A forest ranger researching black bears finds several pieces of her equipment have been tampered with, and hair found at the scene is found to be unidentifiable; she encounters a poacher who is later killed by a large, unidentified creature.

Terror lurks beneath the surface of Utah's Bear Lake in the form of a creature equally at home on land as in the murky depths of the lake; a lakeside celebration becomes a terrifying fight for survival as the monster begins to feed.

An experienced golf ball diver is attacked by a territorial, 400-pound alligator in Tampa; a man snorkelling is dragged under by a 12-foot saltwater crocodile; in Africa, an experienced guide is attacked by a hippopotamus intent on defending its turf.

Jon Lien and Deborah Tobin have each dedicated their lives to saving Atlantic Ocean whales from certain death when they become entangled in fishermen's nets.

Think "Invasion of the Body Snatchers" in the Everglades as burmese pythons, king cobras, monitor lizards, piranhas and other deadly creatures invade the U.S. through Florida.