Sergei Desnitsky as Pirx

Vladimir Ivashov as Brown

Aleksandr Kaydanovskiy as Nowak

Tõnu Saar as Weber

Zbigniew Lesień as Calder

Bolesław Abart as Otis

Ferdynand Matysik as Unesco Director

Igor Przegrodzki as McCuirre

Faime Jurno as

Zygmunt Bielawski as Tech Companies Representative

Janusz Bylczyński as Judge

Adam Cieślak as

Edmund Fetting as Prosecutor

Józef Fryźlewicz as Defense Attorney

Marek Idziński as Court Member

Mieczysław Janowski as Mitchell

Z. Jurkowski as

Jerzy Kaliszewski as Android Creator

Eugeniusz Kujawski as Court Member

Ewa Lejczak as

Erwin Nowiaszak as United Atomic Laboratory CEO

Henryk Talar as Tom Novak (voice) (uncredited)