as Professor Shakhrov
as Kuznetsov
as Professor Yaroshevskiy
as Khakim
as Zhenya Maltseva
as Zaretskiy
as Young kazakh woman
as Telegraph operator
as Guryev, student (uncredited)
as Factory worker (uncredited)
as Scientist (uncredited)
as Factory worker (uncredited)
as Komsomol member (uncredited)
