Heat Signature (movie)

Heat Signature is a series of pre-war movies, which consists of at least three films. The film's tagline: "UNDER THE OCEAN NO ONE CAN HEAR YOU DIE" seems to suggest that it is a horror film or at least a thriller/suspense, though the actual genre is unknown. The plot is also mystery, but it undoubtedly involves a submarine. Heat Signature has been referenced in several episodes, "Video Makers" and "Heat Signature." In "Video Makers" the third film was set to appear as the movie during Finn and Jake Movie Club, but was canceled due to copyright warnings. In the same episode, Marceline seems to have prior knowledge of the movie, asking "Oh, with the submarine?" In "Heat Signature" Finn mentions how strange it is that Marceline is 1000 years old and has never seen it, both this and Marceline's previous comments seem to show that this movie was popular in its day. Finn also seems to like the movie quite a bit, stating that "it would blow their minds" in reference to Marceline and her friends who had not yet seen it.