Brutal currents and jellyfish stings make Japan the most challenging dive yet — but the prospect of seeing a sharknado keeps the group's spirits afloat.

Low visibility and an imminent elimination create choppy competition in South Africa. Still, the teams are determined: Will they find a great white?

With a game-changing bonus in play, the teams head to Bimini. Amid lemon sharks and an epic hammerhead sighting, one expert bravely faces their fears.

The finalists duke it out in the Galápagos, a shark-rich hotspot. Can they snap a photo of an ultra rare whale shark — or will a killer get in their way?