A major sequence in which the nuns tear down and ravish a life-sized icon of Christ in an orgiastic frenzy was cut from the film and subsequently vanished. Film critic Mark Kermode discovered the footage many years later. Ken Russell was keen to reinstate the scene but found that Warner Brothers were not interested in doing a director's cut. The footage can be seen in a documentary Kermode made about Russell and was subsequently included in an uncut DVD release.

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.

At the start of the film: "This film is based upon historical fact. The principal characters lived and the major events in the film actually took place."

In 2012 the BFI persuaded Warners to allow them to release the film on video in the UK. Warners refused to allow the director's cut at all and would only allow the BFI to release the original 'X' certificate version on DVD. Warners refused permission to allow a hi rez release. The BFI produced a superb DVD transfer for the first time in its proper 2.35:1 ratio. The Channel 4 documentary 'Hell on Earth' was included but the 'Rape of Christ' sequence was removed. They also cut a line of dialogue when one of the actors refers to Warners as a bunch of 'c**ts'. Before this in the USA the 'unrated' version appeared as an upcoming release complete with sleeve art. 24 hours later Warners stopped the release!

Featured in Omnibus: Russell's Progress (1971)