"The first modern-style code ever executed on a computer was written in the 1940s, by a woman named Klára Dán von Neumann–or Klári to her family and friends. And the historic program she wrote was used to develop thermonuclear weapons. This season, we peer into a fascinating moment in postwar America through the prism of Klári’s work. We explore the evolution of early computers, the vital role women played in early programming, and the inextricable connection between computing and war."