Burning Low

"Burning Low" is the sixteenth episode in the fourth season of Adventure Time.

Synopsis
Princess Bubblegum tries to warn Finn why he can't hang out with Flame Princess anymore because of her elemental matrix that can't take extreme romance, but he and Jake just think she's jealous.

Plot
The episode starts when Finn finishes building Flame Princess' new house, which Flame Princess loves. A small fire spreads to Finn's feet, which he says doesn't hurt as much as it used to. The fire accidentally spreads to the rest of his leg and he screams, then runs in a panic towards a nearby lake. Flame Princess and Jake then rush to the side of the cliff and look at the water to see if Finn is alright. After doing some tricks that Flame Princess and Jake think are funny, Jake pulls him back up on land. Flame Princess thanks Finn for building her new home. Finn and Flame Princess try to hug, but they're interrupted by Jake, who knows that Finn would be burned by her. Jake wraps Finn in tin foil and when he is finished, Finn and Flame Princess hug. They let go after a while, and then Finn and Jake walk away into the forest, saying goodbye to her.

Finn didn't know if the hug was okay and asks Jake for tips. Jake's advice is to "let things take their natural path" and he explains some "junk" about dating. He creates 15 tiers, which are a set on stairs he made on his arm with Stretchy Powers and then explains that Finn is "at Tier 1, which is hugging, but pretty soon, you'll be at Tier 2, which is smoochin'." Jake then explains about tiers 5 and 8, using references that would apply only to Lady Rainicorn, such as "touching her horn for the very first time." When Finn points out Tier 15, Jake tells him to "stay away from that." He then tells Finn that he needs a shower because he smells. The two enter the treehouse, to see Princess Bubblegum has broken in to collect taxes. Finn then tells Princess Bubblegum to "not inhale" while he goes up a ladder to take a shower. Jake then reveals in an outburst to Princess Bubblegum that he's hanging out with Flame Princess. Princess Bubblegum is distraught from this, and quickly runs off, forgetting the taxes. Jake is confused, but is interrupted by a video chat with President Porpoise. The next day, as Finn is going to leave to hang out with Flame Princess, he is stopped when Princess Bubblegum is standing in the doorway, causing Finn to shriek in surprise. She then attempts to explain to the duo why Finn can't see Flame Princess, but in the process, Finn leaves and Jake falls asleep. Princess Bubblegum asks Jake to tell Finn why he can't be with Flame Princess, but he wasn't listening to Princess Bubblegum and then thinks that she's really jealous of Finn and Flame Princess.

Later, Finn returns from his date with Flame Princess, not accomplishing Tier 2. Finn asks what Princess Bubblegum was talking about and Jake tells him that she's jealous of Finn and Flame Princess, which makes Finn frown. Jake then tells Finn that the best way to get to Tier 2 is with a "sappy poem." He helps Finn write one, but as Finn is explaining his feelings toward Flame Princess and how she makes him feel, Jake falls asleep again. Finn is seen later at a hill at sunrise trying to gain inspiration for the poem, which succeeds when the sun comes up. Then Princess Bubblegum shows up and asks if Jake explained why he can't see Flame Princess anymore. Finn retaliates by saying that he loved her, but she didn't love him back. He assumes that Princess Bubblegum is trying to get him to fall in love with her again, to which he claims that he's ready to move on and that he won't let her ruin everything. Finn leaves, and a clearly confused Princess Bubblegum picks up one of the scraps of paper Finn wrote on and quietly exclaims "Oh, no!" Jake is later seen making and singing Bacon Pancakes, when Princess Bubblegum appears again and asks Jake if Finn is with Flame Princess. Jake says that that's his "man's biz." When she continues to pry at the subject, Jake retaliates by yelling at her. Princess Bubblegum explains that Flame Princess's elemental matrix can't handle extreme romance, and that if Finn kisses her, Flame Princess will burn through the Earth's crust to the core, destroying it from the inside. Princess Bubblegum then says that's why she had the Flame King lock her up inside the lantern, to contain her.

The two rush over to Flame Princess's new home, where Finn is reciting his poem to Flame Princess, but midway through, it gets burned to ashes. They move closer together, and Princess Bubblegum gasps 'NO!' Finn and Flame Princess kiss passionately, causing Flame Princess to burn very brightly, explode, and start burning a hole through the Earth's crust. Finn (who appears to have been injured due to the kiss because his lips and parts of his face are burned) grabs one of Jake's arms, ties it around himself, and jumps into the hole after Flame Princess. Jake struggles with the weight and falls on the hole, sealing it. Princess Bubblegum says that if Jake is depriving Flame Princess of oxygen for 24.8 seconds, she will burn out, which will stop the process. Finn reaches Flame Princess and sees that she has passed out and turned a very light shade of blue. Finn (struggling to breathe) says that he needs her "to be okay." He kisses her on the mouth again, which revives and stabilizes her, though it causes Finn to pass out from the lack of oxygen. Jake pulls the two up. Finn (who appears to be even more burned) awakens and asks Flame Princess if she is okay. Finn then kisses a rock, and holds it out to Flame Princess who also kisses the rock (it smokes a little bit) to symbolize them "kissing." The two walk off, and as this happens Princess Bubblegum sighs sadly and whispers "Oh, Finn." She turns around and sees Jake staring at her with a grinch smile and he says, "Jeeeallous?" to which she replies, "shut up".

