Guest Stars T.R. Knight as J. Edgar Hoover Sally Dexter as Older Mileva David Dencik as Niels Bohr Jodhi May as Helen Dukas Nikola Djuricko as Leo Szilard Joshua Akehurst as Hans Albert Einstein (Age 15) Ed Stoppard as Adult Hans Albert Einstein Neal Huff as Robert Oppenheimer Aidan McArdle as Dr. Thomas Harvey Joseph Arkley as David Bohm Michael Lindall as Agent McKee Dixie Egerickx as Alice Edwards Co Starring Nancy Crane as Eleanor Roosevelt Bob Boudreaux as Congressman Rankin Sinéad Phelps as Secretary Roy McCrerey as Committee Chair Magnus Af Sandeberg as Male Secretary MaryKathryn Kopp as Nurse Kit Ross as Younger Albert Einstein Joshua Glenister as Bernhard Einstein Jasmin von der Born as Frieda Einstein Stewart Alexander as Harold Urey Carla Dixon as Evelyn Einstein Cornelius Geaney, Jr. as Assistant Director Andrew Boyer as Doctor Markus Pfeiffer as Young Hermann Einstein Bob Karper as Field Director Howard Lotker as Reporter Gary Fannin as Technician
