Not all of nature's fiercest creatures are apex predators. In this episode, Killer Instincts brings you into the world of animals whose adaptations have made them uncontestable in their habitats: the king cobra, the jaguar, and the African hippopotamus. By mastering many killer instincts, these animals have earned their place as masters of their domain.

Not all of nature's fiercest creatures are apex predators. In this episode, Killer Instincts brings you into the world of animals whose adaptations have made them uncontestable in their habitats: the king cobra, the jaguar, and the African hippopotamus. By mastering many killer instincts, these animals have earned their place as masters of their domain.