I always wondered how they managed to pick the name of the main character in this movie (Dr. Russell A. Marvin). That is my name, and it is very uncommon. When I saw the credits in the IMDB, I realized the answer. The inspiration for this movie was a book by Donald E. Keyhoe, who was consulted on this film. In 1956, Keyhoe started an organization called NICAP (National Investigations Committee on Aerial Phenomena). In 1956, I was a real flying saucer enthusiast, and was one of the very first people to join NICAP. I believe that they picked my name off of Keyhoe's membership list. I was 14 years old at the time. Anyway, it's a good flick with some great special effects (done the old fashioned way) by the legendary Ray Harryhausen.