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