Based on the documentary story "Earth Brothers" by B. Kostyukovsky about the tragic fate of Boris Gainulin, the foreman of the Komsomol brigade at the construction of the Bratsk Hydroelectric Power Station.
| Actor | Role |
|---|---|
 Leonid NevedomskyBoris Gainulin | Boris Gainulin |
 Leonid LeonidovNot listed | Not listed |
 Anatoliy Pustokhinwriter | writer |
 Viktor KostetskyYuri Polovnikov | Yuri Polovnikov |
| VValeri Kuzinsurgeon | surgeon |
| NNina RodionovaLyubov Vasilievna | Lyubov Vasilievna |
| KKonstantin SmirnovVolodya | Volodya |
 Irina Komarovaepisode | episode |