Maria Gibson, the wife of a gold-mining millionaire, is found shot dead at their country house. Gibson asks Holmes to find his wife's killer and thus to clear the name of his children's governess, Miss Dunbar, who has been charged with the crime. Is Gibson acting as a kindly employer, and what are the hidden depths of the case?

• Arthur Conan Doyle
• John Hawkesworth
• Michael Cox

• Sophie Thompson
• Denys Hawthorne
• Vernon Dobtcheff