John Hurt as Chris Mullin

Martin Shaw as Ian McBride

Roger Allam as Charles Tremayne

John Kavanagh as Z

Robert Lang as Detective Superintendant Ibison

Patrick Malahide as Mike Mansfield

Bob Peck as Chief Supt. Tom Meffen

Donal McCann as N

Leslie Phillips as Lord Chief Justice Lane

Terence Rigby as Det. Supt. George Reade

David Ryall as Dr. Frank Skuse

John Woodvine as Tom Clarke

David Bamber as David Mellor MP, Home Office

Ciarán Hinds as Richard McIlkenny

Brid Brennan as Sister of IRA man

John Lynch as IRA man in cottage

Heather Chasen as The Right Honourable Margaret Thatcher

Tony Doyle as Richard Ferguson QC

James Berwick as Joe Cahill

Brendan Cauldwell as Callaghan

Julian Glover as Igor Judge QC

Peter Gowen as Eamon O'Connor

Ian McElhinney as Sinn Fein leader

Gerard McSorley as Paddy Mcllkenny

Sean McGinley as A

Niall O'Brien as Walker

Struan Rodger as Ex-IRA man

Niall Tóibín as Paddy Joe Hill

Donald Pickering as Douglas Hurd, Foreign Secretary

Andy Bradford as

David Howey as Bob Clay MP

Diane Fletcher as Gareth Peirce