Day One (1989) featured a cast of 66 tracked actors. Of these, 19 (40%) are still alive today and 29 have passed away. The oldest surviving cast member is Bernie McInerney, age 89. This film starred Brian Dennehy and David Strathairn.
40% still with us· verified cast29% of full cast · incl. 18 unverified
Survivorship
Cast Reunion Index: 40% still living
Avg. Age at Death: 78.9 yrs
Deaths by Year
1998
2010
2020
2025
Cast66 members
| Person | Character | Status | DOB | Age | DOD | Age in 1989 |
|---|---|---|---|---|---|---|
 Brian Dennehy Gen. Leslie Groves | Gen. Leslie Groves | Deceased | 09/07/1938 | 81 | 15/04/2020 | 51 |
 David Strathairn J. Robert Oppenheimer | J. Robert Oppenheimer | Living | 26/01/1949 | 77 | — | 40 |
 Michael Tucker Leo Szilard | Leo Szilard | Living | 06/02/1945 | 81 | — | 44 |
 Hume Cronyn James F. Byrnes | James F. Byrnes | Deceased | 18/07/1911 | 91 | 15/06/2003 | 78 |
 Richard Dysart President Harry S. Truman | President Harry S. Truman | Deceased | 30/03/1929 | 86 | 05/04/2015 | 60 |
 Hal Holbrook Gen. George Marshall | Gen. George Marshall | Deceased | 17/02/1925 | 95 | 23/01/2021 | 64 |
 Barnard Hughes Henry Stimson | Henry Stimson | Deceased | 16/07/1915 | 90 | 11/07/2006 | 74 |
 John McMartin Dr. Arthur Compton | Dr. Arthur Compton | Deceased | 21/08/1929 | 86 | 06/07/2016 | 60 |
 David Ogden Stiers Franklin D. Roosevelt | Franklin D. Roosevelt | Deceased | 31/10/1942 | 75 | 03/03/2018 | 47 |
 Anne Twomey Kitty Oppenheimer | Kitty Oppenheimer | Living | 07/06/1951 | 75 | — | 38 |
| Deceased | 03/04/1937 | 84 | 21/03/2022 | 52 | ||
 Ron Frazier Colonel Pash | Colonel Pash | Deceased | 10/12/1939 | 64 | 21/12/2003 | 50 |
 Olek Krupa Edward Teller | Edward Teller | Living | 18/03/1947 | 79 | — | 42 |
| Living | 04/12/1936 | 89 | — | 53 | ||
John Pielmeier Seth | Seth | Living | 23/02/1949 | 77 | — | 40 |
 Ken Pogue Dwight D. Eisenhower | Dwight D. Eisenhower | Deceased | 26/07/1934 | 81 | 15/12/2015 | 55 |
 Gary Reineke Groves's Commanding Officer | Groves's Commanding Officer | Deceased | 20/05/1940 | 84 | 23/09/2024 | 49 |
| Deceased | 08/06/1946 | 77 | 28/04/2024 | 43 | ||
 John Seitz Ralph A. Bard | Ralph A. Bard | Deceased | 16/11/1937 | 67 | 04/07/2005 | 52 |
 Tony Shalhoub Enrico Fermi | Enrico Fermi | Living | 09/10/1953 | 72 | — | 36 |
Ester Spitz Trude Weiss | Trude Weiss | Unverified | — | — | — | — |
 Ron White Colonel Nichols | Colonel Nichols | Deceased | 09/06/1953 | 64 | 04/04/2018 | 36 |
 Stephan Balint Eugen Wigner | Eugen Wigner | Deceased | — | — | 11/10/2007 | — |
Peter Boretski Albert Einstein | Albert Einstein | Deceased | 25/05/1929 | 72 | 05/09/2001 | 60 |
 Patrick Breen Richard Feynman | Richard Feynman | Living | 26/10/1960 | 65 | — | 29 |
 Vlasta Vrana Hans Bethe | Hans Bethe | Living | 01/01/1950 | 76 | — | 39 |
George Popovich Samuel Goudsmit | Samuel Goudsmit | Unverified | — | — | — | — |
 Lorne Brass Klaus Fuchs | Klaus Fuchs | Living | 26/03/1959 | 67 | — | 30 |
 Michael Sinelnikoff Lord Rutherford | Lord Rutherford | Deceased | 01/08/1928 | 95 | 01/07/2024 | 61 |
Graham Haley Haakon Chevalier | Haakon Chevalier | Deceased | — | — | — | — |
