Christine Granville spent five years running some of the war's most dangerous missions for British intelligence, smuggling microfilm across the Tatra Mountains into occupied Poland, talking her way out of a Gestapo interrogation in Hungary, and later parachuting into France to work with the Resistance ahead of D-Day. Winston Churchill reportedly called her his favorite spy, and this History Hit film traces how a Polish countess became indispensable to Allied intelligence while colleagues and rivals alike doubted a woman could survive what she attempted. The story does not end with victory. In 1952, years after the war, Granville was stabbed to death in a London hotel by a man obsessed with her, a death investigators and historians have puzzled over ever since given how many enemies she made in wartime Europe. Historians and archival photographs carry the account from the mountain crossings to the London stabbing, weighing whether her murder was really the crime of passion it was ruled to be or something with deeper roots in her espionage career.