

1938: Robert Oppenheimer's life is changed by the discovery of nuclear fission and the appearance of Kitty Harrison.

1942: America is at war. Oppenheimer is engaged in the race to produce an atomic bomb.

1943: Oppenheimer is director of Los Alamos, but his past Communist associations alert the FBI.

Summer 1944: Oppenheimer has problems with his staff and the development of the bomb.

May 1945: The European war is over but the war with Japan continues. Oppenheimer discusses the use of the almost completed atomic bomb with the secretary of War. His colleagues have misgivings.