Heat signature: Marceline pranks Finn and Jake into thinking that they're vampires.
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The episode "Evicted!" from the series Adventure Time is the 12th episode in season 1 and also the entire series.
Up a Tree - Season 5, Episode 4.
The Great Egg Adventure
Marceline Sings the song "I'm Just Your Problem" in the episode of Adventure Time entitled "What Was Missing". The episode was the 10th in season 3, and the 62nd in the series. It aired on September 26 2011.
The episode with all the little people is the aptly titled season 5 episode 'All The Little People'.
this time by John Legend
Because no one liked his character Andy and they wanted a twist with every end of each season Season 1 last episode ~ Andy Dies Season 2 Last Episode ~ Dan Moves Season 3 Last Episode ~ Prue Dies Season 4 Last Episode ~ They Get A Chance 2 be Mortal Season 5 Last Episode~ Leo Becomes an Elder and has 2 leave the charmed 1s Season 6 Last Episode ~ Chris Dies Season 7 Last Episode ~ Charmed Ones Fake Own Death Season 8 Last Episode ~ Piper goes back in time 2 save phoebe and Paige and they get Leo back
In the episode Bad Little Boy (Season 5, Episode 11), Marshall Lee fakes his own death.
Finn takes his hat off in "To Cut A Woman's Hair" (season 2, episode 10)
The 2nd episode of Adventure Time is entitled "Trouble in Lumpy Space".
The last episode in Season 6 Remember Me as a Time of Day Episode 24 - Season 6
The episode that Rainicorn has her babies is entitled "Jake the Dad". It is the 110th episode in the series and the 6th episode of season 5. The episode aired on January 7th 2013.