Billy Crystal as Lt. Jacob 'Jake' Beser

Kim Darby as Lucy Tibbets

Patrick Duffy as Col. Paul Tibbets

Gary Frank as Maj. Tom Ferebee

Gregory Harrison as Capt. Bob Lewis

Stephen Macht as Maj. William 'Bud' Uanna

Walter Olkewicz as Sgt. Shug Crawford

Robert Pine as Capt. William 'Deke' Parsons

James Shigeta as Field Marshal Abehata

Robert Walden as J. Robert Oppenheimer

Richard Venture as Alexander Sachs

Richard Herd as Gen. Groves

Henry Wilcoxon as Secretary of War Stimson

Ed Nelson as President Harry S. Truman

Stephen Roberts as President Franklin D. Roosevelt

Michael Tucci as Capt. Claude Eatherly

Than Wyenn as Gen. Curtis LeMay

Stephen Burleigh as Theodore Van Kirk

Marion Yue as Aya

Bill Morey as Gen. George Marshall

John Fujioka as Gen. Nagai

James Saito as Lt. Tatsuo Yamato

Phillip Pine as

Ned Wilson as

Michael Currie as

Bill Hutton as

Matt McGowan as

Rummel Mor as

Glenn Morrissey as

Stephen Keep Mills as

Stanley Grover as

Peter Jason as

Tony Lucatorto as

Leslie Moonves as

Richard Mulholland as

Jed Nolan as

Lynn Hancock as

Charles Benton as

Will MacMillan as

Peter Fox as