Elenco (na ordem dos créditos)
Danny Shorago
Narrator
H.W. Brands
Self
Michael Neiberg
David Silbey
Self - Historian
Orlando Figes
Richard P. Hallion
Tony Judt
Gary Tinterow
Jill Jonnes
Ron Suny
Max Allan Collins
Marc Wanamaker
Richard B. Jewell
Philip Furia
John Parsons
Morgan Spurlock
Gloria Steinem
Hew Strachan
Self - Professor of the History of War, Oxford University
Devin Pendas
Self - Assistant Professor of History, Boston College
James S. Corum
Julie Wheelwright
Allan Maca
Eleanor Holmes Norton
Martin Gilbert
Marvin Meyer
John Lukacs
Dean Kamen
David Cannadine
Peter Seligmann
Arturo Beeche
Rashid Khalidi
Joshua Kosman
James Brabazon
Paul O'Prey
Declan Kiely
Robert Service
Harold P. Blum
CEO Sigmund Freud Archives
Jules Witcover
Sally Roesch Wagner
Kent Weeks
Michela Wrong
Author
Moshe Lewin
Barbara Masekela
Gary Sheffield
Friedrich Katz
Thomas Hoving
Martin Ewans
James Maas
Prof. Psychology Cornell Univ.
Suliman Baldo
Aid Program Director
Ed Hedemann
David Fromkin
Rex A. Wade
Marc Dierikx
Rosalyn Terborg-Penn
Shula Marks
Roger Corman
Michael Massimino
Walter Cronkite
Diane Warren
Colin Powell
Henry Kissinger
Leonard Maltin
Glen Ballard
Elvis Mitchell
Barbara Boxer
Richard Schickel
Bob Thomas
Hal David
A.E. Hotchner
John Binder
Stephen Kinzer
A. Scott Berg
Paul Robeson Jr.
Michael Dinwiddie
Gary Giddins
Margaret MacMillan
Lowell Thomas Jr.
Leon Litwack
David Sterritt
Robert Sklar
Robert Kimball
Stanley Karnow
Richard Koszarski
David Kyvig
Thomas Hischak
Laurence Maslon
David Ostwald
Lee D. Baker
Vinh Long Ngo
John Milton Cooper
Kevin C. Fitzpatrick
Roger Launius
Samir Sumaidaie
Rick Jewell
Julianne Malveaux
Jeffrey T. Sammons
J. Gordon Melton
Anne Allison
Laurence Bergreen
William Duiker
Omer Taspinar
Dan Morgenstern
Marion Meade
Radu Florescu
Catherine Gilbert Murdock
Narrator (2007)
Kathleen Antonia
Narrator 'Hellfighters: Harlem's Heroes of World War I'