Since her execution on the outskirts of Paris almost a century ago, the Dutch exotic dancer Margaretha “Gretha” MacLeod – universally known as Mata Hari – has been synonymous with female sexual betrayal. Convicted by the French of passing secrets to the enemy during the first world war, MacLeod's prosecutors damned her as the “greatest woman spy of the century”, responsible for sending 20,000 Allied soldiers to their deaths. MacLeod's status as both a foreigner and a divorcee, who was unrepentant about sleeping with officers of different nationalities, made her a perfect scapegoat in 1917.