Heat Signature (episode)

"Heat Signature" is the twenty-sixth episode of the second season of Adventure Time.

Synopsis
Marceline plays a prank on Finn and Jake by making them believe they're vampires, but it nearly goes too far when they're manipulated by her ghost friends.

Plot
It's dusk, and Finn and Jake are visiting Marceline to show her the movie Heat Signature. When they enter her house, Marceline introduces them to her ghost friends, Wendy, Booboo, and Georgy. Finn and Jake then try to have a seat on Marceline's couch, but it is apparently very uncomfortable. Marceline says she never really uses her couch because she's always floating, so after a short session of deliberation between the two, Finn and Jake decide that they want to be turned into Vampires. Marceline agrees to turn them into Vampires, but wispers to her friends that she has something even better in mind. Marceline tells them to close their eyes or their heads would explode. Rather than biting them, she merely pinches their necks and dabs ketchup on them to simulate a bite wound. When she's done, Finn & Jake are asked how they feel, Finn says he feels the same, and Jake says his neck hurts.

Marceline and the ghosts then perpetuate their prank by making Finn and Jake think that they can suck the color from things like Marceline and turn invisible. However, it soon becomes apparent that the ghosts are more concerned with hurting Finn and Jake when they kick the two for no reason and try to kill them by tossing them off a tower. Marceline becomes angry at the ghosts for trying to hurt her friends, but they simply ignore her and conspire to eat Finn and Jake's organs through their heads after they lure them to their home with an invitation to a party. Marceline warns Finn and Jake of the imminent danger, but they ignore her and attend the so called party anyway, where they are almost devoured. Marceline arrives just in time, seemingly to save them, but she says that she can't defeat the ghosts and was only there to apologize. Finn laments that they are about to die just because they wanted to be comfortable watching Heat Signature. This reminds the ghosts that they wanted to watch the movie, so they go back to Marceline's house and watch it. Finn and Jake however would rather be eaten then have to endure the uncomfortable furniture, but Marceline and the ghosts are so captivated by the movie that they don't even care.

Major Characters

 * Finn
 * Jake
 * Marceline
 * Wendy
 * Booboo
 * Georgy

Minor Characters

 * Lumpy Space Princess
 * Lady Rainicorn (drawing in title card only)
 * Snail

Music

 * Oh, Baby Yeah

Trivia

 * This is the last episode of season two.
 * This episode was originally titled "Blood Drive". The address of the ghosts' mansion in the episode is 25 Blood Drive.
 * The title card has Jake spraying red paint on a billboard for Heat Signature in a destroyed urban background, and what he is painting is Lady Rainicorn.﻿ The tagline "Under the ocean no one can hear you die" is printed near the bottom of the billboard.
 * This is similar to the tagline of the 1979 horror film Alien: "In space, no one can hear you scream."
 * The plot and title of this episode refers to the first Heat Signature film; in previous episode "Video Makers", the intended movie for the film club was the third in the series, Heat Signature 3.
 * This episode was originally scheduled to air on April 25, 2011. However, due to a last minute programming change, it was moved to Monday, May 9, putting it after the two-part episode: "Mortal Folly" along with "Mortal Recoil". Most likely, this episode occurs chronologically before the episode "Mortal Folly", probably happening after the events of the episode "Video Makers".
 * In the episode "Video Makers", Finn and Jake said they would not show any more movies that have the copyright warnings on it, but in this episode they wanted to show another movie that would have the warning on it. However, there are two reasons as to why Finn would be able to:
 * This episode occurs prior to "Video Makers", thus Finn would not have fully realized the government warnings that would make him stop airing any videos prior to the Mushroom War.
 * As opposed to "Video Makers", where Finn and Jake were publicly showing the videos as part of a film club, this was a private viewing at Marceline's house. The government warnings prior to videos specifically state that they are for private usage only and can not be publically viewed under certain circumstances. Thus, their usage in this episode would be in line with government warnings, while their usage in "Video Makers" would not.
 * Marceline's clothes in this episode are re-colors (Orange/red shirt, brown ripped jeans, and dark gray boots) of the clothes she wore in her very first appearance. There are some minor modifications, such as her ripped pants and shorter boots.
 * This is the third episode where you can see Finn's hair. When Marceline lifts his hat to "bite" him, you can see a hardly visible amount of his hair. The other times are in "To Cut a Woman's Hair" and "Mortal Folly".
 * Lumpy Space Princess remains homeless, as first seen in "To Cut a Woman's Hair".
 * Since it was the last episode of season 2 due to rescheduling, it is chronologically the season 2 finale.
 * This is the first episode to feature other Humans than Finn. Except maybe Susan.
 * Even though it aired on May 9th, a promo for the episode aired before the premeire of Mortal Folly
 * Even though Wendy has arms, she hands Finn and Jake an invitation with an arm located under her dress
 * When the ghosts take Finn and Jake for their "floating lessons" they take them to what looks like an abandoned tower with a crashed helicopter on it. This may be from the Mushroom War.
 * The house of the ghosts makes a short reference to classical horror movies of a haunted house, over a hill, with stormy weather.
 * The couch in Marceline's house, which is apparently uncomfortable and hard, appears soft in Go With Me, and neither Finn or Marceline expressed any discomfort while sitting in it.