Guest Stars Tristan Sturrock as Zacky Martin Louis Davison as Geoffrey Charles Ed Browning as Paul Daniel Amelia Clarkson as Rosina Hoblyn James Wilby as Lord Falmouth Robert Daws as Dr. Choake Esme Coy as Rowella Chynoweth Will Merrick as Arthur Solway Ciara Charteris as Emma Tregirls Mike Burnside as Nathaniel Pearce