Under Salt Marsh

Under Salt Marsh is an upcoming British Sky original television crime thriller series starring Kelly Reilly.

Under Salt Marsh
Genre	Crime drama
Created by	Clare Oakley
Screenplay by	Clare Oakley
Directed by	Clare Oakley Mary Nighy
Starring	Kelly Reilly Rafe Spall Jonathan Pryce Naomi Yang Harry Lawtey Brian Gleeson Kimberley Nixon Brian Gleeson
Country of origin	United
Original language	English
No. of series	1
No. of episodes	6
Production
Executive producers	Clare Oakley Megan Spanjian Elwyn Rowland Kelly Reilly
Producer	Scott Bassett
Production companies	Little Door Productions Sky Studios

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

• Kelly Reilly as Jackie Ellis
• Jonathan Pryce
• Rafe Spall as Detective Eric Bull
• Harry Lawtey
• Naomi Yang
• Kimberley Nixon
• Brian Gleeson
• Mark Stanley
• Dino Fetscher
• Dinita Gohil
• Morgan Watkins
• Sam C. Wilson as Bryn Bevan
• Julian Lewis Jones
• Rhodri Meilir
• Dritan Kastrati as Victor Antonov
• Lizzie Annis
• Bevan Thomas as Bevan Bevan
• Jonah James as Harry Bevan
• Janeks Babidorics as August Antonov
• Iris Bea Williams as Izzie Bevan

Production

The six-part series is created by Clare 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. Kelly Reilly was cast in the lead role in August 2024. In October 2024, Rafe Spall, Jonathan Pryce, Kimberley Nixon 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.