An international group of astronauts sent to investigate a mysterious signal from Jupiter discover a city full of robots. Beautiful sets and haunting matte paintings make this movie interesting moment to moment, but bad dubbing and carelessly cut-in scenes with American actors mean the movie doesn't really make much sense as a whole. Viewers with a serious interest will seek out Mikołaj w Kosmosie (1960), the Polish film that was the source of the best parts of this one, and watch that instead.
