A group of scientists is sent to the planet Arkanar to help the local civilization, which is in the Medieval phase of its own history, to find the right path to progress. Their task is a difficult one: they cannot interfere violently and in no case can they kill. The scientist Rumata tries to save the local intellectuals from their punishment and cannot avoid taking a position.
Leonid Yarmolnik
Yuriy Tsurilo
Natalya Moteva
Aleksandr Chutko
Aleksandr Ilin
Evgeniy Gerchakov
Pyotr Merkuryev
Juris Laucinsh
Vytautas Paukste
Konstantin Vorobyov
Aleksandr Cherednik
Valentin Golubenko
Konstantin Bykov
Yuriy Dumchev
Aleksandr Karpukhov
Aleksandr Ronis
Anvar Libabov
Aleksandr Levit
Vladimir Rozygraev
Dmitri Karpov
Andrey Obarukhin
Ramis Ibragimov
Evgeniy Vazhenin
Valery Velichko
Mikhail Guro
Evgeny Mundum
Yuriy Nifontov
Anna Ovsyannikova
Aleksandr Orlovskiy
Marina Rokina
Vadim Smirnov
Vitaliy Isakov
Yuriy Ashikhmin
Dmitriy Vladimirov
Zura Kipshidze
Aleksandr Yudin
Vasiliy Domrachyov
Evgeniy Levitskiy
Fyodor Lavrov
Lev Eliseev
Victor Pomortcev
Mikhail Silantyev
Pavel Romanov
Aleksandr Seleznyov
Vladimir Yumatov
Konstantin Smirnov
Dmitriy Solovyov
Gennadi Chetverikov