| Cast overview, first billed only: |
 | Lyudmila Gurchenko | - | Natalya Fyodorovna Zimina |
 | Pyotr Velyaminov | - | Mikhail Erastovich Osmolovskiy |
 | Juozas Budraitis | - | Vladimir Alekseyevich Rusakov |
 | Sergei Velyaminov | - | Young Osmolovskiy |
| Martynas Budraitis | - | Young Rusakov |
| Vyacheslav Solodilov | - | Stepan Antonovich Mazur |
 | Leonid Kulagin | - | Boris Sharich |
 | Nikolai Kryukov | - | Ivan Ivanovich Rozhnov |
 | Aleksey Zaytsev | - | Shmakin |
 | Gregory Hlady | - | Guban |
 | Rostislav Yankovskiy | - | Colonel Steblin |
| Karen Dzhangiryan | - | Professor Obelyants |
| Svetlana Panfilova | - | Vera Mazur (as S. Panfilova) |
 | Valentin Bukin | - | Zhurbenko |
 | Mikhail Petrov | - | Nikodim Gurtov |
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