King Worm (episode)

Synopsis
Finn has a vivid dream that may be more than it seems.

Plot
The episode starts with Finn waking up to Princess Bubblegum calling him her king and husband. Noticeably, the "ears" on Finn's hat are longer than usual. Finn realizes he is on the Candy Throne wearing a crown and is being watched by a group of Banana Guards, who chant, "Long live the king!" His crown floats to the ceiling and when he looks at the group of Banana Guards again, they are upside-down except for their faces. He looks at Princess Bubblegum's shoulder and sees the King Worm. Finn thinks he recongnizes the worm, who jumped out a window. Princess Bubblegum's face appears on the back of her head, and she whispers to Peppermint Butler, "He doesn't know he's dreaming." Finn is confused, and the scene changes. Finn is sitting in a forest with Flame Princess, who calls him "honey" and tells him to eat his soup. He doesn't respond and Flame Princess angrily yells for him to "Eat it now!" He eats some of it and closes his eyes and the room morphs to a room like one in the Tree Fort. Flame Princess's eyes turn into mouths for a brief moment and she soon changes into Peppermint Butler, holding the King Worm, Peppermint Butler then grows a second head and explains that Finn is trapped in a dream. His face then becomes blurry and his hand turns into worm-like creature who explains to Finn that he needs to find the worm and break it. Finn points out that Peppermint Butler is holding the worm, but it turns into a spoon. Phil pops up behind Peppermint Butler from his pants and Peppermint Butler throws the spoon at Finn. Finn notices Jake in another room through a window, but the room appears to be upside down. Jake is wrapping a gift with Lady Rainicorn, who has two mouths and is speaking English in a very deep voice. One of her mouths spits out tape that Jake uses for the gift. Lady Rainicorn then tells Jake to play his viola, and he does. A music note comes out, then turns into the worm. Finn sees the worm escaping through a small hole in the wall and jumps in the room after it. He and Jake start to talk and they realize that they are in a linked dream with one another. Jake states that he doesn't think Lady Rainicorn is real and they decide to follow the worm through the hole, which is a problem because the hole is too small.

Jake explains that because it is a dream, Finn can do whatever he wants. He then imagines a sword capable of blasting a hole in the wall and is happy with himself for not dreaming up weird stuff. The sword then turns into a shark and Finn freaks out. Jake tells him that he needs to be careful, because if he fills the world with his subconscious fears it will fall apart. Jake tells him to just shrink down and the two of them go through the worm's hole. They wind up in a field with Ice King running towards them. Ice King calls them Fionna and Cake and tells them that he's really made a mistake. Finn and Jake are confused until two monsters made up of a bunch of penguins show up. Finn and Jake run away until they find their dad, Joshua, who isn't responding to anything they say. Joshua starts knitting, and eventually his knitting turns into the King Worm. King Worm then bolts to a nearby mountain and Finn imagines that he and Jake have gigantic legs. Jake complains that it is boring for him as it is his normal power, so Finn imagines that he has a bird instead of legs. As they chase after King Worm, it starts raining Lumpy Space Princesses. When they reach the top, they find a frozen King Worm. They grab a nearby rock that appeared from nowhere, break the worm, and the dream fades away.

Finn and Jake "wake up" in their room and start asking one another if they're okay, and celebrate that they did it. (Notably, the "ears" on Finn's hat are still longer than usual.) Finn then notices a mirror wavering in the background, and upon closer inspection realizes his reflection is Farmworld Finn. Jake then tells him that it's fine, but when he turns his nose is huge. Finn then points at a mug filled with liquid that's falling to the floor, breaking and then reversing back to its initial state repeatedly. Finn realizes that Jake pinched him earlier, but he never pinched Jake back. He starts trying to pinch him, but Jake backs away telling him that everything is fine. When Finn finally catches and pinches Jake, his skin melts away and Finn realizes for sure that he's still dreaming. King Worm then rises from the melted Jake, and says that Finn can't defeat him. He proclaims that he will keep Finn in the dream-scape until he has consumed all of his "life energy." Finn yells that he uses that, and starts to attack, but realizes something is missing and gets depressed. He sadly states that he will be stuck in the dream-scape forever, revealing a significant fear. The ceiling cracks and a chunk falls on King Worm's head. He tells Finn to "knock it off" which causes Finn to remember what Jake said about fears breaking down dream-scapes.

