Episode 1

S4 E1: In a career-defining case, DCI Roz Huntley is under intense pressure from her superiors to apprehend a serial killer after months of fruitless investigation. When another victim is abducted, Roz is on the scene to track down and charge a 24-year-old man. But doubts around the young man's guilt lead Chief Forensic Investigator Tim Ifield to alert AC-12 to a possible miscarriage of justice.