Taggart (1983)

Season 23: Episode 4

When Terry Brogan, an alcoholic cancer sufferer, is accused of bludgeoning his wife to death, D.S. Reid finds it difficult to believe that he is guilty of murder, and she sets out to prove his innocence - despite compelling evidence to the contrary. But as the net closes in on the murderer, her irrational sympathy threatens to jeopardise the whole case.