Générique complet
Le Grand Secret
Robert Taylor
Lt. Col Paul W. Tibbets
Eleanor Parker
Lucey Tibbets
James Whitmore
Maj. William M. Uanna
Larry Keating
Maj. Gen. Vernon C. Brent
Larry Gates
Capt. William Parsons
Marilyn Erskine
Marge Bratton
Stephen Dunne
Maj. Harry Bratton
Robert Burton
Gen. Samuel E. Roberts
Hayden Rorke
Dr. Ramsey
Lawrence Dobkin
Dr. Van Dyke
Jack Raine
Dr. Fiske
Jonathan Cott
Capt. Dutch van Kirk
Jeff Richards
Maj. Thomas Ferebee
John McKee
Sgt. Wyatt E. Duzenbury
Dick Simmons
Capt. Robert A. Lewis (Co-Pilot, Enola Gay)
Jim Backus
Gen. Curtis E. LeMay
Bess Flowers
Wife at Washington D.C. Airport
Lee MacGregor
Gen. Robert's Aide
RS
Robert Stevenson
Military Officer (uncredited)
