Guest Stars T.R. Knight as J. Edgar Hoover David Dencik as Niels Bohr Jodhi May as Helen Dukas Nikola Djuricko as Leo Szilard Jolyon Coy as Max Laue Robert Picardo as Abraham Flexner Adam Garcia as Moe Berg Ania Bukstein as Margarita Konenkova Christian Rubeck as Werner Heisenberg Rob LaBelle as Henry Morgenthau Karel Dobrý as Mikhail Ivanushkin John Sackville as R. Davis Halliwell Co Starring Zita Téby as Older Ilse Lucy Farrett as Older Margot Nancy Crane as Eleanor Roosevelt Miles Richardson as Vannever Bush Bryan Bounds as Judge David Hunt as General Leslie Groves Jim High as British Guard Georg Nikoloff as Sergei Konenkov Gunnar Cauthery as Joseph Goebbels Stephen Chance as Paul Scherrer Charlie Field as Carl Von Weizsacker Mitchell Mullen as Franklin Roosevelt Timo Willman as Young Nazi Steve Mirer as Doctor Tom Knight as Waspy Donor Daniel Kötter as Gestapo Officer
