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