Russia's war in Ukraine, and Vladimir Putin's threat to unleash nuclear weapons, has put the world on edge. In 2018 we explored the complicated history of the nuclear age, and we thought it was an opportune time to revisit that episode. Our story focuses on Edward Teller, often called "The Father of the Hydrogen Bomb". He was also the force behind Reagan's Star Wars initiative, and the model for "Dr. Strangelove". Teller was a Hungarian math prodigy who fled Hitler's Germany. In America, he became one of the leading scientists at Los Alamos, developing the atomic bomb in a race against the Nazi war machine. But while many of Teller's colleagues later became disheartened by what they had unleashed, Teller stayed the course. His story is told here in his own voice, and by many of the other scientists who created the first weapons of mass destruction.