All five episodes from the third series of the BBC crime drama in which a murder squad investigate complex cases in London. One of the detectives, however, DI David Bradford (Hugo Speer), takes the investigations more seriously when his own wife suddenly disappears. In this series, the team investigate whether or not a police officer is responsible for a string of murders and Rob (Bailey Patrick)'s family is threatened. The episodes are: 'Grace', 'Cyber Bully', 'Blood', 'Control Freak' and 'Crossing the Line'.