This was Richard Attenborough's final film as a director before his death on August 24, 2014 at the age of 90.
Construction workers of a demolition site in Belfast, where filming took place, were told to put the tearing down of the houses on hold and leave some standing for the shooting of this movie. The remainder of the houses were then blown up for the movie (for the effect of the bombs in World War II).
Stephen Amell's voice was later dubbed over after filming for his character, Teddy Gordon, had finished.
The movie Ethel Ann (Shirley MacLaine) is watching after her husband's funeral, and remembering Teddy, her first true love, is The Glenn Miller Story (1954) with James Stewart and June Allyson.
The B-17 used in this movie is the "Yankee Lady", owned and operated by the Yankee Air Museum of Ypsilanti, Michigan. This aircraft also appeared in Tora! Tora! Tora! (1970). The B-17 named "Sally B" also made an appearance in this movie.