S1, E5: Cadi and Vaughan’s investigations lead them to question Bryn Roberts who owns a local reclamation yard. Despite being uncooperative, Bryn tells them of Endaf Elwy, a man who used to work for him and who was imprisoned for the murder of his niece Anna Williams. At the Police HQ, Cadi and Vaughan look at the Anna Williams case files and they are struck by how similar she is in appearance to the other missing and murdered girls. Could it be possible that the wrong man has been in prison for all of these years?