Director
Aleksandr Dubrovskiy
DIRECTOR
Writer
WRITER
Ureklyan Gabriel
Vera Inber
Stars (in credits order)
Boris Azarov
Zaretsky, laboratory assistant
Khakim Davletbekov
Hakim, poor man
Vladimir Gardin
Shakhrov, professor
Sergey Golubev
Bantikov, telegrapher
Nikolay Kutuzov
Kuznetsov, stationmaster
Yevgeniya Pyryalova
Zhenya Maltseva
M. Tulupov
Yaroshevsky, professor
