Leopards are renowned as one of the world's most elusive and resourceful predators, and in Mumbai - one of the biggest cities on earth - they are hunting people. Gordon Buchanan travels to India to find out why. Between 2001-2006, 57 people were killed on the outskirts of this megacity, by leopards. Gordon travels to a green jungle within this urban jungle: Sanjay Gandhi National Park, a protected wilderness within the city limits. Episode 2 of 4 season 1.