I saw this movie in 1955, when I was 35 and not so long after my time in the Air Force in WWII, so the RAF flight in the Dakota (same as our USAF C47 and the civilian DC3) resonated for me. But it was really the extraordinary level of suspense that made it so memorable. It starts with a dream of a Dakota lost in a storm and crashing onto a rocky beach. Crucial is the exact number on board. As the real trip progresses in stages, passengers get on and off. Just as it seems the fatal number has been circumvented, something happens to re-institute it. The way this was done was so believable and artfully handled. I particularly remember an episode with someone pointing out that telling the pilot the dream is not such a good idea; after all, he needs his skills to fly the plane safely, and if he takes the dream seriously and it makes him nervous...I have used this idea the rest of my life when directing hundreds of people. It touches on a profound bit of philosophy: when is deception justified? A great movie: if you get the chance, don't miss it.