Turn: Washington's Spies is an American period drama television series developed by Craig Silverstein and based on Alexander Rose’s book Washington's Spies: The Story of America's First Spy Ring (2007), a history of the Culper Ring. The series aired on AMC from April 6, 2014, through August 12, 2017. During the course of the series, 40 episodes of Turn: Washington's Spies aired, concluding on August 12, 2017.