Day One Characters

Characters played by Brian Dennehy

• Gen. Leslie Groves

Characters played by David Strathairn

• J. Robert Oppenheimer

Characters played by Michael Tucker

• Leo Szilard

Characters played by Hume Cronyn

• James F. Byrnes

Characters played by Richard Dysart

• President Harry S. Truman

Characters played by Hal Holbrook

• Gen. George Marshall

Characters played by Barnard Hughes

• Secretary of War Henry Stimson

Characters played by John McMartin

• Dr. Arthur Compton

Characters played by David Ogden Stiers

• President Franklin D. Roosevelt

Characters played by Anne Twomey

• Kitty Oppenheimer

Characters played by Lawrence Dane

• [no data]

Characters played by Ron Frazier

• Colonel Pash

Characters played by Olek Krupa

• Edward Teller

Characters played by Bernie McInerney

• [no data]

Characters played by John Pielmeier

• Seth

Characters played by Ken Pogue

• Groves's Commanding Officer

Characters played by Gary Reineke

• Dwight D. Eisenhower

Characters played by Alan Scarfe

• [no data]

Characters played by John Seitz

• Under Secretary of the Navy Ralph A. Bard

Characters played by Tony Shalhoub

• Enrico Fermi

Characters played by Ester Spitz

• Trude Weiss

Characters played by Ron White

• Colonel Nichols

Characters played by István Bálint

• Eugen Wigner

Characters played by Peter Boretski

• Albert Einstein

Characters played by Patrick Breen

• Richard Feynman

Characters played by Vlasta Vrana

• Hans Bethe

Characters played by George Popovich

• Samuel Goudsmit

Characters played by Lorne Brass

• Klaus Fuchs

Characters played by Michael Sinelnikoff

• Lord Rutherford

Characters played by Graham Haley

• Haakon Chevalier

Characters played by Fritz Buchinger

• Dr. Vincent

Characters played by Kliment Denchev

• Michael Polanyi

Characters played by Diana Fajrajsl

• Ilse Polanyi

Characters played by Timothy Webber

• Colonel Lansdale

Characters played by Harry Standjofski

• Robert Wilson

Characters played by Lia Sargent

• Mrs. Wisnovsky

Characters played by David Gow

• Jack Wisnovsky

Characters played by Michael Farrell

• Shapp

Characters played by Isabelle Mejias

• Mrs. Trowbridge

Characters played by Jonathan Wise

• Robert Serber

Characters played by George R. Robertson

• Ed Condon

Characters played by Dee McCafferty

• William 'Deke' Parsons

Characters played by Tom Butler

• Captain DeSilva

Characters played by Robert Morelli

• T.O. Jones

Characters played by Jon Baggaley

• James Tuck

Characters played by David Bolt

• Harry Gold

Characters played by David Ferry

• Army Major

Characters played by Heinar Piller

• Fleischmann

Characters played by François Klanfer

• Haagen Kistiakowski

Characters played by Joel Miller

• George Kistiakowski

Characters played by Michael J. Reynolds

• Kenneth Bainbridge

Characters played by Ed McGibbon

• Admiral William D. Leahy

Characters played by Nicholas Kilbertus

• Paul Tibbets

Characters played by Joe Cazalet

• Air Force Guard

Characters played by Scott Thomson

• Chemist

Characters played by Bob Clout

• Alfred MacCormack

Characters played by Roland Hewgill

• Army General

Characters played by Stan Gibbons

• John J. McCloy

Characters played by Terrence Labrosse

• Allan Dulles

Characters played by Delise Alison

• London Pedestrian

Characters played by Alex Guard

• British Jr. Officer

Characters played by Philip Spensley

• British Sr. Officer

Characters played by Frederick Neumann

• Alexander Sachs

Characters played by Norris Domingue

• General Pa Watson

Characters played by Steve Barry

• Los Alamo Scientist

Characters played by Lex Gord

• Girl

Characters played by Arthur Holden

• Scientist

Characters played by Romano Orzari

• Leo Szilard's Prime Scientist