Finn concentrates on his deepest fears and saltwater begins to pour from his navel and fill up the room. The Lich then crawls out of his bellybutton and Finn freaks out. The clearly deteriorating worm tells him to calm down, to which he replies, "Never!" Princess Bubblegum comes out next and Finn starts to feel relieved until she tells him to quiet down because she's having coffee with The Lich and he wouldn't understand because he's "too young." This freaks him out even more, and causes more damage to the worm. He then goes into a crib and remembers Ghost Lady and continues to be horrified as the worm deteriorates to near nothing. He asks the King Worm to stop one final time, but the worm claims he doesn't know what Finn is talking about. Finn strains and a clown pops out of his navel. The dream breaks and Finn is with Jake in his living room with the shriveled King Worm and his minions; the minions suddenly explode. Finn then orders the worm to get out of his house, and the worm complies meekly. Finn pinches Jake to be sure he's awake, and the episode ends.

Major characters

 * Finn
 * Jake
 * King Worm

Dream characters

 * Princess Bubblegum
 * Peppermint Butler
 * Shark Sword
 * Ice King
 * Ice Penguin Monsters
 * Joshua
 * Flame Princess
 * Ghost Lady
 * Lady Rainicorn
 * Phil
 * The Lich
 * Banana Guards
 * Lumpy Space Princesses
 * Fear Feaster
 * BMO
 * Jake (First Jake)
 * Farmworld Finn (cameo)

Minor characters

 * Snail
 * Worms

Mentioned

 * Fionna
 * Cake

Trivia

 * While Finn was dreaming, the nubs on his head were longer than usual. However, during the scene where his legs grow bigger, the nubs return to normal size.
 * In the scene where Finn and Jake climbed a mountain, the raindrops and snowflakes were little Lumpy Space Princesses.
 * The sword that Finn conjures in his dream has the same appearance as the sword from the Adventure Time logo, except with minor color differences.
 * When Phil appears he says, "Satori," which is a term used to define a deep meditative state in which an individual becomes enlightened.
 * The music in the long preview was used in the "Burning Low" trailer.
 * This is the first episode Flame Princess is in that does not have a fire related title.
 * The symbols used below the promo art are examples of optical illusions.
 * This is the first episode where Finn calls Peppermint Butler  "Pep But."
 * Almost all of the major characters are seen in this episode, the only major character not seen is Marceline.
 * Lady Rainicorn speaks English in this episode.
 * The scarf that Joshua knits looks similar to the scarf that Tree Trunks knitted in Legends of Ooo.
 * When Finn chases after King Worm in the room with Lady and Jake, you can see Finn's echo run backwards in the mirror.
 * The ambient background music heard when Finn sees his alternate form in the mirror is the same ambient music heard throughout Farmworld in the episodes "Finn the Human" and "Jake the Dog."

Cultural references

 * Some of the scenes were inspired by Youtube Poops.

Episode connections

 * When the dream is broken, the background and character positions are similar to the scene at the end of "Evicted!"
 * Finn's fears are all things that have been mentioned in past episodes:
 * Fear Feaster and the Ocean from "Ocean of Fear."
 * The Lich from "Mortal Folly."
 * Princess Bubblegum saying that Finn is "too young" from the song My Best Friends in the World in "What Was Missing." And Jake telling Finn that he is "too young" for Princess Bubblegum multiple times in the series.
 * The Ghost Lady from "The Creeps."
 * Clowns, such as in "Another Way."
 * Likewise, Finn's dream seems to foreshadow future events:
 * When Finn sees himself in the mirror, his face resembles the face of Earl of Lemongrab, as well as the face BMO had at the end of his dream in "BMO Noire." Also, his arm is mechanical as seen previously in Finn's meditation vision of himself in "Mortal Folly." This vision foreshadows Finn in the "alternate universe" in the final scene of "The Lich," almost all of "Finn the Human" and some of "Jake the Dog."
 * The Gunter monster foreshadows the events of "Reign of Gunters."
 * When Finn turned his and Jake's feet big is dreamed again by Jake in "The Lich" where he got big feet.
 * Ice King refers to Finn and Jake as Fionna and Cake, without knowing the difference. The gender-swapped counterparts first appear—in Ice King's imagination—in the eponymous season 3 episode, and return in season 5's "Bad Little Boy."
 * When Finn is transported to the library and is looking in at Jake and Lady Rainicorn through the window, the bookshelves contain the books, whose titles end in "-itties," from "Paper Pete."
 * The shape of Lady Rainicorn's second mouth is very similar to the design from the Animated Short.
 * When Finn tries to pinch Jake, the song from the title song "His Hero" plays.
 * Jake's bird feet are like the one Jake gets from the power of the wand in the episode "The Wand."
 * The hole that Finn and Jake travel through is literally a "Wormhole" leading into another dream universe forshadowing the multiverse theory explained in the episode "The Lich."
 * The first phrase "Long live the king" and Finn wearing a crown might be a foreshadow for when Farmworld Finn wears the Ice King's Crown in "Finn the Human."

Production notes

 * The episode was originally titled "Worm King."