From Worthy Down to Diego Suarez

From the moment when Douglas, a torpedo bomber pilot, became a double agent, he was marked for extinction by both sides. In the early years of World War II, Naval Intelligence saw him as dangerously unreliable while the GRU discovered that during the Spanish Civil War he supported POUM, anathema to Joseph Stalin who believed they were allies of Trotsky. After he had been awarded the DSC, attempts to murder him began in earnest for the third time. The hope was to kill him in action. Who would strike the first blow?