Guest Stars Fiona Dolman as Sarah Barnaby Annette Badland as Dr. Fleur Perkins Isabel Shaw as Betty Barnaby Geff Francis as Billy Bevan Mariam Haque as Jenny Bennet Sabina Franklyn as Elaine Bennet Lorne MacFadyen as Lionel Bennet Gary Beadle as Damian Bennet Tom Conti as Sebastian Cabot Alex Walkinshaw as Sam Engells Peter Polycarpou as Giles Franklyn Jules Robertson as Charlie Cabot Elizabeth Payne as Ruth Cabot Diana Yekinni as Matty Bennet