Series 4

Series 4 consists of six episodes and originally began airing on February 22, 2021 on ITV in the UK. The series is due to end on March 29, 2021. The series focuses on an investigation into the murder of Matthew Walsh. The cold case is assigned to Detective Chief Inspector Cassie Stuart and her team following the discovery of parts of Matthew's dismembered corpse in a freezer at a junk yard.