Uniquely for British- and American-produced World War II films of the time, all French and German characters speak in their own languages, with subtitles running below in English. Another version, which was shot simultaneously, has all the actors speaking their lines in English. (This version was used for the film's trailer, as the Germans deliver their lines in English.) However, this version saw limited use during the film's initial release. It was used more extensively during the film's late 1960s re-release.