J. Robert Oppenheimer

Self (archive footage)

Christopher Nolan

Self - Writer / Director, "Oppenheimer"

Jon Else

Self - Filmmaker, "The Day After Trinity"

Kai Bird

Self - Co-Author, "American Prometheus"

Bill Nye

Self - Science Educator

Martin J. Sherwin

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

Michio Kaku

Self - Theoretical Physicist

Leslie Groves

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

Edward Teller

Self - Theoretical Physicist (archive footage)

Eleanor Roosevelt

Self (archive footage)

Judy Woodruff

Self (voice) (archive sound)

Adolf Hitler

Self (archive footage)