Breeding critically-endangered Sumatran tigers, preparing for the arrival of a new baby elephant, and managing a feisty group of chimpanzees – it's all in a day's work for staff at the Zoological Society of London (ZSL). "It's not enough just to be passionate about animals and to love them. You've actually got to almost look inside their head. Anyone can dominate an animal through a cage but getting an animal to co-operate is extremely rewarding." - ZSL London Zoo senior keeper Tony Cholerton.The Zoo is a three-part factual series for ITV give viewers exclusive and compelling behind-the-scenes access to the lives of the animals and staff at ZSL London Zoo. Produced by Wild Pictures, the series offers a privileged and unique insight into the at times emotionally intense stories of keepers and their 20,000 charges at one of the world's oldest zoos at its base in Regent's Park and country estate at Whipsnade.