Espionage. The word brings to mind the Cold War - Stasi informants and surveillance bugging in East Berlin. Or today’s media promoted anxieties about Chinese infiltration. But for this episode, Calder Walton came onto the World Wars podcasts to talk about spying during the Second World War. Calder researches History that is relevant to the policy making of today’s governments and intelligence communities. He talks to James about the depth of the Soviet spies’ permeation of their allies, and its effect.