Incendium

"Incendium" is the twenty-sixth and final episode in season three of Adventure Time.

Synopsis
After being rejected by Princess Bubblegum, Jake searches for another girl for Finn, which leads him to the court of the Fire Kingdom to win its princess.

Plot
The episode opens with Princess Bubblegum showing Finn and Jake her new liquid fireworks when Fin makes an attempt to put his head on her lap only to be told by her "Don't be weird, Finn." Finn begins to break down and in an attempt to cheer him up Jake seeks a new love interest for Finn. He stumbles across Flambo, who directs him to the Fire Kingdom, where he is introduced to the Flame King and his daughter. Jake announces himself as the "Duke of the Grasslands" and then attempts to win over Flame Princess for Finn. After two failed atempts he stretches his stomach to look like Finn who begins to attack him and (seemingly) kill him. This impresses the Flame King who states that a prince willing to kill his bafoon is welcome to date his evil destructive daughter. Flame Princess walks over to the Finn shaped Jake embraces him. Some fire people state that she seems normal, and FP responds by shooting fire at them and turning the into Flambo-like creatures. Seeing she is evil, Jake says he does not like her anymore. Flame Princess is enraged and starts rampaging. Then she follows Jake into the tree house,and starts a fire. Jake tries to warn Finn, but he stays on the floor. the fire comes into the tree fort, and destroys Finn's picture of PB. Finn is enraged by this,he looks out the window to see Flame Pricesses' monster form scaling the tree fort. Flame Princess sets off the rest of PB's liquid fire works by accident. Finn shouts at her to not touch PB's stuff. The drops from the fireworks hit Flame Princess and douses out her flames. This reduces her to her normal girl form, which shocks Finn to relize it was a girl. She falls and Finn catches her in his arms. She wakes up and asks Finn why he doesn't like her. Finn says that he does like her. Flame Prinncess blushes and tells Finn to leave her alone and leaves. The episode ends with Finn saying, "Jake, I think I have a crush"

thumb|300px|right|Short preview

Main Characters

 * Finn
 * Jake
 * Flame Princess
 * Flame King
 * Flambo

Minor Characters

 * Beemothumb|300px|right|Extended previewthumb|300px|right
 * Princess Bubblegum
 * Fire People
 * Volcano Giant
 * Fire Kingdom Jester
 * Fire Wolves
 * Robot Owl
 * Snail

Songs

 * All Gummed Up Inside
 * Jake's Serenade

Trivia
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 * This episode was previously titled "Heart of the Fire Kingdom".
 * According to Adam Muto, "Incendium" features "some Rebecca Sugar songs", and several new characters.
 * Incendium means "fire" or "burning" in Latin.
 * This is the second episode with its name in Latin. The first was "Morituri Te Salutamus."
 * The "wad of hair" from "To Cut a Woman's Hair" and "What Was Missing" returns once again.
 * In the preview, Ricardio's voice (George Takei) seems to be narrating, which is most likely because the episode premieres the day before Valentines day.
 * This episode demonstrates that Jake can play acoustic guitar, first shown in the episode "Susan Strong".
 * This is Adam Muto's and Rebecca Sugar's last episode as a team (see promo art). As from this episode, Adam Muto was promoted to creative director and Rebecca Sugar will work together with Cole Sanchez.
 * Even though the episode airs at 7:30 PM, the promo art says it airs at 8:00, a mistake made because of a habit back when episodes aired at 8 PM.
 * Rebecca Sugar said it's the episode when she could finally make Finn cry, although he cried briefly before in "Jake vs. Me-Mow".