- Yuri Bychkov
- Kolya Novikov
- Yuriy Tolubeev
- Grigori Novikov
- Olga Avericheva
- Kolya's Mother
- Nikolai Simonov
- Ilya Golovin
- Vladimir Lukin
- Teacher Aleksey Petrovich
- Rita Klokova
- Lida
- Vladimir Repkin
- Yasha Mokin
- Andrei Apsolon
- Pioneer Leader
- Vasiliy Merkurev
- Fellow Traveler
