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