[s2e26] Heat Signature -

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

There are at least three films in the Heat Signature franchise mentioned in the episode. Episode Plot Context [S2E26] Heat Signature

Within the show's universe, Heat Signature is a pre-war film series that Finn and Jake consider a must-watch. Key details include: It is described as a thriller/horror film set underwater

You can find more details about this episode and others in the Adventure Time Viewing Guide or explore more lore on the Adventure Time Fandom Wiki . Sygnatura cieplna (film) | Pora na Przygodę! Wiki | Fandom [S2E26] Heat Signature