The Deadly Seal

Father Brown hears a penitent in confessional declare that they are going to kill Bishop Talbot the next day during a shooting party organised by a theatrical producer. Unable to reveal what he has heard, Father Brown also attends the shoot and although saving the Bishop, the Bishop's Assistant Albert Davies is killed instead. Father Brown discovers a deadly pact involving a child abuse victim and the murdered man's wife to kill another man while providing unbreakable alibis.