Mark tells the story of a man called Joe Fenton and how he was connected to Stakeknife. We learn there was a hierarchy of agents, where some were saved and some were not.
Reporter: Mark Horgan Produced and written by: Mark Horgan and Ciarán Cassidy Co-Producer: Paddy Fee Editing and Sound Design: Ciarán Cassidy Composer: Michael Fleming Sound mixing: Ger McDonnell Theme tune by Lankum Artwork by Conor Merriman Assistant Commissioners for BBC: Lorraine Okuefuna and Sarah Green. Commissioning Editor for BBC: Dylan Haskins