Shark expert and scientist Dr. Riley Elliott is ready to give someone a leap ahead in the competitive world of shark research; during a six-week crash course on sharks, eight rookies are put to the test for a coveted spot on Riley's team.

The recruits are challenged to free dive, with no oxygen tanks, with a shark swarm.

The recruits must prove they have what it takes to handle Bull Sharks which can be aggressive.

The recruits are put under pressure when they are thrown into a shipwrecked survival situation.

It's hammerhead time as the recruits encounter one of the world's largest sharks.

In their final and hardest challenge the recruits face Tiger Sharks, which are apex predators.