This film harks back to the golden age of sci-fi. As of with most films of this genre during the 1950s, they offer a thinly disguised commentary on all the cold war issues and Soviet angst that was beginning to surface during this time.
The film tells the story of an alien coming to Earth to issue a warning that if mankind continues on its destructive path and takes it destruction beyond the realms of planet Earth, severe and absolute justice will be taken out on them.
This film is an utter triumph and ranks with all the great sci-fi films of all times. It is bright, intelligent, original and it's message is as relevant today as it was when the film was made. This movie is a must for any serious collector of sci-fi movies.