导演 Joseph Sargent

Gen. Leslie Groves 布莱恩·丹内利

J. Robert Oppenheimer 大卫·斯特雷泽恩

Leo Szilard Michael Tucker

James F. Byrnes 休姆·克罗宁

President Harry S. Truman 理查德·戴萨特

Gen. George Marshall 哈尔·霍尔布鲁克

Henry Stimson 巴纳德·休斯

Dr. Arthur Compton John McMartin

Franklin D. Roosevelt 大卫·奥格登·斯蒂尔斯

Kitty Oppenheimer Anne Twomey

劳伦斯·戴恩

Colonel Pash Ron Frazier

Edward Teller 欧勒克·克鲁帕

Bernie McInerney

Seth John Pielmeier

Dwight D. Eisenhower 肯·波格

Groves's Commanding Officer Gary Reineke

Alan Scarfe

Ralph A. Bard John Seitz

Enrico Fermi 托尼·夏尔赫布

Trude Weiss Ester Spitz

Colonel Nichols 罗恩·怀特

Eugen Wigner Stephan Balint

Albert Einstein Peter Boretski

Richard Feynman 帕特里克·布林

Hans Bethe 弗拉斯塔·弗拉纳

Samuel Goudsmit George Popovich

Klaus Fuchs Lorne Brass

Lord Rutherford Michael Sinelnikoff

Haakon Chevalier Graham Haley

Michael Polanyi Kliment Denchev

Ilse Polanyi Diana Fajrajsl

Colonel Lansdale Timothy Webber

Robert Wilson Harry Standjofski

Mrs. Wisnovsky Lia Sargent

Jack Wisnovsky David Gow

Shapp Michael Farrell

Mrs. Trowbridge Isabelle Mejias

Robert Serber Jonathan Wise

Ed Condon 乔治·R·罗伯逊

William 'Deke' Parsons Dee McCafferty

Captain DeSilva 汤姆·巴特勒

T. O. Jones Robert Morelli

James Tuck Jon Baggaley

Harry Gold David Bolt

Army Major 大卫·费里

Fleischmann Heinar Piller

Haagen Kistiakowski François Klanfer

George Kistiakowski Joel Miller

Kenneth Bainbridge 迈克尔·约翰·雷诺兹

William D. Leahy Ed McGibbon

Paul Tibbets Nicholas Kilbertus

Air Force Guard Joe Cazalet

Chemist 斯科特·汤姆森

Alfred MacCormack Bob Clout

Army General Roland Hewgill

John J. McCloy Stan Gibbons

Allan Dulles Terrence Labrosse

London Pedestrian Delise Alison

British Jr. Officer Alex Guard

British Sr. Officer Philip Spensley

Alexander Sachs Frederick Neumann

General Pa Watson Norris Domingue

Los Alamo Scientist (uncredited) Steve Barry

Scientist (uncredited) 亚瑟·霍尔登

Leo Szilard's Prime Scientist (uncredited) Romano Orzari