Most wildlife documentaries focus on animal behavior but INSIDE NATURE'S GIANTS goes inside the largest animals on the planet to explore their anatomy reveal their intricate inner workings and uncover their evolutionary secrets. In this episode veterinary scientist Mark Evans and comparative anatomist Joy Reidenberg fly to New Zealand to join a team of experts dissecting a rare specimen of a Giant Squid and a bizarre octopus that inhabits the ocean's "midnight zone" over half a mile deep. From the moment they set eyes on these cephalopod cousins and their alien anatomy the team is fascinated. Once thought to be the stuff of legend it was only in the late 19th century that the Giant Squid-the largest invertebrate in the world-was first officially recorded by scientists. Now thanks to the dissection the team can piece together the puzzle of how Giant Squid hunt how they jet through the water how their quick-fire beak pulverizes food why it has such enormous eyes and the brutal truth about Giant Squid reproduction.