Kelly Reilly and Rafe Spall investigate the murder of a child in Under Salt Marsh. Plus, David Baddiel concludes his mission to celebrate cats. Here’s what to watch this evening

9pm, Sky AtlanticAn engrossing crime drama that makes the most of its rugged Welsh coastal backdrop, complete with sheep running through the pub and cosy cardigans aplenty. Yellowstone’s Kelly Reilly leads the (not very Welsh) cast as Jackie, a pensive detective turned teacher with permanent bed hair. When she finds the body of her pupil in a ditch, her former colleague detective Eric Bull (Rafe Spall) arrives on the scene, still disturbed by the cold case that forced Jackie to leave the force three years earlier. Are the two crimes connected? Throw into the mix an impending killer storm and Jackie’s secret lover played by Harry Lawtey, and it makes for perfect winter telly. Hollie Richardson

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