The Mystery of Kara-Tau
Professor Shakhrov
Kuznetsov
Professor Yaroshevskiy
Khakim
Zhenya Maltseva
Zaretskiy
Young Kazakh girl
Young kazakh woman
Telegraph operator
Guryev, student (uncredited)
Factory worker (uncredited)
Scientist (uncredited)
Komsomol member (uncredited)
