Early in the film a courier rides a night bus from Los Angeles to Monterey. Although the coach arrives at dawn, a long shot of the receding bus before that is in full daylight.
There was a St. George Hotel in Los Angeles, where Susan Lakely tells P.I. Francis Hogan that is where her missing fiancé lives, but she states that it is on La Cienega Boulevard. The actual address was 115 E. 3rd Street. A flash fire on the night of 25 March 1952 killed at least six patrons.