The Kratt brothers live for two weeks on a boat off the coast of South Africa to swim with great white sharks and observe their hunting techniques off Seal Island, home to a colony of seals that runs the shark gauntlet every time its members take to the water. Whether in the boat or underwater, the brothers study the behavior of the great white as these fierce predators patrol the depths of ""Shark Alley"" to target inexperienced juvenile seals.
