Billy Crystal ( Billy Crystal )

Lt. Jacob 'Jake' Beser

Kim Darby ( Kim Darby )

Lucy Tibbets

Patrick Duffy ( Patrick Duffy )

Col. Paul Tibbets

Gary Frank ( Gary Frank )

Maj. Tom Ferebee

Gregory Harrison ( Gregory Harrison )

Capt. Bob Lewis

Stephen Macht ( Stephen Macht )

Maj. William 'Bud' Uanna

Walter Olkewicz ( Walter Olkewicz )

Sgt. Shug Crawford

Robert Pine ( Robert Pine )

Capt. William 'Deke' Parsons

James Shigeta ( James Shigeta )

Field Marshal Abehata

Robert Walden ( Robert Walden )

J. Robert Oppenheimer

Richard Venture ( Richard Venture )

Alexander Sachs

Richard Herd ( Richard Herd )

Gen. Groves

Henry Wilcoxon ( Henry Wilcoxon )

Secretary of War Stimson

Ed Nelson ( Ed Nelson )

President Harry S. Truman

Stephen Roberts ( Stephen Roberts )

President Franklin D. Roosevelt

Michael Tucci ( Michael Tucci )

Capt. Claude Eatherly

Than Wyenn ( Than Wyenn )

Gen. Curtis LeMay

Stephen Burleigh ( Stephen Burleigh )

Theodore Van Kirk

Marion Yue ( Marion Yue )

Aya

Bill Morey ( Bill Morey )

Gen. George Marshall

John Fujioka ( John Fujioka )

Gen. Nagai

James Saito ( James Saito )

Lt. Tatsuo Yamato

Phillip Pine ( Phillip Pine )

Ned Wilson ( Ned Wilson )

Michael Currie ( Michael Currie )

Bill Hutton ( Bill Hutton )

Matt McGowan ( Matt McGowan )

Rummel Mor ( Rummel Mor )

Glenn Morrissey ( Glenn Morrissey )

Stephen Keep Mills ( Stephen Keep Mills )

Stanley Grover ( Stanley Grover )

Peter Jason ( Peter Jason )

Tony Lucatorto ( Tony Lucatorto )

Leslie Moonves ( Leslie Moonves )

Richard Mulholland ( Richard Mulholland )

Jed Nolan ( Jed Nolan )

Lynn Hancock ( Lynn Hancock )

Charles Benton ( Charles Benton )

Will MacMillan ( Will MacMillan )

Peter Fox ( Peter Fox )