Polar Bears on Thin Ice. A film on how the polar bears of Canada's Hudson Bay are increasingly encroaching into the town of Churchill in their search of food as they wait for the bay to freeze over in autumn. Narrated by David Attenborough.
Producer Sue Flood; Series editor Sara Ford BBC WILDLIFE MAGAZINE: monthly. L2.80. May issue on sale 30 April Why the polar bear became sociable: page 33