Significant marine pollution and algal bloom outbreaks are creating eerie dead zones in North America's most biodiverse estuary. Dr. Tiara Moore, along with Dr. Craig O'Connell, explores whether Bull Sharks can persist in the Indian River Lagoon, a vital nursery, despite the oxygen-depleted waters. Her mission could unlock the secrets to shark survival in changing oceans.

A South Pacific paradise has become a shark attack hot spot with Bull, Tiger, and Great White sharks moving closer and closer to the resort beaches, fatally attacking seven people in the last five years. Dr. Riley Elliot, Paul De Gelder, and Kori Burkhardt conduct experiments to identify the species responsible and find out why they are attacking.

In Indonesia's Raja Ampat Islands, a team of researchers hunt for one of the region's last living leopard sharks. But as they venture deeper into the unknown, the journey brings them face to face with some of the weirdest and wildest sharks on earth.