After Cambridge student Guy Burgess went to work as a spy for the Soviet Comintern, he resigned his membership in the British Communist Party and pretended to have joined the political right. In 1936, with a glittering set of recommendations from well-placed friends and acquaintances, he got a job as a radio producer at the BBC.

Almost immediately, he proved his value to his Kremlin masters: he introduced pro-Russian radio programming (diplomat Harold Nicolson, a friend of Burgess’s, complained that thanks largely to Burgess’s efforts, BBC coverage of the Soviet Union was “completely distorted”); he was involved in the broadcast of speeches by high-level politicians and military officers whose gossip he readily passed on to Moscow; and he used his position at the Corporation to help established his Cambridge friend and fellow spy Anthony Blunt as an on-air art expert. He also recruited various friends as spies.

But that wasn’t all. The Soviets, as it happened, really lucked out. Soon after going to work at the BBC, Burgess was also tapped by the office Prime Minister Stanley Baldwin to serve as a “secret courier between No. 10 Downing Street and the French government.” He was then hired by British intelligence to secretly report to it on the Prime Minister’s activities. In short, he was spying on the PM for British intelligence, and spying on both of them for the Soviets, to whom he provided a rich trove of material. His work for British intelligence also involved liaising with anti-Nazi groups around Europe and serving on the Joint Broadcasting Committee, which fed pro-British radio shows to the U.S. and Europe. The top-level connections he now enjoyed in Britain gave him “access to highly confidential information about the preparations for war” that proved extremely helpful to the Soviets. In particular, his tip-off that the British government felt it could easily defeat Hitler alone, and thus had no serious intention of allying with the USSR against him, helped convince Stalin that his only salvation lay in a temporary alliance with the Nazis.

In 1944, he was tasked with planning postwar British propaganda for the Foreign Office, and in that capacity had access to “almost all material produced by the Foreign Office.” The material he fed to the Russians at this point was “dynamite.” And it just got better: in 1946 he became private secretary to a top Foreign Office official and began to take part in the formulation of foreign policy. Thanks to him, Vyacheslav Molotov, the Soviet Foreign Minister, knew what the British and American position on Berlin was before the Brits’ own delegates to the 1947 London Conference did.

Yet nobody in British intelligence suspected what Burgess was up to; on the contrary, so highly trusted was he that when his superiors decided that there was need to fight Soviet propaganda with propaganda of their own, they tapped Burgess to help formulate it. Indeed, his immediate boss, Hector McNeil, trusted Burgess so much that McNeil asked him “to report on anyone who might be suspicious on the staff.”

More tomorrow.