David Attenborough talks to Jeff and Sue Turner to find out how they managed to follow - and film - a pack of wolves on foot, carrying equipment and two children in the snow-covered plains of Wood Buffalo national park, Canada. A rerun of the film they made follows immediately.
Wildlife Special: Wolves and Buffalo - an Ancient Alliance
Over a two-year period, the Turners use exceptional field craft, persistence and patience to reveal the inter-related lives of wolves and buffalo.
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(The series concludes tomorrow at 12.40pm)