BIRMINGHAM, England — Spoiler alert: Something bad is about to happen on “The Archers.”

Something bad — or harrowing or heartwarming — is always about to happen on “The Archers,” a preposterously popular daily BBC radio soap opera that marks its 75th anniversary this month. People fall off roofs, roofs fall on people, tractors overturn, young women get pregnant (sometimes by accident) and young men get married (sometimes to other men).