The Chalgrove Brook is a chalk stream that rises in the Chiltern Hills and flows through the Oxfordshire countryside providing an important ecosystem for local wildlife - but the stream is now under threat
Taken from the wild in Malaysia as a baby, Billy was transported to Los Angeles Zoo. There he was cruelly trained to do tricks to amuse the visitors.
Thirty years later, having led a mostly solitary life in the zoo, Billy exhibits symptoms of mental and physical distress.
This powerful film foll...