"The Screen Guild Theater" broadcast a 30 minute radio adaptation of the movie on June 10, 1946 with Signe Hasso, Lloyd Nolan and William Lundigan reprising their film roles.
Vincent Gardenia's first film.
Lloyd Nolan reprised his role of FBI Agent George A. Briggs in _Street With No Name, The (1948)_.
First film of Paul Ford.
First film of E.G. Marshall.
Many of the bit roles in this film were played by real FBI agents, and this was their only film.
The "House on 92nd Street" used in the film was actually located on 93rd street. The building has since been demolished.
The film is loosely based on the case of Duquesne Spy Ring headed by Frederick Joubert Duquesne and the work of real life double agent William G. Sebold.
The man who is killed by the car near the beginning of the film is based on a real life incident. He was identified as Julio Lopez Lido but was in actuality Capt. Ulrich von der Osten, a Nazi army officer in the Abwehr. He was hit by a car on March 18, 1941 and his body went unclaimed for a time. The man who ran from the scene was actually Kurt Frederick Ludwig, known as Joseph K, a German agent who was eventually caught and sentenced to Alcatraz Island. He was deported in 1953. The cab driver who hit Lido was a man named Sam Lichtman.
The movie deals with the theft by German spies of the fictional "Process 97," a secret formula which, the narrator tells us, "was crucial to the development of the atomic bomb." The movie was released on September 10, 1945, only a month after the atomic bombs had been dropped on Japan, and barely a week after Japan's formal surrender. While making the film, the actors and director Henry Hathaway did not know that the atomic bomb existed, or that it would be incorporated as a story element in the movie. (None of the actors in the film mentions the atomic bomb.) However, co-director/producer Louis De Rochemont (who produced the "March of Time" newsreel films) and narrator Reed Hadley were both involved in producing government films on the development of the atomic bomb. (Hadley was present at the final test of the bomb in Los Alamos, New Mexico, in July, 1945.) After the bomb was dropped on Hiroshima, Hadley and screenwriter John Monks Jr. hastily wrote some additional voice-over narration linking "Process 97" to the atomic bomb, and Rochemont inserted it into the picture in time for the film's quick release.
The original title of the film was, "Now It Can Be Told".