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