J. Robert Oppenheimer
Self (archive footage)
Ellen Bradbury Reid
Self - Daughter of Los Alamos Scientist
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
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 sound)
Charles Oppenheimer
Self - Grandson
Robert Christy
Self - Theoretical Physicist (voice) (archive sound)
Robert S. Norris
Self - Author, "Racing for the Bomb"
Hideko Tamura
Self - Hiroshima Survivor (Age 10)
