The grand opening of Pryde Castle ends in disaster when a guide is struck by an arrow. Contrary to Inspector Sullivan, Father Brown becomes convinced that the motive lies buried in the family's past.
Quest roles:
Keith Osborn(Sergeant Albright), Robert Boulter(Alan Archer), Marcia Warren(Miss Audrey Diggle), Richard Hope(Sir St. John Pryde), Caroline Blakiston(Lady Lavinia Pryde), Susannah Fielding(Bunty Pryde), Angus Imrie(Jago Pryde), Guy Williams(Arthur Danby)