Calificación
Reparto

Борис Ливанов
Pyotr Vinogradov, inventor

Valentin Tsishevskiy
Senya Kaufman

Константин Градополов
Kotya Okhotnikov

Galina Pashkova
Valya, music student

Nadezhda Ardi
Tonya, architecture student

Иван Переверзев
Physical education instructor (uncredited)

Татьяна Барышева
Senya's mother (uncredited)

Всеволод Санаев
Red army sailor (uncredited)

Галина Степанова
Young girl (uncredited)

Сергей Антимонов
Professor (uncredited)

Yeva Milyutina
Spectator at the concert (uncredited)

M. Klyuchareva
Middle aged woman (uncredited)