In Mexico, legends swirl around El Demonio Negro, a 50-foot shark that has terrorized fishermen and tourists alike for generations. Is this an undiscovered predator? Forrest Galante hunts for answers in the most rugged and remote parts of the Baja Peninsula.

As the Shark Vortex retreats in the fall, sharks battle it out for dominance in New England's icy waters. Experts brave rough oceans and fierce predators to capture new footage and insight of the phantom shark and reveal which shark reigns supreme.