The first series focuses on DS Charlie Zailer (Olivia Williams) and DC Simon Waterhouse (Darren Boyd) as they investigate the double murder of a mother and her five-year-old child. This series was based on the novel The Point of Rescue.[2] Guest stars in this series include Rupert Graves, Amy Beth Hayes and Christina Chong. Episode one drew a strong overnight viewing audience of 5.4 million viewers.[3]

Series two involves the team dealing with the murder of a man who recently admitted to abusing a former girlfriend. This series was based on the novel The Other Half Lives. The main cast of Williams, Boyd, Wight and Ineson all returned for this series. Viewing figures were once again strong, drawing a similar audience to series one.