Kliment Denchev Michael Polanyi | Michael Polanyi | Deceased | 26/05/1939 | 69 | 29/03/2009 | 50 |
Diana Fajrajsl Ilse Polanyi | Ilse Polanyi | Unverified | — | — | — | — |
 Timothy Webber Colonel Lansdale | Colonel Lansdale | Unverified | — | — | — | — |
 Harry Standjofski Robert Wilson | Robert Wilson | Deceased | 22/05/1959 | 66 | 18/07/2025 | 30 |
 Lia Sargent Mrs. Wisnovsky | Mrs. Wisnovsky | Living | 20/02/1957 | 69 | — | 32 |
 David Gow Jack Wisnovsky | Jack Wisnovsky | Unverified | — | — | — | — |
Michael Farrell Shapp | Shapp | Unverified | — | — | — | — |
 Isabelle Mejias Mrs. Trowbridge | Mrs. Trowbridge | Living | 04/11/1961 | 64 | — | 28 |
 Jonathan Wise Robert Serber | Robert Serber | Unverified | — | — | — | — |
 George R. Robertson Ed Condon | Ed Condon | Deceased | 01/01/1933 | 90 | 29/01/2023 | 56 |
 Dee McCafferty William 'Deke' Parsons | William 'Deke' Parsons | Unverified | — | — | — | — |
 Tom Butler Captain DeSilva | Captain DeSilva | Living | 01/02/1951 | 75 | — | 38 |
 Robert Morelli T. O. Jones | T. O. Jones | Deceased | — | — | — | — |
Jon Baggaley James Tuck | James Tuck | Unverified | — | — | — | — |
David Bolt Harry Gold | Harry Gold | Deceased | 20/05/1944 | 71 | 04/10/2015 | 45 |
 David Ferry Army Major | Army Major | Living | 06/09/1951 | 75 | — | 38 |
 Heinar Piller Fleischmann | Fleischmann | Living | 01/01/1939 | 87 | — | 50 |
François Klanfer Haagen Kistiakowski | Haagen Kistiakowski | Unverified | — | — | — | — |
Joel Miller George Kistiakowski | George Kistiakowski | Unverified | — | — | — | — |
 Michael J. Reynolds Kenneth Bainbridge | Kenneth Bainbridge | Deceased | 15/08/1939 | 78 | 22/03/2018 | 50 |
Ed McGibbon William D. Leahy | William D. Leahy | Unverified | — | — | — | — |
Nicholas Kilbertus Paul Tibbets | Paul Tibbets | Unverified | — | — | — | — |
Joe Cazalet Air Force Guard | Air Force Guard | Unverified | — | — | — | — |
 Scott Thomson Chemist | Chemist | Living | 29/10/1957 | 68 | — | 32 |
 Bob Clout Alfred MacCormack | Alfred MacCormack | Deceased | 20/01/1934 | 77 | 04/09/2011 | 55 |
 Roland Hewgill Army General | Army General | Deceased | 11/02/1929 | 69 | 09/11/1998 | 60 |
Stan Gibbons John J. McCloy | John J. McCloy | Unverified | — | — | — | — |
Terrence Labrosse Allan Dulles | Allan Dulles | Deceased | 01/01/1933 | 70 | 18/12/2003 | 56 |
Delise Alison London Pedestrian | London Pedestrian | Unverified | — | — | — | — |
Alex Guard British Jr. Officer | British Jr. Officer | Unverified | — | — | — | — |
Philip Spensley British Sr. Officer | British Sr. Officer | Unverified | — | — | — | — |
 Frederick Neumann Alexander Sachs | Alexander Sachs | Deceased | 17/05/1926 | 86 | 27/11/2012 | 63 |
Norris Domingue General Pa Watson | General Pa Watson | Deceased | 22/07/1925 | 83 | 12/04/2009 | 64 |
Steve Barry Los Alamo Scientist (uncredited) | Los Alamo Scientist (uncredited) | Living | 30/01/1965 | 61 | — | 24 |
 Arthur Holden Scientist (uncredited) | Scientist (uncredited) | Living | 28/08/1959 | 67 | — | 30 |
 Romano Orzari Leo Szilard's Prime Scientist (uncredited) | Leo Szilard's Prime Scientist (uncredited) | Living | 12/12/1964 | 61 | — | 25 |
