Wissenswertes

Screenwriters Frank Launder and Sidney Gilliat had optioned the original novel several years before this movie was made, but dropped the idea because of problems with the story. They were persuaded to resume work on the project when they made an arrangement with Columbia Pictures, but were never very satisfied with the result. Gilliat disliked the original title, Fortune Is a Woman, but thought the American title, She Played with Fire, was worse. After the movie was completed, Writer Val Valentine came up with a title they all liked - Red Sky at Night - but by then it was too late to change things.

The father of the Geoffrey Keen character is played by the actor's actual father, Malcolm Keen.

When Oliver shows Mr. Croft Sarah's picture, opposite the photo is a 1956 calendar. This film was produced on September to November of 1956.

The airplane depicted as flying Oliver and Sarah to France is a British European Airways Vickers Viscount 701, registration G-ANHA, built in 1953. It was sold to Brazil's VASP airlines in 1962 and registered as PP-SRP. Withdrawn from service and put into storage in 1969, it was eventually scrapped sometime in the 1980s.

There's a reference to an "old family" fighting in "every war since the time of Agincourt." American subtitles mistook it for "Ashing Corps," but it is a reference to the famous English victory over France in the Hundred Years' War.