Ruth Rendell Mysteries - Season 10 (1997)

After a lifetime of sibling rivalry, mousy May accepts an invitation from her recently-widowed younger sister June, to live with her in her elegant home.

After accepting her sister's offer of reconciliation, May emerges from her mousy shell and seduces her sister's lover.

Twelve-year-old James lives with his parents and sister. He has a scientific mind and a load of jars, all containing poisons which he has manufactured from plants in the garden - his favourite being Thornapple. When cousin Mirabel and her baby come to stay, James is captivated by Mirabel, who has been rejected by her boyfriend. Mirabel's aunt June, who had also rejected her, suddenly puts her into her good books again, but when June dies, supposedly of gastric complications and leaving Mirabel a large sum of money, James has his doubts as to the true cause of death.

When Cecily Branksome retires back to her old home town over her husband's objections she becomes involved with her boorish old boyfriend and a 30 year old murder.

A middle-aged man is still haunted by a love affair from his youth which almost ended in murder.