Guest Stars Belinda Lang as Mrs Clam Sarah Crowden as Miss Thimble David Sterne as Tom Thomas Virginia Fiol as Sister Reginald Tina Chiang as Sister Peter Carolyn Pickles as Reverend Mother Adrian Jack Gouldbourne as Norman Whalley Mat Fraser as Clement Rugg Elizabeth Rider as Heather Hartwood Louise Marwood as Jackie Rice Hannah Hutch as Lucy Jessop Caroline Sheen as Betty Jessop