Guest Stars Fiona Dolman as Sarah Barnaby Tamzin Malleson as Dr. Kate Wilding Noah Huntley as Aidan Hardy Alan Williams as Ezra Canning Robert Pugh as Caradoc Singer Susan Brown as Leticia Clifford Lee Ross as Sgt. Trevor Gibson Claudia Harrison as Eleanor Preston Colin Tarrant as Eric Justin Shevlin as Alex Preston Richard Leaf as Evan Jago