Narrator (voice)

Eliot Kohen

Acting

Self (archive footage)

J. Robert Oppenheimer

Acting

Self

Frank Oppenheimer

Acting

Self

Hans Bethe

Acting

Self

Edward Teller

Acting

Self

Isidor Isaac Rabi

Acting

Self

Emilio Segrè

Acting

Self

Harold Agnew

Acting

Self

Stanislaw Ulam

Acting

Self

Victor Weisskopf

Acting

Self

George Kistiakowsky

Acting

Self

Philip Morrison

Acting

Self

Priscilla Duffield

Acting

Self

Dorothy McKibbin

Acting

Self

Robert R. Wilson

Acting

Self

Edwin McMillan

Acting

Self

Robert Bacher

Acting