John Bowen Creator Patricia Routledge Hetty Wainthropp Actor Derek Benfield Robert Actor Dominic Monaghan Geoffrey Actor John Graham-Davies D.C.I. Adams (as John Graham Davies) Actor Ronald Pickup Lester Rose Actor Janet Hargreaves Gillian Snape Actor Katherine Dow Blyton Kelly Actor Peter Gunn Bryan Actor Barbara Dryhurst Lysette Actor Joan Sims Adele McCarthy Actor Freddie Davies Sidney Sturridge Actor Rebecca Lamb Magda Actor Gordon Langford Rowe William Pollard Actor Judith Davis Ida Wittle Actor Joe Belcher Arnold Wittle Actor Laura Crossley Wendy Actor Susan Edmonstone Vanessa Webb Actor David Giles Director Jeremy Paul Writer