Under Salt Marsh

7.0 Jan 2026 1 Season 6 Episodes

Ended

Overview

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.

Created by Claire Oakley

Sky Studios · Little Door Productions

Cast

Kelly Reilly

Jackie Ellis

Rafe Spall

Eric Bull

Jonathan Pryce

Solomon Bevan

Naomi Yang

Jess Deng

Harry Lawtey

Dylan Rees

Bevan Thomas

Bevan Bevan

Key Crew

Mary Nighy

Director

Claire Oakley

Director

Claire Oakley

Writer

Jonathan Harbottle

Writer

Nikita Lalwani

Writer

Megan Spanjian

Executive Producer

Elwen Rowlands

Executive Producer

Claire Oakley

Executive Producer

Scott Bassett

Producer

Episode 1

When ex-detective-turned-teacher Jackie Ellis discovers one of her pupils dead, her estranged partner DS Bull returns to investigate.

Jan 30, 2026 52m ★ 5.8

Episode 2

Old accusations resurface as Jackie and Bull must put aside years of mistrust before the town's tensions ignite into violence

Jan 30, 2026 56m ★ 5.8

Episode 3

With the town turning on itself as long-buried secrets emerge, Jackie and Bull's fragile partnership is tested by a new discovery.

Feb 6, 2026 51m ★ 5.8

Episode 4

DNA evidence exposes a devastating truth, forcing Jackie and Bull to choose between protecting themselves or those they love.

Feb 13, 2026 51m ★ 2.5

Episode 5

Rising floodwater cuts Morfa Halen off from the world as another body is discovered, with Bull closing in on the truth behind an illegal operation at the heart of all three cases.

Feb 20, 2026 48m ★ 4.7

Episode 6

Jackie and Bull discover the horrifying truth behind the crimes that haunt Morfa. As Bull fights for his life and Jackie faces an unbearable choice, the storm reaches its peak.

Feb 27, 2026 47m ★ 7.7

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