Actor Arthur Batanides stated that he believed that the house where they shot this feature once belonged to Mary Astor.
Completed in six days by at least May 1957.
Despite the title, the plot of "The Unearthly" contains no extraterrestrial element.
The Lobo character here (who can speak) was created by writers Mann and Black. He is a different character than the mute Lobo created by Ed Wood Jr. in "Bride of the Monster" and "Night of the Ghouls". Screenwriter Jane Mann was the wife of director Boris Petroff.