Fifty Dead Men Walking

For four years, Martin McGartland lived a remarkable double life, a life not even known to the mother of his two children. To the Irish Republican Army, he was a trusted intelligence officer and integral member of an activist terrorist unit. To the British government, he was "Agent Carol". By night he helped plan bombings and shootings of innocent people, by day he passed on details of planned atrocities to British intelligence officers--heroically and fearlessly--until his cover was blown.