The fourth series sees AC-12 facing their most devious opponent yet! Under pressure from her superiors, DCI Roz Huntley charges a young man with a series of murders after months of fruitless investigation, but is he guilty? The Chief Forensic Investigator has doubts and turns to AC-12.
Streaming, rent, or buy Line of Duty – Season 4:
Currently you are able to watch "Line of Duty - Season 4" streaming on C More, Acorn TV, Comhem Play or buy it as download on SF Anytime.