The entire movie plot unfolds from lead Robert Montgomery's point of view, thus creating a rarity in film: the principal character is only seen on-screen as a reflection in mirrors and windows, and as the narrator speaking directly to the audience.
The first-person camera technique used by Robert Montgomery is known as "subjective camera," and had not before been employed in this manner beyond the first few minutes of a film (Dr. Jekyll and Mr. Hyde, in 1931, by pioneering director Rouben Mamoulian.) Raymond Chander didn't think the technique would work. After hearing that it was going to be utilized from co-writer Steve Fisher, the author called the studio the next day to complain. It apparently was a contributing factor to Chandler's refusal to take a film credit.
Lloyd Nolan who plays Lt. DeGarmot in this film previously played the lead in "Time To Kill" based on Raymond Chandler's Philip Marlowe novel "The High Window", which was released as part of the Michael Shayne series of detective films.
This film had its first television showings in Los Angeles Thursday 6 December 1956 on KTTV (Channel 11), in New York City Saturday 16 February 1957 on WCBS (Channel 2), in Philadelphia Friday 1 March 1957 on WFIL (Channel 6) and in San Francisco 15 February 1958 on KGO (Channel 7).
The pistol at the end of the opening credits is a Colt Model 1908 "Vest Pocket" .25 caliber six-shot semi-automatic. It can be seen throughout the film in the hands of Marlow, Kane, Fallbrook, DeGarmot, and Adrianne Fromsett.