The actor and his documentary team expose stories of crime and hardship around the world, beginning with sex trafficking in India. Ross visits the notorious red-light district of Mumbai, where secretly filmed footage reveals not only the scale of the industry but how young some of the girls trapped in it are. He also travels across country to West Bengal, meeting families whose daughters have been taken from them, and comes face to face with a sex trafficker who confesses to many shocking acts that leave the presenter and his team stunned

• Ross Kemp