Masterspy of Moscow - George Blake (2015)

He said he was doing God's work on earth, but betrayed his colleagues to the KGB. Sentenced to 42 years in jail, George Blake escaped from Wormwood Scrubs five years later and fled to the Soviet Union. George Carey's film follows the strange life of this enigmatic traitor, tracking down people who knew him, and ending with an unexpected encounter in the woods outside Moscow.