This film is a virtual rehash of The Devil Bat (1940), which had been one of Producers Releasing Corporation's (PRC) biggest successes.
Doctor Lambert, I wish there had never been any such thing as Aztec Indians! Father does nothing but think, dream and talk Aztecs!
Mary Forbes (Hope Kramer) is referred to as the daughter of Professor Andrew Forbes (George Zucco) in the first half of the movie. Later she is called his stepdaughter.
Director Jean Yarbrough's name spelled as ``Yarborough'' in credits.