American Playhouse

Sam Waterston

Robert Oppenheimer

Edward Herrmann

Alger Hiss

John Carson

Narrator (voice)

David Suchet

Edward Teller

Jana Shelden

Kitty Oppenheimer

Edward Hardwicke

Enrico Fermi

Christopher Muncke

Colonel Kenneth Nichols

Sada Thompson

Widow Douglas

Hallie Foote

Elizabeth Vaughn

Jeffrey DeMunn

Peter

Paul Guilfoyle

Peter Whitman

Robert Serber

Manning Redwood

General Leslie Groves

Matthew Guinness

Hans Bethe

Elizabeth Franz

Dottie McCann

Barton Heyman

Jack

Frederic Forrest

Pap Finn

Josh Hamilton

Lovely Mead

Robert Joy

Mr. Tapping

Tom Aldredge

The Narrator / The Mysterious Man

John Morton

Robert Wilson

Garrick Hagon

Frank Oppenheimer

Bob Sherman

Ernest Lawrence

Barry Dennen

Isidor Rabi