Cast
- Loengrin Minaev as Arkadiy Zubov
- Pyotr Grokhovskiy as Genya
- Boris Runge as Lyova Prokushev
- Lev Mirsky as Vitya Surikov
- Dagmara Deringer as Lidochka
- Yekaterina Derevshchikova as Katya
- K. Gavrikov as Classmate
- Grigoriy Aronov as Aronov, classmate
- Anatoliy Ignatyev as Seryozha
- Vera Altayskaya as Marusya Ivanova, pioneer leader