Richard Dreyfuss (who plays Col. Picquart in this film) has claimed to be a descendant of Capt. Alfred Dreyfus (played by Kenneth Colley), the main character in this film.
The last Ken Russell directed film to feature Oliver Reed.
Based on the same historical events as depicted in The Dreyfus Case (1930), The Dreyfus Case (1931), The Life of Emile Zola (1937), I Accuse! (1958) and An Officer and a Spy (2019).