Николай Боголюбов
— Ognev, chief of Sovier air defence
Sofya Sokolova
— Galina, Ognev's sister
Борис Ливанов
— Karl Runge, engineer
Николай Подгорный
— Professor Runge
Лев Фенин
— General Vahr
V. Lavrentiev
— Colonel Massalskiy
Александр Антонов
— Chief of aviation
Георгий Бобынин
— Staff captain Blagonadyozhnyh
K. Chugunov
— Master Akim Ivanovich