Guest Stars Fiona Dolman as Sarah Barnaby Manjinder Virk as Dr. Kam Karimore Caroline Langrishe as Janey Rafferty James Fleet as Michael Falconer Maggie O'Neill as Audrey Glenhill Simon Callow as Vernon De Harthog Flora Spencer-Longhurst as Natalie Wheeler Callum Blake as Jacob Wheeler Cyril Nri as Warwick Sowande Robert Daws as Hamish Rafferty Joseph Prowen as Dan Falconer Rosie Holden as Candice Rafferty Colin Michael Carmichael as Ivo Baxter Matthew Jacobs Morgan as Zak Sowande