"Richard Sorge was a man with two homelands. Born of a German father and a Russian mother in Baku in 1895, he moved in a world of shifting alliances and infinite possibility. A member of the angry and deluded generation who found new, radical faiths after their experiences on the battlefields of the First World War, Sorge became a fanatical communist - and the Soviet Union's most formidable spy."

Joining me to discuss Sorge is Owen Matthews.

Owen is the former Moscow and Istanbul Bureau Chief for Newsweek Magazine and has just has just released a biography of Richard Sorge, An Impeccable Spy: Richard Sorge, Stalin's Master Agent. It's a cracking read! I thoroughly enjoyed it…