A Dangerous Double-Program. Program 1: The Secret World of Sharks and Rays - For all their Hollywood-bred notoriety, sharks have been deeply mysterious, almost unknowable creatures until now. This compelling program goes below the surface to probe the long secret world of these sleek and sneaky predators. Despite the sharks familial ties to the saucer-like ray, youll find that in this unforgiving underworld, blood is no thicker than water. Program 2: White Shar/Red Triagle - They call is the red triangle, and with bloody good reason: many great white sharks prowl and probe here. But why do they choose these specific waters the coastal area between San Francisco and Monterey to practice their vaunted kill skills? This program follows sharks as they hunt for their favorite comfort food, the blubbery elephant seal.