Perez and the team discover that the person that they believed to be responsible for the murders is closer to home than any of them thought. A new light is shone on the murder of Michael, when the team discover who assaulted Kelly. Leanne is struggling to deal with the emotional aftermath, after been shot. Perez is troubled when he discovers that Michael's witness protection handler Asha was in Lerwick on the same day that the email was sent out. The team dig deeper into Asha's past and discover a connection to one of McCall's team.
Elenco: Douglas Henshall , Alison O'Donnell , Steven Robertson , Mark Bonnar , Erin Armstrong , Julie Graham , Julia Brown , Fiona Bell , Neve McIntosh , Gerard Miller , Stephen Walters , Lewis Howden .