The true story of an American trucker who became one of MI5's most important spies. Just when the Real IRA was bombing Britain and threatening to wreck the Northern Ireland peace process, the group's boss was spilling his secrets to David Rupert, who passed everything on to the FBI and MI5. In a broadcast exclusive, Rupert tells his extraordinary story to Jennifer O'Leary.

Conor Spackman hears chilling testimony from relatives of those slain in a spate of gun murders in north and west Belfast over the past five years. He examines links between the killings and investigates a shadowy dissident republican group claiming to be on ceasefire.