Jose Ferrer about Abel Gance: "He had written a wonderful screenplay, but the picture ran out of money and was never actually finished."
José Ferrer returns in this film to his Oscar and Tony-winning and Emmy-nominated role of Cyrano de Bergerac. Edmond Rostand's original play features a brief appearance by the Musketeer d'Artagnan, the hero of Alexandre Dumas's novels, in which he compliments Cyrano on his dueling and poetry skills after his duel with Valvert. José Ferrer would later play a Musketeer himself, Athos, in The Fifth Musketeer (1979). Jean-Pierre Cassel would later play Cyrano in The Return of the Musketeers (1989), having played Louis XIII in The Three Musketeers (1973) and The Four Musketeers: Milady's Revenge (1974).
Abel Gance wrote that Italian producers entered in dispute about the filming in Spain. Sojourning in Rome at this time, Nathan Juran was employed in second unit for the shooting of combat scenes, while Gance was shooting the scenes with actors. The Italian associates intended to send Juran in Spain, to make him shoot at their leisure the scenes that suited them, instead of those planned by Gance.
Even though he obviously spoke his lines in French, Jose Ferrer's voice was dubbed by Jean Négroni who specialized in French dubbing and later became the official French voice of Ben Kingsley on numerous films..