This episode introduces viewers to the deadly world of the most feudal families, almighty monarchs, territorial clans and awesome armies of the animal kingdom. Holding the crown for the largest land carnivore in the world, polar bears feast like kings, eating all the seals they can. Male giraffes go head to head in epic neck-jousting battles over females. Sand tiger sharks wage wars in utero. Wildebeest warriors get the upper hand — and hoof — in one of the greatest wildlife migrations on earth. Watch how these creatures and other species duke it out in World's Deadliest: Game of Thrones.