Pirx, an experienced pilot, is hired to go on a top-secret mission to evaluate some 'nonlinears' (an experimental model of android) for use as crewmembers on future space flights. Pirx and this intriguing crew are sent out to launch two satellites into the rings of Saturn, but he is determined to find out and identify a hostile unhuman coworker among them.
Sergei Desnitsky
Pirx
Vladimir Ivashov
Brown
Aleksandr Kaydanovskiy
Nowak
Tõnu Saar
Weber
Zbigniew Lesień
Calder
Bolesław Abart
Otis
Ferdynand Matysik
Unesco Director
Igor Przegrodzki
McCuirre
