1x2 - When Missing Turns to Murder

In December 1988, 22-year-old Lorraine Benson arrived at Raynes Park tube station after going to a work Christmas party. She'd arranged to meet her friend Peter, but he wasn't there as planned. Peter was due to move to Australia the following day. Lorraine called Peter's mother to ask where he was, and his mother told her that he wasn't back from meeting friends yet.