Filming began in 1944, although the film was not shown in the cinema before 1946 (as "School for Danger"). Now It Can Be Told is a longer version, prepared for special release, with additional material from the documentary-style training sequences.
This film received its earliest documented telecasts in the USA in New York City and in Washington DC and in Baltimore Sunday 6 February 1949 on the Film Theater of the Air on WCBS (Channel 2). on WOIC (Channel 9), and on WMAR (Channel 2). It first aired in Salt Lake City Wednesday 22 June 1949 on KDYL (Channel 4), and in Cincinnati Tuesday 8 November 1949 on WKRC (Channel 11).