Sion Alun Davies

In 1973, three girls were murdered in Wales. Nearly 30 years later, the police reopen the case. This true-crime drama follows DCI Bethell (Philip Glenister) through both timelines as his team uses revolutionary DNA techniques to find the killer.

A wealthy family hosts a sumptuous dinner, only for a mysterious young server to chillingly unravel their lives with terrifying consequences they could never see coming.