The Beginning or the End (1947)

Brian Donlevy

as Maj. Gen. Leslie R. Groves

Robert Walker

as Col. Jeff Nixon

Tom Drake

as Matt Cochran

Beverly Tyler

as Anne Cochran

Hume Cronyn

as Dr. J. Robert Oppenheimer

Audrey Totter

as Jean O'Leary

Hurd Hatfield

as Dr. John Wyatt

Joseph Calleia

as Dr. Enrico Fermi

Godfrey Tearle

as President Franklin D. Roosevelt

Victor Francen

as Dr. Marre

Richard Haydn

as Dr. Chisholm

Jonathan Hale

as Dr. Vannevar Bush

John Litel

as K.T. Keller

Henry O'Neill

as Gen. Thomas F. Farrell

Warner Anderson

as Capt. William S. Parsons

Ellen Ross

as Waitress

Bobby Jordan

as Radioman on Tinian Receiving A-Bomb Message

J

Jerry Schumacher

as Nazi Officer