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 Rob LaBelle as Henry Morgenthau Adam Garcia as Moe Berg Ania Bukstein as Margarita Konenkova Christian Rubeck as Werner Heisenberg 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 Bryan Bounds as Judge Jim High as British Guard Miles Richardson as Vannever Bush Tom Knight as Waspy Donor Daniel Kötter as Gestapo Officer Mitchell Mullen as Franklin Roosevelt Gunnar Cauthery as Joseph Goebbels Stephen Chance as Paul Scherrer Charlie Field as Carl Von Weizsacker Georg Nikoloff as Sergei Konenkov Timo Willman as Young Nazi Steve Mirer as Doctor David Hunt as General Leslie Groves
