Mind-numbing fantasy derived from Greek legends about heroic Perseus, who slays the snake-haired Medusa and rescues a semi-clad maiden from the monstrous Kraken. Wooden Hamlin plays Perseus and fares better than more accomplished Olivier and Smith, who seem in need of enemas as they lurch about Mt. Olympus. Only Bloom seems truly godlike in a supporting role. Some good, some wretched special effects from pioneer Harryhausen.