Courageous resistance fighter Elżbieta Zawacka, aka ‘Agent Zo’, was the only woman to parachute from Britain to Nazi-German occupied Poland during the Second World War. While being hunted by the Gestapo there, who arrested her entire family, she established a military intelligence network, couriered microfilm across wartime borders and, as the only female member of the Polish elite special forces, the ‘Silent Unseen,' played a key role in the largest organized act of defiance against Nazi Ger...