Elenco (na ordem dos créditos)
Greg Stebner
Self - Narrator
Max Hastings
Self - Author, 'Armageddon'
Kerry Smith
Self - Professor, Brown University
Gregory J.W. Urwin
Self - Professor, Temple University
William Atwater
Self - Curator, US Army Ordnance Museum
Alan Brinkley
Self - Professor, Columbia University
Omer Bartov
Donald Dencker
Self - WWII Veteran, Pacific
Richard Rhodes
Self - Author, 'The Making of the Atomic Bomb'
James Sheehan
Self - Professor, Stanford University
Thomas Childers
Self - Professor, Univ of Pennsylvania
Jonathan Steinberg
Self - Professor, Univ. of Pennsylvania
Jay Lockenour
Alex Kershaw
Self - Author, 'The Longest Winter'
Stanley Galler
Self - Manhatton Project Scientist, Los Alamos
Ted Zetlin
Self - WWII Veteran, Europe
Peter Duus
Charles Armstrong
Self - Assoc. Professor, Columbia University
Chester Gusick
James L. Wilson
Paul Hennessey
William Leyden
Fred Ashworth
Self - Vice Admiral, US Navy (Ret.)
Robert Fike
Self
Bronia Rubin
Self - Holocaust Survivor
Paul Murphy
Roy Tew
Theodore Rockwell
Self - Author, 'Creating the New World'
McAllister Hull
Self - Explosives Expert, Manhattan Project
James Spence
Henry Senger
Linda Goetz Holmes
Self - Author 'Unjust Enrichment'
Theodore Van Kirk
Michael Moroz
Harry Herder
Haywood Campbell
George Elsey
Roger Neighborgall
Allen Striffler
Don Peoples
Narrator
Werner Reich
Marcia Savella
Valentin Ildefonso
Self - WWII Veteran, Philippines
Darrell Landau
James Eagleton
Masatake Okumiya
Self - WWII Japanese Naval Officer
Gerald Astor
Self - Author 'Operation Iceberg'
Frank South
Les Evans
Self - RAF Squadron Leader, WWII
Walter Rozamus
Self - Former US Intelligence Officer
John Mitchell
Otto Erxleben
Self - German Soldier
Bob Daniell
Fred Eva
Self - British POW, WWII
Fred Murphy
Robert Fentriss
Self - US Navy Photographer
Svetlana Kasakova
Self - Russian Civilian
Richard D. Winters
Mark Almond
Self - Lecturer, Oxford University
Roscoe Brown
Wolfgang Leonhard
Self - German Communist, WWII
Clifford Yorke
Self - British Medic, WWII
Paul Christie
Thomas A. Begay
Geoffrey Perry
Tom Dennis
Lawrence Boris
Jim Reed
Maria Platinov
Ed Acheson
Sergo Beria
Suzuko Numata
Henry Graff
Terence Kirk