When never-before-seen footage surfaces of a pack of orcas killing a great white, Dickie Chivell springs into action, building an underwater habitat called 'Shark House.'  His mission is to live on the sea floor for seven days, looking for the last remaining great white sharks in South African waters.

A team of researchers have discovered a mysterious group of mako sharks of the Gulf of Mexico who migrate around Florida and up to Rhode Island. They call these makos 'mavericks.' Now, the teams are trying to discover what sets them apart from other makos.

A new ocean phenomenon known as The Blob sends juvenile great white sharks straight into a feeding frenzy of monster 20-foot adults off Guadalupe Island. A team of shark experts dives deep to discover if the young sharks survive or become a snack.