National Geographic: Crocodile King

The largest reptile on earth is lurking in the rivers of Australia's Northern Territory. A master predator, each year this cunning croc is tested by nature's harsh extremes and must battle for dominance with its own kind. Using high-speed cameras and infrared technology, National Geographic reveals how this stealthy "salty," with senses and instincts honed over the ages, is able to retain King Croc status.