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Сергей Бондарчук as Igor Kurchatov |
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Георгий Жжёнов as Vitaliy Zubavin |
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Николай Волков as Abram Ioffe |
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Ирина Скобцева as Marina Kurchatova |
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Николай Бурляев as Fedya |
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Алла Покровская as Tanya |
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Яков Трипольский as Stalin |
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Михаил Ульянов as Zhukov |
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Сергей Юрский as Robert Oppenheimer |
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Олег Басилашвили as Boris Pash |
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Алла Демидова as Jane |
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Иннокентий Смоктуновский as Roosevelt |
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Fritz Diez as Hitler |
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Александр Иванов as |
| Directing | Игорь Таланкин | Director |
| Writing | Даниил Гранин | Novel |
| Writing | Даниил Гранин | Writer |
| Writing | Игорь Таланкин | Writer |
| Camera | Наум Ардашников | Director of Photography |
| Art | Татьяна Лапшина | Production Design |
| Art | Александр Мягков | Production Design |
| Sound | Альфред Шнитке | Original Music Composer |
| Sound | Григорий Коренблюм | Sound Director |
| Sound | Семён Литвинов | Sound Director |
| Sound | Валентин Бобровский | Sound Director |
| Sound | Юрий Николаевский | Conductor |
| Directing | Leonid Chertok | Assistant Director |
| Camera | Григорий Шпаклер | Camera Operator |
| Camera | Владимир Горшков | Camera Operator |
| Costume & Make-Up | Ольга Кручинина | Costume Design |
| Costume & Make-Up | Михаил Чикирев | Makeup & Hair |
| Editing | Зоя Верёвкина | Editor |
| Visual Effects | Борис Травкин | VFX Director of Photography |
| Visual Effects | Фёдор Красный | VFX Supervisor |
| Directing | A. Panov | Second Assistant Director |
| Art | V. Semyonov | Set Decoration |
| Editing | Любовь Филькина | Assistant Editor |
| Lighting | Yu. Uliyanov | Lighting Artist |
| Writing | Леонид Нехорошев | Script Editor |
| Production | Ефим Голынский | Executive Producer |
| Directing | Василий Бадаев | First Assistant Director |
