"Hidden Agenda"
1990
Directed by Ken Loach

Based loosely on the notorious Stalker case of 1982, involving a British officer who discovered a massive government cover-up, Hidden Agenda begins when Kerrigan, the Stalker-like protagonist, travels to Belfast to investigate the killing of an American lawyer who is also an IRA sympathizer. He discovers the murder was committed by the Royal Ulster Constabulary and exposes the cover-up. With Frances McDormand, Brad Dourif and Brian Cox.  108 minutes.