保罗·费斯

Paul Frees

饰：Narrator

Leslie Groves

Leslie Groves

饰：Himself (archive footage)

Robert Krohn

饰：Himself

约瑟夫·雷芒德·麦卡锡

Joseph McCarthy

饰：Himself (archive footage)

罗伯特·奥本海默

J. Robert Oppenheimer

饰：Himself (archive footage)

Robert Serber

饰：Himself

哈里·S·杜鲁门

Harry S. Truman

饰：Himself (archive footage)

Hans Bethe

Hans Bethe

饰：Himself

Holm Bursom

Holm Bursom

饰：Himself

Haakon Chevalier

Haakon Chevalier

饰：Himself

Stirling Colgate

Stirling Colgate

饰：Himself

Freeman Dyson

饰：Himself

Susan Evans

Susan Evans

饰：Herself

Francis Fergusson

Francis Fergusson

饰：Himself

Elizabeth Ingram

Elizabeth Ingram

饰：Herself

Dave MacDonald

Dave MacDonald

饰：Himself

Dorothy McKibben

Dorothy McKibben

饰：Herself

Robert Porton

Robert Porton

饰：Himself

Isidor Isaac Rabi

Isidor Isaac Rabi

饰：Himself (as I. I. Rabi)

Francoise Ulam

Francoise Ulam

饰：Herself

Stanislaw Ulam

Stanislaw Ulam

饰：Himself (as Stan Ulam)

Jane Wilson

Jane Wilson

饰：Herself

Robert Wilson

Robert Wilson

饰：Himself

乔恩·埃尔斯

Jon Else

饰：Interviewer

保罗·费斯

Paul Frees

饰：自己