Guest Stars Tony Robinson as Roger Smith Richard Coleman as Chief Inspector Trusscott John Boswall as Professor Humber Judi Spiers as Television Presenter Ron Donachie as Police Doctor Marcia Warren as Annie Smith Beverley Walding as Receptionist Hywel Bennett as Harold Bingham Debbie Arnold as Mrs. Bingham Charles Pemberton as Police Constable Louise Beattie as Amanda Dora Bryan as Mrs. Mim Neale McGrath as Shop-Keeper
