Under Salt Marsh: Story, Cast and Series Facts

Story and premise

Under Salt Marsh is set in the fictional Welsh town of Morfa Halen, a tight-knit community 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.

Cefin's death summons Jackie's former partner, Detective Eric Bull, back to Morfa Halen to lead the investigation into a community he failed once before. Convinced the cases are linked, Jackie and Bull must reconcile and race to uncover long-buried secrets inside Morfa, before the storm breaks and all the evidence is gone for good. An intimate and cinematic story, Under Salt Marsh takes audiences into the heart of a community bound by nature and fractured by an unthinkable crime.

Series details

• Title: Under Salt Marsh
• Format: Scripted
• Language: English
• Genres: Crime, Thriller
• Premiere date: 2026-01-30
• Final broadcast date listed: 2026-02-27
• Status in TVmaze: Ended
• Network listed by TVmaze: Sky Atlantic
• Network country: United Kingdom
• Typical episode runtime: 63 minutes
• TVmaze community rating: 6.4/10
• TVMaze ID: 79089
• IMDb ID: tt33741848
• TVDB ID: 453602

Cast and credited roles

• Kelly Reilly — Jackie Ellis
• Rafe Spall — Detective Eric Bull
• Jonathan Pryce — Solomon Bevan
• Naomi Yang — Jess Deng
• Harry Lawtrey — Dylan Rees
• Dino Fetscher — Gareth Evans
• Dinita Gohill — Nisha Jones
• Kimberley Nixon — Shell Hill
• Julian Lewis Jones — Osian Northam
• Lizzie Annis — Cara Rees
• Brian Gleeson — Mac Jones
• Mark Stanley — Danny Hill

Seasons in the TVmaze catalogue

• Season 1: premiered 2026-01-30; final listed air date 2026-02-27; episode order: 6.

Source and licence

Adapted from Under Salt Marsh on TVmaze. The synopsis is reproduced as plain text; catalogue facts, cast and season records are selected and reformatted. This adapted text is available under CC BY-SA 4.0, following the TVmaze API licence. Network and web-channel credits identify the service listed in this source; they do not establish current streaming availability.