Unforgotten

When a woman's remains are found near a motorway, the team try to identify her. Multiple men fall under suspicion, as the woman had been missing for a long time.

Cassie and Sunny go searching for Hayley's family; a detective who was originally on the case has his own thoughts on what happened.

Cassie and Sunny interview Peter, Chris, James, and Tim about the time they stayed in the rented holiday cottage.

In the wake of Mel Hollis's account, Sunny and Cassie realise the men all lied about that night, particularly Pete; the team uncovers some disturbing information about Chris; Cassie worries about her dad.

Cassie and Sunny call the three men back for more questioning after discovering that they have all lied about their whereabouts that night. The focus shifts to James as Cassie and Sunny suspect his son could have been involved.

The team don't believe Tim's story about the incriminating items located at his house; a new discovery leaves the team reeling.