The Beginning or the End

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

Edwin B. Willis Set Decoration Cedric Gibbons Art Direction Norman Taurog Director