The Devils Goofs/Mistakes
- Movie Goof (revealing mistake): Judith Paris's character is referred to as Sister Agnes in the film but listed as Sister Judith in the credits.
- Movie Goof (continuity error): Early in the movie when Urbain Grandier (Oliver Reed) is seen grooming his hair. It is a close-up of him supposedly looking at a mirror in the upper left hand corner of the screen, behind the viewer. Obviously there is no mirror as he consistently misses combing the more egregiously messed up parts of his hair and instead repeatedly combs the portions that are already groomed. In fact when he is done, his hair is still messed up.