Although Franchot Tone is given top billing in this film, he does not appear for the first 45 minutes.
Contemporary sources indicate that Dave Coleman dubbed Elisha Cook Jr.'s erotic drum solo. This has been confirmed by Coleman's son. Despite this, some modern sources state that the drumming was provided by Buddy Rich, although Rich claimed to have been so busy in Hollywood at the time that he would have been unable to remember.
The elusive phantom lady being sought by Carol "Kansas" Richman, played by Ella Raines, is repeatedly referenced in the story as "Miss Terry" (i.e. "mystery").
After the film's release, Jacques Press and Eddie Cherkose sued Universal for $20,000 for not getting on-screen credit for their song "Chick-ee-Chick."
The automobile driven by Franchot Tone is a 1941 Cadillac Series 62 Convertible De Luxe Coupe.