In the scene at the 1937 Academy Awards that opens the film, director Edward Dmytryk is pointed out in hushed tones by event attendees as if he were a major director. At that time, he had directed a single, low-budget and very minor movie.
Closing captions tell us that Herbert Biberman never worked again in films after being blacklisted, but near the end of his life, he did make one last film, "Slaves" (1969).
The film depicts many 50-star United States flags (should be 48 in 1947).
Near the beginning of the movie, a scene set in the 1937 Academy Awards (taken from archive footage) shows a billboard reading "Edward G. Robinson in Scarlet Street (1945).
Many signs are obviously European; the bus which transports Biberman to his prison sentence is a Mercedes-Benz bus made in the late 1950s, which no U.S. government agency would have used on United States territory, and which bears markings and lettering that no U.S. government agency would have used.
The black Chevy truck used in the later part of the movie was circa 1964.