Test pilota Pirxa is a joint Polish-Soviet film from 1978. It is based on the story
The Inquest by Stanisław Lem from his short story collection More Tales of Pirx the Pilot.
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 usefulness, 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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