On 13th January 1953, a stunned world learned that a vast conspiracy among Jewish doctors to murder Kremlin leaders had been unmasked. Pravda reported that several of the doctors had confessed to the crime. Mass arrests followed. The Doctors' Plot, as this action came to be called, was Stalin's last great criminal conspiracy. In the years since Stalin's death many myths have grown about it, while Stalin's own motives have been the object of endless speculation. Did he himself invent it or was it engineered by subordinates who wished to eliminate Kremlin rivals? Was Stalin motivated by venomous anti-Semitism? How was this plot related to the Cold War then raging in Europe and the war in Korea? And, finally, was the Doctors' Plot connected with Stalin's convenient death? Through access to previously unseen Soviet documents, this great conundrum of Cold War politics is unravelled for the first time.