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