Day One

Michael Tucker as Leo Szilard Hume Cronyn as James F. Byrnes John McMartin as Dr. Arthur Compton Michael Sinelnikoff as Lord Rutherford Arthur Holden as Scientist (uncredited) David Strathairn as J. Robert Oppenheimer Isabelle Mejias as Mrs. Trowbridge Romano Orzari as Leo Szilard's Prime Scientist (uncredited) Tom Butler as Captain DeSilva Lorne Brass as Klaus Fuchs Brian Dennehy as Gen. Leslie Groves Ken Pogue as Dwight D. Eisenhower Gary Reineke as Groves's Commanding Officer Timothy Webber as Colonel Lansdale David Ferry as Army Major Barnard Hughes as Henry Stimson David Ogden Stiers as Franklin D. Roosevelt Bernie McInerney Tony Shalhoub as Enrico Fermi Ron White as Colonel Nichols Vlasta Vrana as Hans Bethe Dee McCafferty as William 'Deke' Parsons Michael J. Reynolds as Kenneth Bainbridge Patrick Breen as Richard Feynman Olek Krupa as Edward Teller Anne Twomey as Kitty Oppenheimer Harry Standjofski as Robert Wilson Jonathan Wise as Robert Serber George R. Robertson as Ed Condon Alan Scarfe Roland Hewgill as Army General Kliment Denchev as Michael Polanyi Lawrence Dane Lia Sargent as Mrs. Wisnovsky Scott Thomson as Chemist Ron Frazier as Colonel Pash Richard Dysart as President Harry S. Truman Hal Holbrook as Gen. George Marshall John Seitz as Ralph A. Bard David Gow as Jack Wisnovsky

Aaron Spelling Executive Producer Ken Gord Executive In Charge Of Production Joseph Sargent Director Jocelyne Bellemare Makeup Department Head David W. Rintels Teleplay, Producer Mason Daring Original Music Composer