|"Trouble in Lumpy Space"|
| Season 1, Episode 2|
|Airdate:||April 5, 2010|
|Story:|| Merriwether Williams|
|Written & Storyboarded by:|| Adam Muto|
"Slumber Party Panic"
"Prisoners of Love"
Finn, Jake, Princess Bubblegum, Lumpy Space Princess, and Hot Dog Princess are participating in a Mallow Tea Ceremony. Princess Bubblegum says it takes years to master, for Finn and Jake cannot master it, and Lumpy Space Princess says it easy, since she is floating and not bouncing. She turns off her floating powers and during a bad fall, she accidentally bites Jake. Soon Jake's bite mark turns into a bump, but LSP tells them that it is the early stage of The Lumps: a disease that happens whenever a Lumpy Space person bites a smooth person(Similar to werewolf-like curses). The Lumps begin to transform a smooth person into a Lumpy Space Person and if the victim is not cured by sunset, that person will be lumpy forever. Jake's right arm and leg have already gotten lumpy, so LSP takes Finn and Jake to Lumpy Space to find an antidote. LSP tells them that the antidote is at Makeout Point, but they hit a roadstop where LSP also says that they have to use a car to travel. LSP tries using her parents' car, but they ban her from it after she argues with them (Her father hates smooth people in Lumpy Space). So LSP calls her friend Melissa who tells her that tonight is the weekly promcoming dance, and soon LSP spazzes out as she had forgotten. So Finn takes her phone and impersonates Lumpy Space Princess to have Melissa to drive them to Makeout Point. Jake's lumpiness worsens, to the point where he starts acting like a Lumpy space person. Melissa drives them to Makeout Point (first stopping at her boyfriend's (and also LSP's ex-boyfriend) Brad's house). Soon they meet a trio of Lumpy Space people (Monty, Lenny, and Glasses) who hate being lumpy and use a sphere to make themselves look smooth. They were about to hand the antidote to Finn and Jake (where his lumpiness hits his head and other arm) until LSP shows up and insults the posers. Finn yells at LSP for causing things to go bad. Feeling offended she tells Finn that she's just trying her best and she leaves to go to Promcoming, and suddenly Jake becomes fully lumpy. Jake leaves with the Lumpy Space people to go to Promcoming to the point where Finn says he will destroy Lumpy Space. The posers come back by Finn's hatred of lumpiness and give him the antidote. Finn has to find a way to get to Promcoming, but the posers tell Finn that he will fall into the Lumpy Abyss since he is a smooth person. Finn realizes that in order to make it, he has to be lumpy, so he makes the posers bite him and the multiple bites begin turning Finn lumpy really quick. He crashes into Promcoming and sees Lumpy Jake dancing. Finn tries to make Lumpy Jake to sit on the antidote, but due to Jake's new lumpy behavior, he refuses, just as Finn finally becomes fully lumpy. Lumpy Finn begins to leave with the antidote but Lumpy Jake fights him for it. Eventually, Jake sits on the antidote and becomes normal again and Lumpy Finn also returns to normal. Finn apologizes to LSP for yelling at her and LSP tells them that he and Jake can make it up to her by dancing one last dance with her. Jake responds in a lumpy voice, revealing he still has the Lumps. But Jake says he's kidding and so they dance.
- Princess Bubblegum
- Hot Dog Princess
- Lumpy Space Folks
- This episode became available on iTunes for free two weeks before its official showing.