toy was stolen, he says, I'll get your kid back, toy." instead of, "I'll get your toy back, kid."
 * A scene of Finn returning the candy kid's toy train was not included, presumably because of running time.
 * At the end when PB is seen running away, her shirt is magenta instead of black.
 * At the end of the episode where Marceline is chasing everyone, Beemo is not seen with them. This is more likely a continuity or an animation error.
 * This is the first episode with PB and Beemo interacting.
 * The Door Lord looks similar to Key-per from the episode "The Enchiridion!." Key-per wore a key strapped to his head while the Door Lord wore a door.
 * While PB,Finn and Jake are chasing the Door Lord in Marceline's house, the title card music for "Hitman" is played.
 * In the first scene, there are power lines connected with the Tree Fort.
 * Although nothing was taken from Marceline, it is probably that her most valuable item is her Axe-Bass, as she was holding it before the Door Lord escape.