Watch Shark Week Season 29 Episode 13 Online

There's been a war going on between seal and great whites for millions of years. Now there's a new battleground on the map called Cape Cod. It's different in every way from the usual rocky islands where sharks and seals usually face off in other parts of the world. The great whites have had to learn new ways to hunt seals here. Dr. Greg Skomal and his team wonder, what are the sharks doing here, how do they get here, and how do more sharks learn of Cape Cod's bounty of seals? And more importantly: if the number of seals and sharks continue to increase at the present rate, what's the future?