DS Sarah Collins and her colleague, DC Steve Bradshaw, investigate the deaths of long-serving police officer, PC Hadley Matthews, and a 15-year-old Libyan refugee, Farah Mehenni, who have fallen from the roof of Portland Tower in south-east London.
With Lizzie still on the run, Sarah finally persuades her boss, DCI Tim Bailie, to go public about Lizzie's disappearance, then makes a series of discoveries about the events that led up to the Portland Tower fall which further complicate the case.
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.
Crime thriller series. DS Sarah Collins joins Homicide Command and is tasked with a cold case, and PC Lizzie Adams's willingness to do things by the book is tested by a call-out.
Crime thriller series. Sarah and Lizzie find themselves working the same murder with their mutual distrust still apparent, but they must cooperate if they are to find a lost child.
Crime thriller series. The team are left reeling when Brannon's YouTube video goes viral, and Sarah and Elaine make a grim discovery that exposes a vile predator and a vital clue.
Gemma Whelan
DS Sarah Collins
Tahirah Sharif
PC Lizzie Adama
Jimmy Akingbola
DC Steve Bradshaw
Emmett J. Scanlan
DI Kieran Shaw
Nick Holder
PC Hadley Matthews