We'll Support You Evermore (1985)

Starring: John Thaw and Ciaran Hinds as Liam O'Hagan.
Synopsis: A grieving father (Thaw) investigates the brutal murder of his son, a member of the British military serving in Northern Ireland, on a remote farm. Despite reports that the death was the result of a secret mission and that his son, in fact, died as a hero, Hollins (Thaw) goes on a mission to uncover the truth. Hinds has a brief appearance as the murder suspect's brother.