Werner Heisenberg formulated the uncertainty principle, helped build quantum mechanics, and then led Nazi Germany's nuclear weapons program during World War II. Whether he deliberately sabotaged the German bomb effort or simply failed to solve the physics has been debated ever since — a question that sits at the intersection of science, morality, and wartime loyalty.

This episode traces Heisenberg from his revolutionary contributions to quantum mechanics through his controversial decision to stay in Nazi Germany, the failed uranium project, and the Farm Hall transcripts that captured German physicists' reactions when they learned of Hiroshima.

• The uncertainty principle and Heisenberg's foundational role in quantum mechanics
• His decision to remain in Nazi Germany and lead the uranium research program
• The debate ove ...