Shark Week's Paul de Gelder teams up with Dr. Mark Meekan to travel to the sharkiest places in the world, Cobourg Penninsula in Northern Australia. They want to know what happens when 14-foot crocodiles moves into shark infested waters?

Greg Skomal & Joe Remeiro return to Shark Week to study the area that brings thirty species of sharks, the Gulf Stream. They will focus on three sharks that can out-swim, out-think, and out-compete all the others makos, great whites, and porbeagles.