This 1941 production is an excellent reconstruction of a typical RAF bombing mission and includes a lot of aerial footage of the attack itself. The "star" is a Wellington twin-engined medium bomber called F for Freddy, part of No. 149 Squadron flying from Mildenhall. The 'actors' are its crew-ordinary serving aircrew of the time. The story begins with the reconnaissance flight, the study of the target (an oil refinery) and a plan of attack which required F for Freddy to go in first. Based on a superb geodesic design concept devised by the genius, Barnes Wallis, the "Wally" could take an astounding amount of punishment from enemy fighters and ack-ack and yet still limp home.