The investigative skills of Holmes and Watson are in top form in three challenging cases: "The Red-Headed League," which involves nabbing one of London's most daring criminals, "The Adventure of the Priory School," which sees a plan to kidnap a young lord result in tragedy, and "The Adventure of the Blue Carbuncle," which leads the detective team to discover a gemstone belonging to the Countess of Morcar. Read by Edward Hardwicke.