(RNS) Trapdoors, secret chambers and mysterious torch-lit beach rituals. The eighth episode of “Dig,” the Holy Land conspiracy thriller that aired Thursday (April 23) on the USA Network, serves up all these classic elements of suspense. But that heady cocktail comes with a shot of religious history and biblical references that add context to what is already a complex plot involving cloned high priests, murderous rabbis and the cutest little red heifer ever genetically engineered on a Danish farm.