The Red King is a 2024 British crime drama television series consisting of six episodes, which aired on Alibi from 24 April to 29 May. It was created and written by Toby Whithouse and directed by Daniel O'Hara and Lisa Clarke.

The Red King stars Anjli Mohindra as Grace, a detective sergeant posted to the fictional island of St Jory, off the Welsh coast, as she invesitages the death of a young boy. St Jory is home to the True Way, a pagan cult which was established about 100 years ago by the Nancarrow family. Locals claim it no longer exists but celebrate festivals for the tourist trade. Grace and police constable Owen (James Bamford) investigate the murder of a boy, Cai, despite lack of cooperation from most residents. Other characters include former sergeant Gruffudd (Mark Lewis Jones), pub owner Lowri (Lu Corfield), her daughter Winter (Maeve Courtier-Lilley), Cai's father Ian (Marc Warren) and Nancarrow descendant Heather (Adjoa Andoh).