Welcome to the Keeping Mum guide at TV Tome. 
Peggy Beare (Stephanie Cole) is getting rather 'dotty' in her old age.  Her son Andrew (Martin Ball) has his hands full looking after her and making sure that she stays out of trouble.  Peggy thinks that her other son, Richard (David Haig), is wonderful. He always has plenty to say about his mother's welfare but does as little as possible to help out.