as Nikolai

as Vedmed

as физик Евгений Александрович Крымов

as Gleb Petrovich

as 'Chap'

as Vasya Gordiyenko

as Nikolai Schelokov

as Sergei

as Stepan Yakovlevich Shokhin (direktor shkoly)

as Иван Кравчук

as Zernov

as Белов

as Kosov

as Dyomin

as Seryozha Davydov

as Lyosha Starostin

as student at a meeting (uncredited)

as Golyba