- This film was banned from Italy and its stars Redgrave and Reed were threatened with three years' jail time if they set foot in that country. 'Reed, Oliver' described this as his best performance ever.
- Derek Jarman's sets are modeled on the sets of 'Fritz Lang' 's Metropolis (1927). 'Ken Russell' wanted to avoid the cliched look of period films and insisted on anachronistic, even futuristic, design.
- The role of Sister Jeanne was originally offered to Glenda Jackson, who turned it down because she was tired of playing sexually neurotic leads in Ken Russell movies. Judith Paris is listed as Sister Judith in the credits, but is referred to as Sister Agnes in the film.
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