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 & Jake are visiting Marceline's Cave. Finn mentions that he is suprised that Marceline has been alive for 1000 years yet she has never seen Heat Signature, he goes onto to say that this movie "will blow their minds." The duo arrives at Marceline's House where Marceline introuduces her ghost friends, Wendy, Booboo, and Georgie. Finn and Jake jump onto Marceline's couch only to be surprised by how rock hard it is, Marceline says she usually floats and doesn't use the couch much. Finn & Jake ask to be made into vampires so they can float instead having to use the uncomfortable couch. She agrees, much to the chargin of her ghost friends, and preforms a "biting ritual" to turn Finn and Jake into vampires. She confides with her ghost friends that she "has something way more fun 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. The Ghosts ask if they want blood and they both reply sure. Finn & Jake have a minor freak out about how to go about feeding, but Marceline reminds them they can subsist on shades of red and proceeds to play an additional prank on them with an apple. The duo ask if they're ready to float, but Marceline insists that it's to advanced for them. Instead she says they must go through "Vampire Orientation." After that she tricks Finn and Jake again, making them think they're invisible, they run into LSP's hobo camp to try to scare her but accidentally ruin her food. Unbeknownst to them, LSP can see them just fine and she attacks them. Marceline's friends decide to "join in on the fun" by scaring LSP themselves. The ghosts then add the next part of orientation by roughing Finn & Jake up, afterward they tell Finn & Jake they're ready to fly, much to the disdain of Marceline. Marceline attempts to stall them by teaching them a "scary vampire walk," but the ghost fly them to the top of a nearby tower and push them off telling Marceline they have plan. When Finn & Jake have fallen about halfway down they reveal their plan to let them die and Marceline saves them (while invisible) making them think they could fly. The ghosts invite them to their place for a party, but Marceline urges them not to go. Finn and Jake don't heed her warning, and go to 25 Blood Drive for the party where they are attacked by the now giant ghosts, F&J realize they aren't vampires and give up as the ghosts begin to suck their guts through their heads. Marceline jumps in and apologizes to Finn and Jake and explains that she can't save them. Finn mentions "Heat Signature" and the ghosts decide to watch the movie instead of killing F&J, the episode concludes with the duo complaining about how uncomfortable Marceline's couch is and that they wished they were still being attacked.

Major Characters

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

Minor Characters

 * Lumpy Space Princess

Trivia

 * This episode was originally called "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 may or may not be a refrence to the upcoming episide "No One Can Hear You" in season 3.
 * It is also similar to the tagline to 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". This makes "Heat Signature" the new season finale. Most likely, this episode is chronologically before the episode "Mortal Folly", probably happening after the events of the episode "Video Makers ".
 * 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 Marcalene 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. This is the first time that Jake sees her in this condition. (since only Finn met with her in the former episode)
 * The street name in this episode, "25 Blood Drive", is a reference to the working title of this episode.