Cinematographer Pierre Lhomme claimed that the last surviving, watchable print of the movie had turned completely pink with age. He later supervised the 2k resolution, digital restoration of the film at the Eclair Laboratories in Paris.
For the shot depicting German soldiers marching down the Champs Elysees, Jean-Pierre Melville thought that it would be impossible to get regular Frenchmen to provide the proper marching movements. He ended up casting dancers to correctly provide the march steps he wanted from the soldiers. This shot was originally the last in the film and prints were sent to theaters with it in that place. After the first showings, Melville decided the scene was better placed at the start of the film and it was physically spliced into the new position. This apparently resulted in several missing frames in the negative. These frames were restored from another source when the 2005 digital restoration was accomplished.
In the dubbed Italian version for the film, Lino Ventura is dubbed by Emilio Cigoli; Simone Signoret by 'Adriana De Roberto' and Paul Meurisee by Roberto Villa.