The team race to find evidence to prove the identity of Hayley's killer.
As Cassie and Sunny get closer to the truth, the case takes a devastating turn for Cassie.
Cassie and Sunny suspect the men are lying. The press learn James has been questioned.
Cassie and Sunny interview four men while the team returns to the original investigation.
The team travel to Middenham to meet Hayley's family.
Cassie and Sunny work to identify human remains found buried near a London motorway.