Four festive families from across the country showcase their spectacular displays, including the Birkett family, whose home includes a self-built mine shaft filled with holiday spectacles and surprises, along with a colossal 3-story castle in Scottsdale, Arizona; the Gress family, whose display features a blow mold overload in Union Beach, New Jersey; the Latchford family, whose 5-acre farm holds restored mechanical figures, repainted cut-outs, a tunnel of ornaments and more in Callao, Missouri; and the Shoaf family, whose display uses binder clips to keep their mix of 115,000 incandescent and LED lights in perfect position in Durham, North Carolina. Judge Carter Oosterhouse decides who will walk away with $50,000 and the coveted Light Fight trophy.