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