Director Georg Fenady and his producer brother Andrew J. Fenady shot this film back-to-back with Terror in the Wax Museum (1973), with some of the same actors (Elsa Lanchester, Patric Knowles, Shani Wallis, Steven Marlo, Ben Wright, and Leslie Thompson).
Producer Andrew J. Fenady confirmed that the voice of the late Lord Arnold Dwellyn (played by Norman Stuart) was provided by British actor Murray Matheson, veteran of films and television.