Episode 4

A jacket recovered from a suspect's home is found to have the DNA of two stabbing victims on it as police hunt for the person behind a series of seemingly unprovoked attacks. There's little for police to go on after a man is left to die in the street, and when the attacker strikes again, they are in a race against time to find the person responsible.Elsewhere, a fingerprint found on the number plate of the getaway car used in the armed robbery of a neighbourhood pub leads police to their suspect.