“Doctor X” was the second Warner Bros. movie to be filmed using the improved Technicolor process which both removed grain and improved the colour and clarity of the film. Starring Fay Wray, Lee Tracy and Lionel Atwill, the film was directed by Michael Curtiz (best known to history as the director of “Casablanca”.
The film’s plot is complex and intricate, a murder mystery and a monster film in one. It was produced before the motion picture Production Code came into force, and thus was able to feature mature themes such as murder, rape, cannibalism, and prostitution.
Seven years later, the film spawned a sequel, “The Return of Doctor X”, but thanks to differences in cast and crew, plus the effects of the Hays Code, the similarity between the two films begins and ends with the titles.
Science Fiction Double Feature – Rocky Horror Picture Show original cast