Guest Stars Matthew Marsh as Geoff Marks Tilly Vosburgh as Mary Tyler Jim Carter as Matthew Charlton Lee Whitlock as Graham David Quilter as Dr. George Graves Jo Stone-Fewings as Mark Sutton Angela Barlow as Mrs. Davies Annie Hayes as Mrs. Bristow Joanna Phillips-Lane as Claire Charlton Angela Shafto as Jeannie Charlton Daniel Coleman as Dean Charlton Fleur Taylor as Shelley Susannah Streeter as Penny Scott Lane as Danny