A new mystery series, Magpie Murders, has been released on PBS, with some outlets referring to related works such as Moonflower Murders and Marble Hall Murders. The series is a meta mystery and appears to be part of a larger project involving author Anthony Horowitz. A third TV sequel to Magpie Murders and Moonflower Murders is reportedly in the works, although details about the relationship between these titles and Marble Hall Murders are unclear.