Guest Stars Jack Deam as DC Ken Blackstone Danny Rahim as DC Tariq Lang Keith Barron as Arthur Banks Badria Timimi as Dr. Allen Matt Lanigan as Michael Morton Natasha Little as Elaine Foster Cal MacAninch as DS Martin Hexton Richie Campbell as Liam Fallon Nicholas Gleaves as Gerald Foster Tanya Fear as Melanie Thomas Mark Letheren as Matthew Tate Amber Batty as Sarah Tate James Bloor as Spencer Foster Alan Cooke as DCI Denmoor Amy Marston as Dr. Beverley Calcutt Helen Mackay as Waitress