Guest Stars Soo Drouet as Monica Eddie Marsan as Rick Grant Rosie Marcel as Dorothea Mikus Jake Wood as Toby Grant Diana Fairfax as Fiona Daniel O'Brien as Police Officer Lucy Robinson as Margaret Laker Tom Mannion as Rob Leonard Aicha Kossoko as Anaesthetist Anthony Ingram as Pub Landlord Lynsey Baker as Sarah Leonard Roger Llewellyn as Obstetrician Sammy Johnson as Greg Bailey Siobhan Nicholas as Psychiatric Registrar Tony Steedman as Leslie Josh Maguire as James Leonard