An explosive exposé of how British military intelligence really works, from the inside. The stories of two undercover agents -- Brian Nelson, who worked for the Force Research Unit (FRU), aiding loyalist terrorists and murderers in their bloody work; and the man known as Stakeknife, deputy head of the IRA's infamous 'Nutting Squad', the internal security force which tortured and killed suspected informers.
Greg Harkin is the Belfast journalist who broke the Stakeknife story.