When Vincent reads the newspaper clipping about Irene's father, the accompanying photograph of her father is that of director/screenwriter Delmer Daves.
Franz Waxman's main title music for this movie is exactly the same as that used in To Have and Have Not (1944), for which he was uncredited.
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.
The actual Art Deco apartment used in the film (located at 1360 Montgomery St in San Francisco) had to be torn down in the mid 1990's after a landslide washed away most of the foundation soil from the hill-side building, leaving the beautiful home dangling dangerously over the edge. However, when the city demolition team showed up to tear the building down, they found it so well built that, even with more the half the structure hanging out over space, they were unable to simply pull it down. They eventually resorted to cutting the home to pieces with large chainsaws and carrying away the scrap.
When Bogie 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.