As Karl Malden's police sergeant character leaves his desk, he calls for a colleague named "Sekulovich" to toss him his hat. "Sekulovich", in fact, is Malden's birth name.
The original script was written in 1944 and sat on the shelf at Warner Brothers until 1963 when at long last it was finally produced.
For Bette Davis, this film was a reunion not only with Paul Henreid but also with George Chandler; they were both contract players at Warners in the 1930s. This was their first picture together since "Front Page Woman" 29 years earlier.
The jazz combo in Edie's Bar was composed of female electronic organist Perry Blackwell and drummer Kenny Dennis, both noted musicians, but uncredited in the film. Blackwell can be seen as a lounge singer at the piano in the 1959 romantic comedy "Pillow Talk", starring Doris Day and Rock Hudson. In that film, she, Doris Day, and Rock Hudson do a comical sing-along version of "Roly Poly."