Ike's Mystery Man shines a bright light on the indispensable contributions and sacrifices made by patriotic gay Americans in an era when Executive Order 10450 banned anyone suspected of 'sexual perversion' from any government job, and gays in the government were persecuted by the likes of Joseph McCarthy and Roy Cohn in the Senate, and J. Edgar Hoover and Clyde Tolson at the FBI. It also shows that Eisenhower's National Security Advisor Robert 'Bobby' Cutler shaped US Cold War strategy in far more consequential ways than has been previously understood.