Shark Week veteran Dr. Riley Elliott has traveled all over to study great whites, which are now terrorizing the beaches of New Zealand. He sets out alongside his wife Amber Jones to find answers to protect his loved ones from the apex predators before it's too late.

Twelve-foot-long monster mako sharks compete head-to-head with great whites for prey off the coast of California. Using a custom clear, acrylic diving bell, Dr. Austin Gallagher and legendary free diver Andre Musgrove get up close with both predators and track makos breaching eight feet out of the ocean.

Tiger sharks are washing up dead on the beaches of Western Australia with no sign of attack. Forrest Galante has a theory that deadly sea snakes are turning these apex predators to prey. In the battle of shark against snake, are snakes winning?