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