`Hayley Atwell tells the story of Adolph Tolkachev, one of the CIA's most prolific Russian assets, with his handler David Rolph. David's task was to keep this priceless information flowing, but first he had to make sure the KGB weren't onto him. What would YOU do? From SPYSCAPE, the headquarters of all things spy. A Cup And Nuzzle production. Series producer: Gemma Newby. Produced by Louise Clarke-Rowbotham. Music by Nick Ryan.