Kim Darby (Lucy Tibbets)
James Shigeta (Field Marshal Abehata)
Michael Tucci (Capt. Claude Eatherly)
Richard Venture (Alexander Sachs)
Robert Walden (J. Robert Oppenheimer)
Than Wyenn (Gen. Curtis Le May)
Marion Kodama Yue (Aya)
Billy Crystal (Lt. Jake Beser)
Phillip Pine
Henry Wilcoxon (Secretary of War Stimson)
Stephen Roberts (Franklin D. Roosevelt)
James Saito (Lt. Tatsuo Yamato)
Robert Pine (Capt. William "Deke" Parsons)
Patrick Duffy (Col. Paul Tibbets)
Peter Fox
Gary Frank (Maj. Tom Ferebee)
John Fujioka (Gen. Nagai)
Gregory Harrison (Capt. Bob Lewis)
Richard Herd (Gen. Groves)
Stephen Macht (Maj. William "Bud" Uanna)
Bill Morey (Gen. George Marshall)
Ed Nelson
Walter Olkewicz (Sgt. Shug Crawford)
Stephen Burleigh (Theodore Van Kirk)