First rate flying drama set in the days after 1945 while Britain was still at the forefront of aeronautical research and Test Pilots were the modern successors to Sir Lancelot and Sir Gawain. I noticed one anachronism: after Nigel Patrick and Ann Todd fly home on Comet 1, they see a headline Geoffrey de Havilland Jr dies in attempt to break the Sound Barrier. But that event was in 1946, 3 years before Comet 1. The tension centres in a conflict between Ralph Richardson as the aircraft magnate and his daughter Ann Todd who holds him responsible for the deaths of first her brother (Denholm Elliott in an early role ) and her husband Nigel Patrick. Ralph Richardson's final scene in an astronomical observatory reminded me a bit of Raymond Massey's big speech at the end of Things To Come where he foresees Humanity conquering the Universe.