Guest Stars Fiona Dolman as Sarah Barnaby Manjinder Virk as Dr. Kam Karimore Ralf Little as Jared Horton Julia Sawalha as Penny Henderson Kingsley Ben-Adir as Bartholomew Hines Pippa Nixon as Rhiannon Sawney Ruth Sheen as Valerie Horton Jonathan Aris as Alex Dyer Gabrielle Lloyd as Hannah Dewsbrough Stefano Braschi as Dexter Ingram Edward MacLiam as Noah Sawney Kim Vithana as Zoe Dyer Malcolm Sinclair as Rev. Peter Corby Aden Gillett as Christopher Corby