Argentina Brunetti plays Gilbert Roland's mother even though she is nearly 2 years younger than him.
French translation of the title - "Rendez-vous avec une Ombre" - is the same title of another movie, also produced by Universal, directed by Richard Carlson, and released the same year: "Appointment with a Shadow", which was the UK and South African theatrical title of "The Midnight Story".
The UK and South African release title of "The Midnight Story" is "Appointment with a Shadow".
The Italian name Malatesta translates to "bad head" in English.