Alan Bennett reads five extracts from the extended essay that gives his new book its name.
The untold stories he tells us are about his family and, in particular, his mother, his father, and his two favourite aunts.
His mother and father were devoted to each other; a devotion sustained through the regular bouts of chronic depression from which his mother, Lilian, suffers and which leads to her spending much of her later life in and out of hospitals.
Though intensely shy - as is her husband - Lilian is also a woman of great generosity and fun, with modest, but deeply-held social ambitions.
She longs to go to coffee mornings and cocktail parties, even though she has no idea what a cocktail is, and thinks a sausage on a stick an emblem of extraordinary sophistication.
Her husband, Walter, is a gentle and caring man, whose dream of retiring to the country, and pottering away in his garden, is rudely shattered by his wife's ill-health.