IMDb Page
  • Average Age of Cast at Release:
  • Cast Members Alive:
  • Gender Split (F:M):
  • Percent of Cast with Demo Info:
Profile Pic Name Character Birthday Deathday Age at Release
Brian Donlevy Maj. Gen. Leslie R. Groves
Robert Walker Col. Jeff Nixon
Tom Drake Matt Cochran
Beverly Tyler Anne Cochran
Hume Cronyn Dr. J. Robert Oppenheimer
Audrey Totter Jean O'Leary
Hurd Hatfield Dr. John Wyatt
Joseph Calleia Dr. Enrico Fermi
Godfrey Tearle President Franklin D. Roosevelt
Victor Francen Dr. Marre
Richard Haydn Dr. Chisholm
Jonathan Hale Dr. Vannevar Bush
John Litel K.T. Keller
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
Jerry Schumacher Nazi Officer