Day One - Production & Contact Info

Cast	+ Add Cast
68 cast members

Name	Known for
Brian Dennehy Gen. Leslie Groves Gen. Leslie Groves See fewer	First Blood (1982)
David Strathairn J. Robert Oppenheimer J. Robert Oppenheimer See fewer	Good Night, and Good Luck. (2005)
Michael Tucker Leo Szilard Leo Szilard See fewer	L.A. Law (1986)
Hume Cronyn James F. Byrnes James F. Byrnes See fewer	Cocoon (1985)
Richard Dysart President Harry S. Truman President Harry S. Truman See fewer	The Thing (1982)
Hal Holbrook Gen. George Marshall Gen. George Marshall See fewer	Into the Wild (2007)
Barnard Hughes Secretary of War Henry Stimson Secretary of War Henry Stimson See fewer	The Lost Boys (1987)
John McMartin Dr. Arthur Compton Dr. Arthur Compton See fewer	Blow Out (1981)
David Ogden Stiers President Franklin D. Roosevelt President Franklin D. Roosevelt See fewer	MAS*H (1972)
Anne Twomey Kitty Oppenheimer Kitty Oppenheimer See fewer	Deadly Friend (1986)
Lawrence Dane Actor Actor See fewer	Scanners (1981)
Ron Frazier Colonel Pash Colonel Pash See fewer	Head Office (1985)
Olek Krupa Edward Teller Edward Teller See fewer	Home Alone 3 (1997)
Bernie McInerney Actor Actor See fewer	Dan in Real Life (I) (2007)
John Pielmeier Seth Seth See fewer	The Pillars of the Earth (2010)
Ken Pogue Groves's Commanding Officer Groves's Commanding Officer See fewer	The 6th Day (2000)
Gary Reineke Dwight D. Eisenhower Dwight D. Eisenhower See fewer	Spider (2002)
Alan Scarfe Actor Actor See fewer	Lethal Weapon 3 (1992)
John Seitz Under Secretary of the Navy Ralph A. Bard Under Secretary of the Navy Ralph A. Bard See fewer	The Prowler (1981)
Tony Shalhoub Enrico Fermi Enrico Fermi See fewer	Monk (2002)
Ester Spitz Trude Weiss Trude Weiss See fewer	Het bittere kruid (1985)
Ron White Colonel Nichols Colonel Nichols See fewer	Screamers (1995)
István Bálint Eugen Wigner (as Stephan Balint) Eugen Wigner (as Stephan Balint) See fewer	Jakob the Liar (1999)
Peter Boretski Albert Einstein Albert Einstein See fewer	Naked Lunch (1991)
Patrick Breen Richard Feynman Richard Feynman See fewer	Galaxy Quest (1999)
Vlasta Vrana Hans Bethe Hans Bethe See fewer	The Glass Castle (2017)
George Popovich Samuel Goudsmit Samuel Goudsmit See fewer	Mr. Nice Guy (1997)
Lorne Brass Klaus Fuchs Klaus Fuchs See fewer	The Fountain (2006)
Michael Sinelnikoff Lord Rutherford Lord Rutherford See fewer	The Lost World (1999)
Graham Haley Haakon Chevalier Haakon Chevalier See fewer	X-Men: The Animated Series (1992)
Fritz Buchinger Dr. Vincent Dr. Vincent See fewer	Day One (1989)
Kliment Denchev Michael Polanyi Michael Polanyi See fewer	Bokser (1967)
Diana Fajrajsl Ilse Polanyi Ilse Polanyi See fewer	The Trumpeter (1986)
Timothy Webber Colonel Lansdale Colonel Lansdale See fewer	War for the Planet of the Apes (2017)
Harry Standjofski Robert Wilson Robert Wilson See fewer	X-Men: Days of Future Past (2014)
Lia Sargent Mrs. Wisnovsky Mrs. Wisnovsky See fewer	Perfect Blue (1997)
David Gow Jack Wisnovsky Jack Wisnovsky See fewer	Steel Toes (2006)
Michael Farrell Shapp Shapp See fewer	Killpoint (1984)
Isabelle Mejias Mrs. Trowbridge Mrs. Trowbridge See fewer	Scanners II: The New Order (1991)
Jonathan Wise Robert Serber Robert Serber See fewer	Three O'Clock High (1987)
George R. Robertson Ed Condon Ed Condon See fewer	Police Academy 2: Their First Assignment (1985)
Dee McCafferty William 'Deke' Parsons William 'Deke' Parsons See fewer	Dead Ringers (1988)
Tom Butler Captain DeSilva Captain DeSilva See fewer	Freddy vs. Jason (2003)
Robert Morelli T.O. Jones T.O. Jones See fewer	Resident Evil: Apocalypse (2004)
Jon Baggaley James Tuck James Tuck See fewer	If Looks Could Kill (1991)
David Bolt Harry Gold Harry Gold See fewer	Videodrome (1983)
David Ferry Army Major Army Major See fewer	The Boondock Saints (1999)
Heinar Piller Fleischmann Fleischmann See fewer	The Sum of All Fears (2002)
François Klanfer Haagen Kistiakowski Haagen Kistiakowski See fewer	The Virgin Suicides (1999)
Joel Miller George Kistiakowski George Kistiakowski See fewer	Lost Junction (2003)
Michael J. Reynolds Kenneth Bainbridge Kenneth Bainbridge See fewer	The Descent: Part 2 (2009)
Ed McGibbon Admiral William D. Leahy Admiral William D. Leahy See fewer	The Neptune Factor (1973)
Nicholas Kilbertus Paul Tibbets (as Nick Kilbertus) Paul Tibbets (as Nick Kilbertus) See fewer	Scanners (1981)
Joe Cazalet Air Force Guard Air Force Guard See fewer	Wild Thing (1987)
Scott Thomson Chemist Chemist See fewer	Twister (I) (1996)
Bob Clout Alfred MacCormack Alfred MacCormack See fewer	Goosebumps (1995)
Roland Hewgill Army General Army General See fewer	John and the Missus (1987)
Stan Gibbons John J. McCloy John J. McCloy See fewer	Scanners III: The Takeover (1991)
Terrence Labrosse Allan Dulles Allan Dulles See fewer	Are You Afraid of the Dark? (1990)
Delise Alison London Pedestrian London Pedestrian See fewer	Day One (1989)
Alex Guard British Jr. Officer British Jr. Officer See fewer	The Barretts of Wimpole Street (1982)
Philip Spensley British Sr. Officer British Sr. Officer See fewer	If Looks Could Kill (1991)
Frederick Neumann Alexander Sachs Alexander Sachs See fewer	Reversal of Fortune (1990)
Norris Domingue General Pa Watson General Pa Watson See fewer	Blind Fear (1989)
Steve Barry Los Alamo Scientist (uncredited) Los Alamo Scientist (uncredited) See fewer	Death Wish (2018)
Lex Gord Girl (uncredited) Girl (uncredited) See fewer	M Is for Merman (2013)
Arthur Holden Scientist (uncredited) Scientist (uncredited) See fewer	Whiteout (2009)
Romano Orzari Leo Szilard's Prime Scientist (uncredited) Leo Szilard's Prime Scientist (uncredited) See fewer	Northern Shade (2022)