- During much of the shooting, director Michael Curtiz was seriously ill (he died of cancer shortly after the film's release). On the days when Curtiz was too ill to work, star 'John Wayne' took over direction of the film, and when it was completed he told the studio that he did not want credit as co-director and insisted that Curtiz' name alone appear as director.
- When John Wayne signs the hotel register as "McBain", one of the names in the register is William H. Clothier, the film's director of photography.
- Writer Tom Mankiewicz was a young production assistant on the film. One day, he was wearing a presidential campaign button for John F. Kennedy when star John Wayne asked him to remove it, saying they did not need any "communists" on the show. Mankiewicz removed it and kept his job.
Please support TCMDB by adding to this information.Click here to contribute