Guest Stars Fiona Dolman as Sarah Barnaby Tamzin Malleson as Dr. Kate Wilding Tony Haygarth as George Napier Genevieve O'Reilly as Nina Morgan Alexander Hanson as Patrick Morgan Paul Nicholls as Dave Foxely Allan Corduner as Michael Hipsman Nicholas Boulton as Dr. Markham James Dreyfus as Ralph Ford Amanda Lawrence as Olivia Carter Ella Al-Khalil Coyle as Aimee Whitley Paul Bigley as Tim Whitley