The movie is about "finite nonlinears," robots that closely resemble human beings but are even more perfect than humans. They are intended to eventually replace human beings in space flights. Somewhat apprehensive about their usefullness, the United Nations sets up a space flight to determine their reactions to the human beings who also make up the crew. Pirx is selected as a commander of the flight, although the identity of the robots is not revealed to him...
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Did You Know?
In the film Commander Pirx asked Harry Brown if he believed human beings possessed conscience. In the book the actual question was if Harry Brown believed in God. It was altered because of the communist censorship. See more
The rings of Saturn are actually only a few meters thick and are not solid. The spaceship would pass through the Cassini division in less than a second, not (as in the film) take minutes through some kind of ice gorge. This error does not occur in Lem story the film is based on. See more