The Reptiles: Alligators and Crocodiles looks at the ultimate predators at the margins of the water and the land. Some amuse us, others terrify us. They slither, swim, walk and crawl, leap and lunge, and some spend their entire lives contained within a shell. Their ranks include some of the most skillful predators on Earth. And their long-departed dinosaur ancestors are an unending source of fascination to humanity, both in fiction and scientific endeavor. They are “The Reptiles,” the fascinating subjects of a four-part NATURE miniseries. With guidance from leading experts on Alligators and Crocodiles, the first episode reveals that the world of these creatures is a lot more complex than we ever imagined. Some of the most surprising sequences reveal that the crocodile is not only the ultimate predator in the natural world but also a highly intelligent animal. The progam explores what the future holds for these living dinosaurs.