A tiger sits motionless, hidden. Then it starts to move--very slowly at first: one of the world's most tenacious predators is on the prowl. Birds, deer, monkeys run for cover. The tiger's legs drive it forward at high speed as it chooses its prey and relentlessly runs it down. It's a magical sight, pure power and speed. And we may be the last generation to witness it. These are truly dark days for the tigers of the world. One subspecies became extinct during the 1970s, another in the '80s. Today fewer than 5,000 Bengal tigers remain in the wild. Conservationist Anthony Marr feels a rear-mystical connection with tigers. "They get right into the core of my soul," he says. "It's a magical feeling just to know they exist." Largely shot in India's Bandhavgarh National Park, Bengal Tigers is a plea to save one of the world's most remarkable creatures. During the '70s, the international community came together to save the whales. Now it's time to save the tigers.