''Under Salt Marsh'' is an upcoming British crime thriller television series created by Claire Oakley and starring

Kelly Reilly Jessica Kelly Siobhán Reilly (born 18 July 1977) is an English actress. She first appeared on screen in 1995 on the series ''The Biz (TV series), The Biz''. Her other television work includes starring roles in the British crime drama ''Above S ...

Premise

As a huge storm starts to form far out at sea a teacher and former detective, Jackie Ellis (Kelly Reilly), 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 (Rafe Spall), 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. Also starring Oscar nominee Sir Jonathan Pryce as the head of a family intimately connected to the crime, “Under Salt Marsh” is a gripping story of a close-knit community threatened by the powers of nature and torn apart by a terrible crime.

Cast

Production

The six-part series is created by Claire Oakley who directs, along with Mary Nighy. Scott Bassett is series producer Oakley is also an executive producer alongside Elwen Rowlands for Little Door Productions and Megan Spanjian for Sky Studios.

was cast in the lead role in August 2024. In October 2024,

Rafe Spall Rafe Joseph Spall ( ; born 10 March 1983) is an English actor. Spall has appeared in films including '' Kidulthood'' (2006), '' A Good Year'' (2006), ''Hot Fuzz'' (2007), '' One Day'' (2011), ''Anonymous'' (2011), ''Prometheus'' (2012), '' Lif ...

Jonathan Pryce Sir Jonathan Pryce (born John Price; 1 June 1947) is a Welsh actor. He is known for his performances on stage and in film and television. He has received numerous awards, including two Tony Awards and two Laurence Olivier Awards as well as nom ...

Naomi Yang Naomi Yang may refer to: * Naomi Yang (musician) * Naomi Yang (actress) Naomi Yang, born Yang Yichen, is a Chinese-born British actress. She is best known for her roles in the BAFTA-nominated film Lilting (film), ''Lilting'' and Sky TV series ...

and Harry Lawtey joined the cast, amongst others. Filming began in October 2024, with the production taking place entirely in Wales with sites in Barmouth, Fairbourne, Anglesey and South Wales. Support for the project comes from Creative Wales.

References

{{Authority control 2025 British television series debuts Upcoming British television series Sky UK television dramas Television shows set in Wales Television shows filmed in Wales British English-language television shows