How is a legacy preserved, and how is someone forgotten? Determined to make a final name for himself, Irving Langmuir ventures into science that even he might classify as pathological wishful thinking, while Katharine continues her work as the diligent experimenter. But her contributions faded from both the company’s and the public’s memory. We go to visit her, to say good-bye – and we look at the wisdom she imparted to the next generation of ​​inquiring minds.