To End All War: Oppenheimer & the Atomic Bomb

Richard Rhodes

Self - Author, "The Making of the Atomic Bomb"

Mareena Robinson Snowden

Self - Nuclear Security Expert

Alan B. Carr

Self - Senior Historian, Los Alamos National Laboratory

Gregg Herken

Self - Author, "Brotherhood of the Bomb"

Jennet Conant

Self - Author, "109 East Palace"

David Eisenbach

Self - History Professor, Columbia University

Alex Wellerstein

Self - Nuclear Historian

Martin J. Sherwin

Self - Co-Author, "American Prometheus" (voice)

Michio Kaku

Self - Theoretical Physicist

Leslie Groves

Self - Director, Manhattan Project (voice) (archive footage)

Charles Oppenheimer

Self - Grandson

Robert Christy

Self - Theoretical Physicist (voice) (archive footage)

Robert S. Norris

Self - Author, "Racing for the Bomb"

Hideko Tamura

Self - Hiroshima Survivor (Age 10)

Roy Glauber

Self - Scientist, Manhattan Project (voice) (archive footage)

Edward Teller

Self - Theoretical Physicist (archive footage)

Eleanor Roosevelt

Self (archive footage)

Judy Woodruff

Self (voice) (archive footage)

Adolf Hitler

Self (archive footage)

Albert Einstein

Self (archive footage)