A. Genin

Nahum Beychik, inventor

Василий Бокарев

Surkov, master

Kuzma Yastrebetsky

Lopatin

Aleksandr Duletov

Kuzma, Surkov's son

Николай Акимов

Factory secretary

Ye. Bondina

Lopatina

T. Sokolovskaya

Nadya

F. Tarasov

Worker

S. Stepanov

Worker

V. Snezhinskaya

(uncredited)

Viktor Arkasov

Worker (uncredited)

Иван Мутанов

Worker (uncredited)