Trailer
Cast
Beverly Tyler
Anne Cochran
Brian Donlevy
Maj. Gen. Leslie R. Groves
Audrey Totter
Jean O'Leary
Joseph Calleia
Dr. Enrico Fermi
Richard Haydn
Dr. Chisholm
Tom Drake
Matt Cochran
Hume Cronyn
Dr. J. Robert Oppenheimer
Victor Francen
Dr. Marre
Henry O'Neill
Gen. Thomas F. Farrell
Bobby Jordan
Radioman on Tinian Receiving A-Bomb Message
Hurd Hatfield
Dr. John Wyatt
Godfrey Tearle
President Franklin D. Roosevelt
Jonathan Hale
Dr. Vannevar Bush
John Litel
K.T. Keller
Warner Anderson
Capt. William S. Parsons
Ellen Ross
Waitress
Robert Walker
Col. Jeff Nixon