After the country's occupation in 1939, the people of Poland were brutally oppressed by the Nazi SS and Geheime Staatspolizei. Yet, they never gave up the fight. Throughout the Second World War, a Polish Underground State was established - the largest underground resistance movement in all of occupied Europe, covering both German and Soviet zones of occupation. In the last episode of this series, Professor Alexandra Richie travels to Warsaw to shed light on the numerous, heroic acts of resistance within the nation's capital and how they consistently hindered the Nazi war effort.