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 Rob LaBelle as Henry Morgenthau Ania Bukstein as Margarita Konenkova Karel Dobrý as Mikhail Ivanushkin John Sackville as R. Davis Halliwell Christian Rubeck as Werner Heisenberg Co Starring Nancy Crane as Eleanor Roosevelt Zita Téby as Older Ilse Lucy Farrett as Older Margot Timo Willman as Young Nazi Bryan Bounds as Judge Charlie Field as Carl Von Weizsacker David Hunt as General Leslie Groves Miles Richardson as Vannever Bush Steve Mirer as Doctor Tom Knight as Waspy Donor Jim High as British Guard Mitchell Mullen as Franklin Roosevelt Georg Nikoloff as Sergei Konenkov Gunnar Cauthery as Joseph Goebbels Stephen Chance as Paul Scherrer Daniel Kötter as Gestapo Officer
