A cocksure TV bigshot faced with dwindling ratings installs America’s favorite news anchor as host of a popular reality show.   Meanwhile in Middle America, a houseful of roommates bickers over high-stakes real-world conflicts:  Merv doesn’t clean the bathroom.  Someone ate Alice’s yogurt.  And the rent is long past due.  Soon, as reality collides with reality TV, a sobering drama becomes sexy entertainment and we’re eyewitness to a crisis that holds the nation riveted.