The Red King stars Anjli Mohindra as Grace, a detective sergeant posted to the fictitious island of St Jory, off the Welsh coast.
Grace and police constable Owen (James Bamford) investigate the murder of a boy, Cai, despite lack of cooperation from most residents.
Main characters are former sergeant Gruffudd (Mark Lewis Jones), pub owner Lowri (Lu Corfield), her daughter Winter (Maeve Courtier-Lilley), doctor and Cai's father Ian (Marc Warren) and Nancarrow descendant Heather (Adjoa Andoh).
The local doctor, Ian, asks Grace to solve the case of his missing son, Cai, who had disappeared a year earlier.
Grace finds Cai's corpse in a derelict shelter, but homicide investigators from mainland Wales rule it an accidental death before returning.
Grace obtains an aerial photo of the shelter area, on the date when Cai died, which shows True Way symbolism and Mihangel's car parked nearby.
The executive producers are Nicola Shindler and Davina Earl for Quay Street Productions, Philippa Collie Cousins for UKTV and writer Whithouse and director Daniel O’Hara.
[2] The cast includes Anjli Mohindra, Adjoa Andoh, Marc Warren and Jill Halfpenny, as well as Mark Lewis Jones, Oliver Ryan, Sam Swainsbury, Lu Corfield, James Bamford and Maeve Courtier-Lilley.
[3] The story is set on the fictitious St Jory island off the Welsh coast, but was filmed in Northumberland, and had begun by 19 June 2023.
They said "The Red King applies entertaining topspin to the road-tested premise, adding yet more rug-pulls and buckets of sarcasm and self-reflexiveness.