Based on the book, The Narrow Margin, by Derek Wood & Derek Dempster. The story of the aerial combat battle of WWII, in which the Royal Air Force held off the German Luftwaffe. Originally released as a motion picture in 1969, starring Harry Andrews, Michael Caine, Trevor Howard, Curt Jurgens, Ian McShane, Kenneth More, Laurence Olivier, Nigel Patrick, Christopher Plummer.