Dr. Riley Elliott returns to Australia's Norfolk Island with underwater cinematographer Kina Scollay to see what happens when the island's tiger sharks go head-to-head with migrating great whites over an unusual food source: cow carcasses.
Shark expert Kina Scollay and his elite team return with a unique one-person submersible, the Mechashark, to a top secret location off New Zealand attempting to do something that's never been done: locate a great white shark mating ground.
In New Zealand, shark experts simulate epic battles between great whites and 60-foot leviathan, studying orca tactics to find the ultimate predator.
Sharktopia - Shar Week
Researchers investigate whether orcas have begun hunting great white sharks off the coast of New Zealand.
