The Mazarin Stone, a famous jewel, acts as a magnet for crime. Holmes investigates the latest and perhaps most curious episode in its adventures.
Quest roles:
Charles Gray(Mycroft Holmes), Helen Ryan(Mrs McFarlane), Denis Lill(Inspector Bradstreet), Phyllis Calvert(Agnes Garrideb), Jon Finch(Count Sylvius), James Villiers(Lord Cantlemere), Gavin O'Herlihy(John Garrideb / James Winter), Richard Caldicot(Nathan Garrideb), Harry Landis(Ikey Sanders)