演职人员
导演
诺曼·雷·陶罗格
Maj. Gen. Leslie R. Groves
Brian Donlevy
Col. Jeff Nixon
Robert Walker
Matt Cochran
Tom Drake
Anne Cochran
Beverly Tyler
Dr. J. Robert Oppenheimer
休姆·克罗宁
Jean O'Leary
Audrey Totter
Dr. John Wyatt
Hurd Hatfield
Dr. Enrico Fermi
约瑟夫·卡莱亚
President Franklin D. Roosevelt
Godfrey Tearle
Dr. Marre
Victor Francen
Dr. Chisholm
理查德·海顿
Dr. Vannevar Bush
Jonathan Hale
K.T. Keller
John Litel
Gen. Thomas F. Farrell
Henry O'Neill
Capt. William S. Parsons
Warner Anderson
Waitress
Ellen Ross
Radioman on Tinian Receiving A-Bomb Message
Bobby Jordan
Nazi Officer
Jerry Schumacher