Guest Stars Fiona Dolman as Sarah Barnaby Tamzin Malleson as Dr. Kate Wilding Alan Williams as Ezra Canning Susan Brown as Leticia Clifford Robert Pugh as Caradoc Singer Noah Huntley as Aidan Hardy 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