Self (archive footage)

J. Robert Oppenheimer

Acting

Self - Daughter of Los Alamos Scientist

Ellen Bradbury Reid

Acting

Self - Writer / Director, "Oppenheimer"

Christopher Nolan

Directing

Self - Filmmaker, "The Day After Trinity"

Jon Else

Directing

Self - Co-Author, "American Prometheus"

Kai Bird

Writing

Self - Science Educator

Bill Nye

Acting

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

Richard Rhodes

Acting

Self - Nuclear Security Expert

Mareena Robinson Snowden

Acting

Self - Senior Historian, Los Alamos National Laboratory

Alan B. Carr

Acting

Self - Author, "Brotherhood of the Bomb"

Gregg Herken

Acting

Self - Author, "109 East Palace"

Jennet Conant

Acting

Self - History Professor, Columbia University

David Eisenbach

Acting

Self - Nuclear Historian

Alex Wellerstein

Acting

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

Martin J. Sherwin

Acting

Self - Theoretical Physicist

Michio Kaku

Acting

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

Leslie Groves

Acting

Self - Grandson

Charles Oppenheimer

Acting

Self - Theoretical Physicist (voice) (archive sound)

Robert Christy

Acting

Self - Author, "Racing for the Bomb"

Robert S. Norris

Acting

Self - Hiroshima Survivor (Age 10)

Hideko Tamura

Acting

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

Roy Glauber

Acting

Self - Theoretical Physicist (archive footage)

Edward Teller

Acting

Self (archive footage)

Eleanor Roosevelt

Acting

Self (voice) (archive sound)

Judy Woodruff

Acting

Self (archive footage)

Adolf Hitler

Acting

Self (archive footage)

Владимир Путин

Acting

Self (archive footage)

习近平

Acting

Self (archive footage)

Albert Einstein

Acting