Guest Stars Fiona Dolman as Sarah Barnaby Tamzin Malleson as Dr. Kate Wilding Natalie Mendoza as Sasha Fleetwood James Callis as Toby DeQuetteville James Callis as Julian DeQuetteville Raquel Cassidy as Diana DeQuetteville Kerry Fox as Betty DeQuetteville Paul Ritter as Harry Fleetwood Eleanor Bron as Izzy DeQuetteville Louisa Clein as Amanda Harding William Gaunt as Ludo DeQuetteville James Clay as Simon DeQuetteville Murray Melvin as Bentham DeQuetteville
