Владимир Гардин
Professor Shakhrov
Николай Кутузов
Kuznetsov
M. Tulupov
Professor Yaroshevskiy
Khakim Davletbekov
Khakim
Евгения Пырялова
Zhenya Maltseva
Борис Азаров
Zaretskiy
Kheyhana Tastakhova
Young kazakh woman
Сергей Голубев
Telegraph operator
V. Zakharov
Guryev, student (uncredited)
Николай Мичурин
Factory worker (uncredited)
Владимир Ромашков
Scientist (uncredited)
Vladimir Stukachenko
Factory worker (uncredited)
Vladimir Chobur
Komsomol member (uncredited)
Александр Дубровский
Тайна Кара-Тау
Released
Bande-annonce