Sam Waterston

~ as ~

Robert Oppenheimer

John Carson

~ as ~

Narrator

Shane Rimmer

~ as ~

Ed Condon

Alexander Knox

~ as ~

Henry Stimson

Jana Shelden

~ as ~

Kitty Oppenheimer

Phil Brown

~ as ~

Lewis Strauss

Edward Hardwicke

~ as ~

Enrico Fermi

David Suchet

~ as ~

Edward Teller

James Maxwell

~ as ~

Lloyd Garrison

Milton Johns

~ as ~

George Kistiakowsky