Transuranic elements; nuclear reactor design. Weizsc̃ker's work in Berlin at Otto Hahn and Peter Debye's institutes; the discovery of nuclear fission; military service exemptions for scientists. Competition within the German uranium project; nuclear explosives. End of the war; Werner Heisenberg and Samuel Goudsmit; Farm Hall and critical mass of a chain reaction. Weizsc̃ker's interest in policy; interest in the civil uses of nuclear energy; uranium research as a method of survival; German science policy after 1955; the Gt̲tingen Manifesto. Also prominently mentioned are: Peter Josef William Debye, Kurt Diebner, Samuel Abraham Goudsmit, Otto Hahn, Werner Heisenberg, Karl Heinz Hc̲ker, Frďřic Joliot-Curie, Schumann, and Karl Wirtz.