The Tower

DS Sarah Collins and her colleague, DC Steve Bradshaw, officers in the Directorate of Special Investigations (DSI), are called to an incident at Portland Tower in south east London. They find at the bottom of the tower the dead bodies of long-serving police officer, PC Hadley Matthews, and a 15-year-old Libyan refugee, Farah Mehenni.

Lizzie decides to turn herself in, but first she meets Kieran Shaw in secret, who tries to persuade her not to implicate herself. When Sarah finally interviews Lizzie, the explosive truth about what really happened on top of the tower emerges

Sarah and Lizzie find themselves working on the same murder case.

The Brannon manhunt reaches its climax, and Sarah faces Tanias killer.

Sarah and Elaine uncover a disturbing link between their ongoing investigation and a brutal hit-and-run. Kieran urges Lizzie not to reveal the secrets of Operation Perseus.

Operation Perseus reaches its climax as Kieran prepares to catch Shakiel with a car-load of automatic weapons. However, Spencers killer, Jermaine King, has escaped from custody and kidnapped Ryans sister, Tia. Conclusion of the drama starring Gemma Whelan and Jimmy Akingbola.