The characters of Robert Nelson and Elliott Jennings were based on real-life traitors Robert Noble and Ellis Jones, who worked together in an organization called "Friends of Progress" and staged a mock impeachment trial of President Franklin D. Roosevelt that was still going on when Pearl Harbor was attacked. Ultimately both men were arrested and convicted under a California state law calling for the registration of subversive organizations.
In the film, the recorded instructions to Axis espionage agents were concealed on a record called "To a Water Lily", billed as a "piano solo by Eddie Kay". Edward J. Kay (nicknamed Eddie) was the musical director on this film.
The earliest documented telecast of this film in the New York City area occurred Monday 19 June 1944 on pioneer television station WNBT (Channel 1).