The story of two journalists who investigated an unsolved mass murder in Northern Ireland. Six men were shot dead by Loyalist paramilitaries in the Height’s Bar, Loughinisland on the 18th June 1994.

No-one has ever been charged or convicted.

Episode 8 – Who Watches the Watchmen

As the dust settles on a historic judgement by the Investigatory Powers Tribunal – Barry and Trevor say their fight is not yet over, demanding a full public inquiry to reveal the full extent of surveillance.

Can a wide-ranging review of surveillance powers commissioned by the Chief Constable of the PSNI provide answers - and can a balance between national security legislation and the need for transparency ever truly be achieved?

A BBC Northern Ireland Production