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