Major characters

 * Finn
 * Jake
 * Princess Bubblegum
 * Flame Princess

Minor characters

 * BMO
 * Morrow
 * Tree Trunks
 * Snail
 * President Porpoise

Mentioned

 * Lady Rainicorn
 * Flame King

Songs

 * Bacon Pancakes

Trivia

 * This episode had over 3.5 million viewers, currently making it the highest rated episode of the series.
 * When Jake was drawing in the mud at the beginning of the episode, he was drawing Lady Rainicorn.
 * When Princess Bubblegum is explaining to Jake why Finn cannot see Flame Princess, her holo-screen contains:
 * y = mx + b ± c which is the formula for a line on a Cartesian coordinate plane, except the "± c" is superfluous.
 * A picture of the Earth with the giant crater.
 * Finn and Jake pay taxes to the Candy Kingdom, even though they live in the Grass Lands.
 * Flame Princess' quote, "Do the thing that I like!" hints that Finn and Flame Princess have been going on dates since "Incendium"/"Hot to the Touch."
 * The foil Jake uses to wrap Finn before hugging Flame Princess is called "Foiled Again."
 * When Jake explains the tiers to Finn, he's talking about his and Lady Rainicorn's relationship.
 * The box Jake is using to cook from holds enough pancake mix for a 200 ft tower of pancakes.
 * Princess Bubblegum diary entries include:
 * FINN + LOVE + FLAME PRINCESS.
 * A formula containing the Chinese character for romantic love, 愛, and ∞ the symbol for infinite
 * A formula containing the information "AUG," "18," and "y=2012."
 * When Finn is reciting his poem to Flame Princess the lines that can be heard are, "...your wavelengths are my weakness, your emissions are what I've been missing." The storyboard includes a slightly longer poem with the line, "The gradation of your radiation is hypnotizing my eyes."
 * In the original storyboard, Jake's video chat was with Lady Rainicorn instead of President Porpoise.
 * Jake's video chat with President Porpoise could be the cause of the dream he had during Princess Bubblegum's lecture.
 * The theme song of Burning Low is played when Finn and Flame Princess are kissing.
 * There was a deleted scene when Jake was showing Finn "Tiers" and the deleted scene was "Then you'll go to Tier 9. Just be sure you have a comfy place to sit the next day, because you'll have to reflect on what you've done."

Episode connections

 * The title card is a reversal of the title card for "Incendium." Finn is crying with photos of Princess Bubblegum in Incendium, while it is reversed in Burning Low with Princess Bubblegum crying with photos of Finn.
 * Jake acknowledges how much Princess Bubblegum hurt Finn back in "Incendium."
 * This is the second time Flame Princess burned out. The first time was "Incendium."
 * The music that was played on BMO was used in a title card for "My Two Favorite People."
 * This is the second time The Morrow has appeared, the first was "Death in Bloom". The way Bubblegum calls the Morrow is different from "Death in Bloom" (which was a scream).
 * This is the second time the fate of the world has been at stake, with the first being in "Mortal Folly."
 * Flame Princess is the second princess to leave her kingdom and live on her own, the first being Lumpy Space Princess in "Heat Signature."
 * This episode puts the fate of the Marauders in question as Flame Princess' new home is in the exact same spot that the Marauder Village used to be, insinuating her house is made of debris from the destroyed village. Finn throws a Maurader helmet into the fire as the finishing touch for Flame Princess' new home.

Errors

 * When Jake is cooking, the front right burner of the stove is on, but when he turns around to talk to Princess Bubblegum, the front left burner is on.
 * Also, while singing the short piece Bacon Pancakes, while Jake sings "makin' bacon pancakes. Take some bacon and-", the pan which he is using briefly appears to be behind the stove and the fire, then later returns to its proper place on top of the stove.
 * When Finn is outside at sunrise, if you look closely, you can see a dot above a giant cloud on the right.
 * The first time you see the "Pancake Tower" box, tower is displayed as "Touer."
 * When Jake is explaining the tiers to Finn, the difference in steps between tier 8 and tier 15, which is the end of Jake's hand, is only 2 steps and not 7.
 * When Jake pulled Finn and Flame Princess out of the hole, he did not get burned from Flame Princess.
 * When Finn jumps in the water with fire from Flame Princess on him, she doesn't look hurt from the fire going out.

Videos
File:Adventure Time - Burning Low (short preview)|The short preview. File:Adventure Time - Burning Low (long preview)|The long preview. File:Preview - Sons of Mars Burning Low|The long preview 2. File:Sneak peek of flame princess and finn episode|Comic-Con sneak peek. File:"Burning Low" Animatic|Animatic