The Mystery Of Al Capone's Vault
In a 1986 nationally broadcasted television special entitled, "The Mystery of Al Capone's Vault", journalist Geraldo Rivera lead a digging team to an old Chicago Hotel where notorious ganster Al Capone once lived. There they began to dig through the cellar hoping to find something of note (perhaps guns, dead bodies, old barrels of whiskey, etc.). The special was widely watched and very suspenseful, but Geraldo and his team ended up finding nothing of significance.
In this episode, when it appears Horton has found absolutely nothing in the haunted house, Sam says, "Hey, the show's dragging. They're afraid it's going to be another Al Capone's Vault". The character name, "Horton Rivers" is somewhat of a combination of the names "Geraldo Rivera" and the star of the episode, "Morton Downey, Jr."