 The show aired live in the USA in April 1986 garnering one of the  highest ratings in US television history. Nielsen recorded a 34  average rating and 48 average share in eight markets, and a 57  rating and 73 share in the Chicago market. Rivera hosted the show  which was to climax with the opening of a "secret vault" inside the  bowels of the Lexington Hotel in Chicago, supposedly revealing Al  Capones treasure or possibly human remains. Internal Revenue  Service Agents and a medical examiner stood at the ready should any  cash or corpse lay inside. When demolition crews finally made their  way inside the only contents were a dirt pile and a bottle of  bathtub gin. The hype generated a record rating of 57 with an  estimated audience of 30,000,000. The term "Al Capones Vault" has  come to mean any over