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Vladimir Gardin
as Professor Shakhrov
Nikolay Kutuzov
as Kuznetsov
M. Tulupov
as Professor Yaroshevskiy
Khakim Davletbekov
as Khakim
Yevgeniya Pyryalova
as Zhenya Maltseva
Boris Azarov
as Zaretskiy
Kheyhana Tastakhova
as Young kazakh woman
Sergey Golubev
as Telegraph operator
Viktor Zakharov
as Guryev, student (uncredited)
Nikolai Michurin
as Factory worker (uncredited)
Vladimir Romashkov
as Scientist (uncredited)
Vladimir Stukachenko
Vladimir Chobur
as Komsomol member (uncredited)
Aleksandr Dubrovskiy
Director
Writer
Vera Inber
Gabriel Ureklyan
Georgy Blum
Director of Photography
Vasily Komardenkov
Production Design
