- Country: USA
- Genres: Crime, Drama, Mystery
- Release: 1944-10-21
- Director: Budd Boetticher
- Writers: Jack Boyle , Paul Yawitz
- Language: English
- Stars: Chester Morris , Janis Carter , William Wright , Richard Lane , George E. Stone (I) (1903–1967) , Robert B. Williams , Mark Roberts , Ed Allen , Kenneth Brown , Early Cantrell
- Runtime: 61 min
- Awards: N/A
- AKA: One Mysterious Night , Boston Blackie's Appointment with Death (United States of America) , Una noche misteriosa (Mexico) , O Diamante Roubado (Portugal, Portuguese Republic) , One Mysterious Night (United States of America) , Behind Closed Doors (United Kingdom) , O Caso do Diamante Azul (Brazil)
- Plot: Blackie is enlisted by the police to help recover the Blue Star of the Nile diamond, stolen from a war relief exhibit.
- IMDB:tt0037153
One Mysterious Night Cast · · · ALL
Budd Boetticher
Director
Chester Morris
Horatio 'Boston Blackie' Black
Janis Carter
Dorothy Anderson
William Wright
Paul Martens
Richard Lane
Inspector Farraday
George E. Stone
(I)
(1903–1967)
The Runt
Robert B. Williams
Matt Healy
Mark Roberts
George Daley
Dorothy Malone
Eileen Daley (Uncredited)
Joseph Crehan
Jumbo Madigan (Uncredited)
Ben Taggart
Traffic Cop (Uncredited)
Minerva Urecal
Miss Wilkinson (Uncredited)
Constance Purdy
Woman in Daley's Office (Uncredited)
Kenneth Brown
Boy (Uncredited)
Early Cantrell
Margaret Dean (Uncredited)
Lew Davis
Exhibit Attendee (Uncredited)
Edythe Elliott
Mother (Uncredited)
Jack Gardner
Frank (Uncredited)
Fred Graff
Reporter (Uncredited)
Harrison Greene
Arthur Manleder (Uncredited)
Fred Howard
Reporter (Uncredited)
Dick Jensen
Policeman (Uncredited)
Henry Jordan
Reporter (Uncredited)
Edward Keane
Police Commissioner Howard (Uncredited)
Lyle Latell
Detective Sergeant Matthews (Uncredited)
Billy Lenhart
Boy (Uncredited)