Old Wounds (S05E02)

The discovery of human remains partially buried in the woods leads Stanhope and Healy back to the disappearance of a local schoolgirl during a coalminers' strike 30 years earlier. At the time, everyone believed she had run off to London after problems at home, and the police had paid little attention to the case. Then evidence turns up indicating the girl was at the scene of the strike. (Prime Video)