The actual 1937 Art Deco apartment building used in the film (located at 1360 Montgomery St. in San Francisco) is still standing as of 2023. The apartment (No. 10) 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 unit has one bath, one bedroom and 861 square feet, and was last sold in 2016 for $1.5M.
The third of four films made by husband and wife Humphrey Bogart and Lauren Bacall. The other three are Acque del Sud (1944), Il grande sonno (1946), and L'isola di corallo (1948).
Warner Brothers studio head Jack L. Warner was not pleased to discover that the face of one of his biggest stars, Humphrey Bogart, is not seen for the first half of the movie. By the time Warner knew this, the film was too far along to be changed.
When Vincent Parry looks at Irene Jansen's scrapbook he sees a newspaper clipping about her father dying in prison, having been convicted of killing his wife, Irene's mother. The photo in the clipping is of Delmer Daves, the director of the film.