The actual Art Deco apartment building used in the film (located at 1360 Montgomery St in San Francisco) is still standing as of December, 2008. The actual apartment is marked by a cardboard cut-out of Humphrey Bogart, which can be seen from the street. The site is visited frequently by fans of vintage film noir.
The first film in which Humphrey Bogart wore a full hairpiece.
There is an 8x10 photo shown in the film of Humphrey Bogart's character before his face surgery. The actor's face in the photo is of character actor Frank Wilcox.
Warner Bros. paid $25,000 for the rights to the David Goodis novel, which was serialized in The Saturday Evening Post from 20 July-September 7, 1946.
When Humphrey Bogart is riding in the car with Clifton Young during his escape, the voice on the radio is supplied by Dane Clark, another Warner's player.
When Vincent reads the newspaper clipping about Irene's father, the accompanying photograph of her father is that of director/screenwriter Delmer Daves.