Plot.
Poster of Under Salt Marsh

Under Salt Marsh

2026 · TV series

  • Crime
  • Mystery

Plot

Morfa Halen is a tight-knit Welsh town precariously nestled between towering mountains and a fast-encroaching sea that threatens its very existence. As a once-in-a-generation storm begins to gather far out at sea, former detective turned teacher Jackie Ellis discovers the body of her 8-year-old pupil, Cefin, seemingly drowned. The discovery sends shockwaves through the community, reviving the ghost of an unsolved cold case that rocked the town three years prior - the disappearance of Jackie’s niece, Nessa, which cost her career.

About Under Salt Marsh

Under Salt Marsh is a British crime thriller television series created by Claire Oakley and starring Kelly Reilly and Rafe Spall in the lead roles. Filmed in Wales, the series is set in the fictional North Wales village of Morfa Halen. The series premiered on 30 January 2026 on Sky Atlantic. In August 2026, it was renewed for a second series.

From Wikipedia, CC BY-SA 4.0.

Cast

  • Kelly ReillyJackie Ellis
  • Rafe SpallEric Bull
  • Naomi YangJess Deng
  • Harry LawteyDylan Rees
  • Dino FetscherGareth Morgan
  • Dinita GohilNisha Jones
  • Kimberley NixonShell Hill
  • Julian Lewis JonesOsian Northam
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