MacLain as a captured POW has "KG" written on his back. This is a German acronym for the word kriegsgefangenen, meaning war prisoner.
The story line about the registration of prostitutes is absolutely authentic.
The film's aloof, uninvolved feel is explained by the fact that its two lead characters do not connect in earnest until one hour into a movie that runs only thirty-five minutes longer.
Major MacLain's uniform shows that he is an infantry officer, assigned to SHAEF. During the war, he served in the 9th Infantry Division, spent 2 1/2 years in overseas service, and was awarded the Combat Infantryman's Badge, the Bronze Star for valor, and the Purple Heart for being wounded in action.
Dana Wynter was born in Berlin, though she was raised in England.