Unbelievable Spy Stories (originally aired on May 29, 2020)

Stephen Kinzer explains the twisted life of Sidney Gottlieb, a CIA operative who tortured and poisoned for a supposed greater good. Former CIA Chief of Counterintelligence James M. Olson on what it takes to catch a spy. Sonia Purnell tells the story of Virginia Hall, a highly unlikely but most dangerous Allied spy in WWII.