What happens when two or more apex predators come head to head? In this episode, Killer Instincts explores the relationship between some of the world's fiercest hunters: lions and hyenas, sperm whales and giant squid, and tiger sharks, great white sharks, and killer whales. By studying how these heavyweights co-exist--and fight to the death--we can learn much about the brutal balance that rules the natural world.

What happens when two or more apex predators come head to head? In this episode, Killer Instincts explores the relationship between some of the world's fiercest hunters: lions and hyenas, sperm whales and giant squid, and tiger sharks, great white sharks, and killer whales. By studying how these heavyweights co-exist--and fight to the death--we can learn much about the brutal balance that rules the natural world.