When human remains are found buried in the central reservation of the M1, Cassie and Sunny begin the task of identifying them.

Peter, Chris, James and Tim are all interviewed by Cassie and Sunny about the time they spent renting a holiday cottage near where Hayley disappeared over the turn of the millennium. James is the first to be called in, and reveals that Tim and Chris both had their families with them at the time. He recalls seeing press coverage of Hayley's disappearance, but never having seen her in person. Meanwhile, Chris is looking at flats with Jamila, who resolves that she needs to know everything about his past before she will take their relationship further.