Ghost Fly

Synopsis
Jake kills a fly that gets into his soup. However, he and Finn must get creative when the fly returns as a powerful ghost to haunt them.

Plot
Inside the Tree Fort, BMO is trying some Karate techniques he is learning from a magazine, while Finn is reading a magazine called Adventure Boy, and Jake is trying to ignore his "restless leg" problem, Finn then says he's going to sleep, and Jake goes to the kitchen to make soup, wishing that it will cure his "restless leg" problem. While he's at it, a fly comes by and starts drinking the soup, but Jake kills it, and calls the fly a "disgusting, disgusting creature".

After that, Jake tries to sleep, but hears noises coming from the house, and decides to investigate it. He then discovers that the fly he killed has turned into a ghost, and is haunting the Tree Fort. Seeing that he, nor Finn or BMO can handle the situation, they run out of the Tree Fort only to run back in as the ghost fly teleports in front of them. They call Peppermint Butler for help with the ghost fly.

When he arrives, he draws protective circles around Finn, Jake and BMO, and starts talking about his plan, and using his tools that are inside the bag he brought with him, he was going to banish the ghost fly. But right after he says it, the ghost fly comes, steals the bag and hides it inside a trunk in the wall, Peppermint Butler then to jumps out of the window and runs away in fear, leaving the three inside the circles in the house.

Jake tells everyone to wait until morning, because it is allegedly when ghosts go to sleep, but Finn see the pages of his magazine flipping (probably the ghost fly turning it), he decides to to expand the circle with the chalk Peppermint Butler left behind, but fails to continue doing that because he eventually stopped drawing circles, but draw a girl-shaped figure, and because of that, lost the protection of the circle and got possessed by the fly.

The fly, using Finn's body, starts flying after creating wings, and spits on the floor in front of Jake and BMO. Jake says he wants to be a ghost so he could punch that fly in the face, so BMO says he can kill him using a technique learned from the Karate magazine that stops the heart for some minutes. BMO would bring Jake back to life and would 5 minutes later, but he would need unfinished matters to actually become a ghost, so Jake starts telling a joke, and BMO kills him before he could finish, releasing so Jake's soul as a ghost into the ghost world.

Ghost Jake tries to fight the ghost fly, but fails and starts running, while it slices everything on its way with a ghost scythe he created. When they get to the kitchen, Jake accidentally drops the soup, and the ghost fly comes to drink it, because that was it's unfinished matter. Jake kills the fly's ghost, and moments later is brought back to life, believing BMO did it, while he was in fact inside the hospital and Doctor Princess just brought him back to life using defibrillators.

Major Characters

 * Finn
 * Jake
 * BMO
 * Fly

Minor Characters

 * Peppermint Butler
 * Doctor Princess
 * Nurse Pound Cake (non-speaking cameo)
 * Snail

Trivia

 * This episode aired on a Tuesday night instead of a Thursday night. It also aired at a new time (6PM EST).
 * This episode was teased in the loading screen of the Card Wars (Application) in the new Halloween update showing Finn as a fly and giving players a new hero card, 'Ghost Jake'.
 * Despite going to considerable lengths to keep his knowledge of black magic secret from Princess Bubblegum in Nemesis, it is evident from this episode that Peppermint Butler's abilities are known to Finn, Jake and BMO.
 * A defibrillator cannot actually make a heart function again if it stopped.
 * This episode marks the first time Finn is possessed by another soul.

Episode connections

 * This is the second time Jake dies in the series. The first time being "Sons of Mars."
 * The illness Restless Leg Syndrome, which Jake suffers from at the start of the episode, was first seen in the episode "Betty", where the Forest Wizard suffered from it.

Cultural references

 * The Ghost Fly's appearance and the Scythe may be a reference to Death, or Grim Reaper, who wears a coat and wields a scythe.
 * Peppermint Butler standing outside the Tree Fort wearing a hat and carrying a bag is an obvious homage to the famous shot from The Exorcist.
 * When Jake tells Finn what diseases a fly could transmit, he references real life diseases, such as Tuberculosis