There are also notable similarities of this film with one of its contemporaries, "The Unearthly" (1957) by Boris Petroff. In both films: the characters gather at an isolated location far from the city, a charismatic deceiver exploits other humans for his own purposes, promising them extraordinary services, undercover agents of the law manage to expose the conspiracies, and the villains meet their fates at the hands of someone they previously exploited. Tor Johnson also plays a character called "Lobo" in both films, and both of the Lobo characters are working for the main villains. Both films were shot around the same time, though it is unclear if one was intentionally modeled after the other.