Detective Sergeant Sheralyn Melton is tasked with tracking down a suspect who allegedly committed a rape after meeting a woman on a dating website. Meanwhile, Detective Superintendent Andrew Murphy and senior investigating officer Detective Chief Inspector Dean Holden are hunting a killer who stabbed a Polish man to death in Blackpool before going on the run.
In the second episode, the detectives begin an investigation into an armed robbery at a post office in which thieves seized £186,000. The cashier tells police he was knocked out with chloroform by a raider, who is shown on CCTV wielding a gun before emptying the safe and escaping in the cashier's car. Something about the CCTV footage tells detectives all is not as it appears - the robber seems to deliberately place the gun in view, and the cashier seems prepared for him to attack.
On 17 August 2016, Sarah Williams and Katrina Walsh were found guilty of the murder of Sadie Hartley. This dramatic documentary tells the gripping story of how detectives solved this truly vicious and shocking murder - from the first call to the crime scene, through to the convictions of the killers.
In this programme, detectives investigate an armed robbery at a remote farmhouse where the owner was tied up and various items stolen including seven hunting rifles and his car. Detectives also seek the truth when a baby is severely injured during a shocking incident of domestic violence.