Yn sgil y digwyddiad gyda'r gwn, mae'r tîm yn cysylltu Mel â llofruddiaethau hanesyddol Harvey. Progress is made but Ffion is convinced the killer of all three nurses may still be out there.
In the wake of the incident with the gun, the team links Mel to Harvey's historic murders. Progress is made but Ffion is convinced the killer of all three nurses may still be out there.
