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 THEIVING 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 it'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. 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 What am I to you? The door, in response, opens to the Door Lord eating a sandwhich in an empty room. The crew translates him saying that he stole the items to show them that the real treasure was their friendships. They seem to understand and the Door Lord smiles, but then the scene fades to a bruised, tied up, beaten Door Lord. They start to gather their stolen items. A black tee shirt with skulls is mistaken to be Marceline's, but is claimed by Princess Bubblegum; claiming she wears it all the time as pajamas  (thus reconciling her and marceline's friendship, being as it was a gift from marceline). 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
 * Candy Person #36

Songs

 * I'm Just Your Problem
 * A Song About Noodles
 * Bubblegum's Blueprint Song
 * What am I to you?

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.
 * At the end of the episode the candy kid's toy train was not returned to him as Finn promised.
 * At the end when PB is seen running out with a magenta shirt not a black shirt.