TV tonight: a thrillingly murky Welsh drama

The Light in the Hall is back, and Bear Grylls runs wild with Flight of the Conchords’ Rhys Darby. Plus: Timothée Chalamet’s Wonka! Here’s what to watch this evening9pm, Channel 4
Caryl (Sian Reese-Williams) is making a midlife career change to journalism. As she trains, she is drawn to Rhys Owen (Mark Lewis Jones), who has returned to Llanemlyn after 30 years in prison for the murder of his activist cousin. What happened in Caryl’s life that makes her so curious a