Description：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.
Description：Homeless and on the run from a military court martial, a damaged ex-special forces soldier navigating London's criminal underworld seizes an opportunity to assume another man's identity, transforming into an avenging angel in the process.
