Under Salt Marsh

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

Under Salt Marsh
Genre	Crime drama
Created by	Claire Oakley
Screenplay by	Claire Oakley
Directed by	Claire Oakley Mary Nighy
Starring	Kelly Reilly Rafe Spall Jonathan Pryce Naomi Yang Harry Lawtey
Country of origin	United Kingdom
Original language	English
Production
Executive producers	Claire Oakley Megan Spanjian Elwyn Rowland Kelly Reilly
Producer	Scott Bassett
Production companies	Little Door Productions Sky Studios
Original release
Network	Sky Television

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.^[1]

Cast and characters

• Kelly Reilly as Jackie Ellis^[2]
• Rafe Spall as Detective Eric Bull^[3]
• Jonathan Pryce^[3]
• Naomi Yang^[3]
• Harry Lawtey^[3]
• Dinita Gohil^[3]
• Brian Gleeson^[3]
• Kimberley Nixon^[3]
• Mark Stanley^[3]
• Dino Fetscher^[3]
• Lizzie Annis^[3]
• Rhodri Meilir^[3]
• Julian Lewis Jones^[3]

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. Kelly Reilly was cast in the lead role in August 2024.^[2] In October 2024, Rafe Spall, Jonathan Pryce, Naomi Yang and Harry Lawtey joined the cast, amongst others.^[3]

Filming began in October 2024, with the production taking place entirely in Wales with sites in Barmouth, Fairbourne, Anglesey and South Wales.^[4] Support for the project comes from Creative Wales.^[5]