The story is a composite of cases from official FBI files.
Non-professional actors and real FBI agents appeared in the film.
Censorship in 1945 wouldn't allow the producers to have a man impersonating a woman, so they used a woman instead for the role of transvestite.
Film debuts for actors Edward (E.G.) Marshall, Vincent Gardenia, Rusty Lane and Paul Ford.
Shot on location in New York.
Additional cast: Lydia St. Clair (Johanna Schmedt), William Post, Jr. (Walker), Bruno Wick (Adolphe Lange), Harro Meller (Conrad Arnulf), Charles Wagenheim (Gus Huzmann), Alfred Linder (Adolph Klaen), Rusty Lane (Admiral).
Additional credits: Lewis Creber (art director), William Sittel (set decorator), William Newberry (casting director), Henry Weinberger (assistant director).
Academy Awards Best Motion Picture Story 1945 Charles G. Booth Screenwriter, Novelist, mid '30s-late '40s, JOHNNY ANGEL