[s2e26] Heat Signature [VERIFIED]

It is described as a thriller/horror film set underwater.

In the context of the episode " Heat Signature " (Season 2, Episode 26) , the "feature" refers to the fictional movie of the same name that Finn and Jake are trying to watch. About the Movie "Heat Signature" [S2E26] Heat Signature

In the episode itself, Marceline convinces Finn and Jake that her ghost friends can turn them into vampires so they can survive a trip to a "ghost dimension" to watch the movie. However, it turns out to be a played by Marceline and her ghost friends, who lead the duo through a series of "vampire" tests that are actually just dangerous stunts. It is described as a thriller/horror film set underwater