Copyright of Coastal Productions: The second episode in series six of this compelling drama series, forensic clinical psychologist Dr Tony Hill (Robson Green) is brought in by Inspector Alex Fielding (Simone Lahbib) to uncover the identity of a serial murderer who is killing prostitutes and experimental psychologists in a very specific sequence.
At first it looks as if the murders are unrelated - committed by two different serial killers - and the police are treating the murders of the prostitutes and psychologists as separate cases. But as the investigations unfold, Tony begins to see parallels between the motivations of both sets of murders, and using his understanding of the criminal mind, he reveals that it is in fact the same killer perpetrating both.
