Guest Stars Fiona Dolman as Sarah Barnaby Tamzin Malleson as Dr. Kate Wilding Sharon Small as Ruth Cameron Hayley Mills as Lizzy Thornfield Lucy Akhurst as Camilla Strickland Marc Elliott as Nick Iver Lucinda Dryzek as Amy Strickland Tyger Drew-Honey as Ferdy Linklater Clive Wood as Johnny Linklater Catherine Bailey as Stephanie Weston Matt Kennard as Jamie Weston Neil McCaul as Martin Strickland Arabella Weir as Angela Linklater