Character Name : Narrator (voice)

Original Name : Hervé Lacroix

Gender : Male

Character Name : Self (archive footage)

Original Name : Albert Einstein

Gender : Male

Character Name : Self (archive footage)

Original Name : Иосиф Сталин

Gender : Male

Character Name : Self (archive footage)

Original Name : Franklin D. Roosevelt

Gender : Male

Character Name : Self (archive footage)

Original Name : Adolf Hitler

Gender : Male

Character Name : Self - Son of Elizabeth Zarubina

Original Name : Pyotr Vasilyevich Zarubin

Gender : Male

Character Name : Self - Historian and Journalist

Original Name : Nikolai Bondarenko

Gender : Male

Character Name : Self - Historian and Journalist

Original Name : Alexandre Adler

Gender : Male

Character Name : Self - Author and Journalist

Original Name : Nikolai Dolgopolov

Gender : Male

Character Name : Self - Author and Journalist

Original Name : Patrick Pesnot

Gender : Male

Character Name : Self - Historian

Original Name : Alan B. Carr

Gender : Male

Character Name : Self (archive footage)

Original Name : Leó Szilárd

Gender : Male

Character Name : Self - Director of the Manhattan Project (archive footage)

Original Name : Leslie Groves

Gender : Male

Character Name : Self - Historian

Original Name : Jon Hunner

Gender : Male

Character Name : Self (archive footage)

Original Name : J. Robert Oppenheimer

Gender : Male

Character Name : Self - Theoretical Physicist and Atomic Spy (archive footage)

Original Name : Klaus Fuchs

Gender : Male

Character Name : Elizabeth Zarubina (voice)

Original Name : Claire Morin

Gender : Female