Set in a post-Troubles Northern Ireland, The Truth Commissioner follows the fictional story of Henry Stanfield, played by Roger Allam, a career diplomat who has just been appointed as Truth Commissioner to Northern Ireland. Eager to make good as a peacemaker, the Prime Minister urges a commission following the South African model of Truth and Reconciliation. But, though Stanfield starts bravely, he quickly uncovers some bloody and inconvenient truths about those now running the country; truths which none of those in power are prepared to have revealed.

Roger Allam
as Henry Stanfield

Sean McGinley
as Francis Gilroy

Barry Ward
as Michael Madden

Conleth Hill
as Johnny Rafferty

Madeleine Mantock
as Laura

Tom Goodman-Hill
as Jake Marston

Simone Kirby
as Maria Walshe

Brid Brennan
as Catherine Gilroy

Ian McElhinney
as James Fenton

Lia Williams
as Prime Minister