演职人员
Ivanov, factory worker and inventor
Николай Симонов
Dukalskiy, engineer from Moscow
Пётр Кузнецов
Nastya, Ivanov's fiancée
Наталья Разумова
Kraft, technical office representative
Сергей Троицкий
Babkin, jewelry shop owner
Petr Shidlovsky
Important man
Александр Ржешевский