Jill Haworth detested this film and only made it for the money, but she enjoyed working with Roddy McDowall. Years later, when she was visited by McDowall, he brought her a poster for this film, took out a pen and wrote "SH" before the title.
Director Herbert J. Leder purposely wanted the film to have the style of the Hammer horror films that were popular during the 1960s. He directed the camera work and audio effects to deliberately have the characteristics of a Hammer horror film.
Although the film was both shot and released in UK theaters and on U.S. TV in color, the U.S. theatrical release prints of it were released in black-and-white in order to save the distributor money on duplicating prints.
Released to many theaters in the U.S. as part of a double feature with another film that was also produced, directed and written by Herbert J. Leder, The Frozen Dead (1966).
The film was released in Mexico under the Spanish title "La Estatua Viviente" which, translated into English, means "The Living Statue".