Sergey Bondarchuk

Character: Igor Kurchatov

Georgi Zhzhyonov

Character: Vitaliy Zubavin

Nikolai Volkov St.

Character: Abram Ioffe

Irina Skobtseva

Character: Marina Kurchatova

Nikolay Burlyaev

Character: Fedya

Alla Pokrovskaya

Character: Tanya

Yakov Tripolsky

Character: Stalin

Mikhail Ulyanov

Character: Zhukov

Sergei Yursky

Character: Robert Oppenheimer

Oleg Basilashvili

Character: Boris Pash

Alla Demidova

Character: Jane

Innokentiy Smoktunovskiy

Character: Roosevelt

Fritz Diez

Character: Hitler

Aleksandr Ivanov

Character: