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Vladimir Gardin
Professor Shakhrov
Nikolay Kutuzov
Kuznetsov
M. Tulupov
Professor Yaroshevskiy
Khakim Davletbekov
Khakim
Yevgeniya Pyryalova
Zhenya Maltseva
Boris Azarov
Zaretskiy
Kheyhana Tastakhova
Young kazakh woman
Sergey Golubev
Telegraph operator
Viktor Zakharov
Guryev, student (uncredited)
Nikolai Michurin
Factory worker (uncredited)
Vladimir Romashkov
Scientist (uncredited)
Vladimir Stukachenko
