The Commander

Commander Clare Blake has risen to the top of her profession in the male-dominated Metropolitan Police Service, and is now the head of the serious crimes unit. Some years previously, she arrested James Lampton (Hugh Bonneville) for the murder of his beloved girlfriend. He was subsequently sentenced to life imprisonment, but has since been released on parole and has now become a successful author with a best-selling book based on his time in prison. Blake believes that Lampton is a reformed character, and begins to warm to his charms. However, Blake's colleagues, especially DCI Mike Hedges, believe that Lampton is responsible for another murder - and set out to prove his guilt

A murderer is using his computer expertise to blackmail hospital doctors, and threatens that a patient will die every twenty-four hours unless his demands are met. Commander Blake has her own personal problems - she is being stalked by the sister of a victim of James Lampton and is stabbed in the arm, and her sister is still fighting her battle against cancer.

The perfectly-preserved body of a two-year-old girl is found in a sealed oil drum in the basement of the derelict Elliston psychiatric hospital. Commander Blake assumes the role of senior investigating officer from DI Doug James, creating early conflict within the team as they set about investigating former patients and staff. As the team closes in on two particular suspects, there is a clash with the drugs squad, who are running a parallel investigation into one of them.

When DCI Janet Chambers (Connie Hyde) goes into labor, Commander Clare Blake takes charge of the investigation into the death of a two-year-old girl found on the site of a now abandoned psychiatric institute. The girl has been dead for several years, but her body had been stored in a tightly sealed drum and is well preserved as a result. She also has a cross branded onto her chest. The pathologist's report is inconclusive, so the team start to check medical records of former patients.

DAC Sumpter asks Commander Clare Blake to take charge of the investigation when Joan Hall, mother of former DS Brian Hall, is found beaten to death in her own home, and Brian is accused of the murder. When his prints are found on the murder weapon and his blood also found at the scene, Clare believes it to be an open-and-shut case, but DCI James refuses to accept that his former colleague could ever be responsible for such a crime. Meanwhile, James' wife Zoe goes into labour, but an argument with a fellow-to-be proves to be the action which begins a chain of terrifying events, when his new baby is abducted from the maternity ward.