After leaving the drive-in circuit in the early 1970s, this movie fell into the public domain. It remained obscure until the mid-1980s, when it appeared on Elvira's Movie Macabre (1981). Afterward, it began developing a cult following that grew with its eventual release on home video.
The house used for the Butler Mansion still stands in Oyster Bay, Long Island, NY.
John Carradine never utters a word in the film. His character's "croaking" noises were dubbed in during post-production.
James Patterson ("Jeffery Butler") died of cancer several months after production was complete. His lines were dubbed by another actor.
The gospel song heard frequently is entitled "In the Garden."