Cast
- Ivan Pereverzev as Vasiliy Dokuchaev
- Nadezhda Cherednichenko as Anna Egorovna, Dokuchaev's wife
- Yuri Puzyryov as Nikolay Sibirtsev
- Yevgeni Lebedev as Yegor
- Viktor Chekmaryov as Aleksey Yermolov
- Serhii Dvoretskyi as Adamov
- Aleksandr Mazayev as Minister
- Vladislav Strzhelchik as Vitaliy Andreyevich, minister's secretary
- Vladimir Volchik as Scientist
- Rimma Manukovskaya