Watch Under Salt Marsh (2026) Free Online

No secrets are safe from the storm.

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.

Under Salt Marsh is a 2026 crime and mystery TV series created by Claire Oakley starring Kelly Reilly, Rafe Spall and Naomi Yang. The series has 1 season and 6 episodes. Viewers rate it 6.6/10 on TMDB based on 68 votes.

  • First aired: 2026-01-30
  • Seasons: 1
  • Episodes: 6
  • Status: Ended
  • Genres: Crime, Mystery
  • TMDB rating: 6.6/10

Under Salt Marsh cast

Kelly Reilly, Rafe Spall, Naomi Yang, Harry Lawtey, Dino Fetscher, Dinita Gohil, Kimberley Nixon, Julian Lewis Jones, Jonathan Pryce

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