Fewer than 4,000 wild tigers remain in the world. As one of Earth's most iconic animals battles for its survival, one country --- India --- holds the key.In what is the largest wildlife survey ever conducted in the history of the world, India will look to take stoke of their tiger count. The results of the survey are monumentally important for the fate of the tiger around the world: if numbers go up, there is hope that we can save this majestic creature. If they go down, it may spell the end. Join the camera crew as they receive unprecedented access to follow the survey across 50 tiger reserves and 400,000 kilo metres in search of most elusivepredatoron Earth: the tiger.