Thrilling crime drama starring Yellowstone’s Kelly Reilly is coming soon to Sky
Under Salt Marsh ranks amongst the most eagerly awaited crime dramas heading to screens in 2026, with Yellowstone sensation Kelly Reilly taking on an electrifying new character.
Crafted, penned and directed by Claire Oakley, and featuring Rafe Spall (Trying) in a key role, the series unfolds in an imaginary Welsh coastal settlement facing potential evacuation due to surging sea levels and perilous storms.
Following a shocking crime, the incident resurrects haunting memories of another spine-chilling occurrence from three years prior that left the close-knit community reeling.
Reilly embodies a teacher and ex-detective who feels driven to probe deeper when her previous colleague, portrayed by Spall, turns up to handle the fresh investigation.
With only days remaining before this moody and captivating murder mystery hits our screens, here’s everything we know about what lies ahead, reports the Express.
What is Under Salt Marsh About?
Yellowstone’s Kelly Reilly takes on the role of Jackie Ellis, a primary school educator whose detective career was destroyed by her niece’s baffling vanishing three years earlier.
Following the discovery of one of her pupils’ remains on the edges of the fictional settlement of Morfa Halen, she must confront the traumatic past whilst forging an uneasy partnership with her ex-colleague, detective Eric Bull.
Throughout the six-part series, Jackie and Bull expose the residents’ dark and startling secrets to determine whether the crimes are connected and identify the culprit.
The synopsis for Under Salt Marsh states: “As a huge storm starts to form far out at sea, a teacher and former detective, Jackie Ellis, finds the body of her 8-year-old student, Cefin, who appears to have drowned.
“This shocking discovery stirs up the town’s memories of an unresolved case from three years earlier – the disappearance of Jackie’s niece, Nessa, which ruined her career.
“Cefin’s death brings back Jackie’s old partner, Detective Eric Bull, to lead the investigation in a community where he previously failed. Believing the two cases are connected, Jackie and Bull must work together to uncover hidden secrets in Morfa Halen before the storm hits and wipes away any evidence.”
Who features in Under Salt Marsh’s cast?
Yellowstone star Kelly Reilly and Rafe Spall head up the cast, supported by an impressive mix of established names and emerging talent.
The series also features Jonathan Pryce as Solomon Bevan, the town’s patriarch. Pryce has recently gained recognition for his roles in acclaimed dramas The Crown and Slow Horses.
Additional key cast members include Industry’s Harry Lawtey portraying local resident Dylan Rees, and Wolfe’s Naomi Yang as Jess Deng, Eric’s colleague.
The supporting cast includes:
- Dinita Gohil (Sandman, Greed)
- Brian Gleeson (Bad Sisters, Phantom Thread)
- Kimberley Nixon (Fresh Meat, Life and Death in the Warehouse)
- Mark Stanley (Happy Valley, The Reckoning)
- Dino Fetscher (Fool Me Once, Foundation)
- Lizzie Annis (The Witcher: Blood Origin, Extraordinary)
- Rhodri Meilir (Pren Ar y Bryn/Tree On A Hill, Craith/Hidden)
- Julian Lewis Jones (House of the Dragon, Wheel of Time)
- Newcomer Amara Atwal as Nessa
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Sky TV packages
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When does Under Salt Marsh launch?
The gripping new thriller arrives in one week’s time on Friday, 30th January, streaming exclusively via Sky Atlantic and NOW. Two episodes will drop initially, with subsequent instalments released weekly each Friday.
The highly anticipated finale is scheduled to broadcast on Friday, 27th February.
Under Salt Marsh debuts Friday, 30th January on Sky Atlantic and NOW.