The Light in the Hall (2022)

A grieving mother and a journalist face the parole of the man convicted of a murder in a Carmarthenshire village, and Joanna Scanlan is devastating as the mother. Alexandra Roach and Iwan Rheon, both Welsh, round out a cast that makes the village feel lived in. Made in English and Welsh versions as Y Golau, it premiered on S4C and later reached Channel 4, which makes the English cut easy to find. A second story, Still Waters, followed in 2025 with a largely new cast, so you can stop after either series.