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Natural World

2011-2012

Episode 5: The Woman Who Swims with Killer Whales

Duration: 1 hour

on BBC Four

Dr Ingrid Visser investigates why there has been an unusual number of whale deaths, and reveals disturbing new information. Show more

BBC Four

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BBC Four reflects arts, music and culture with an ambitious range of intellectually and culturally enriching programmes, taking an expert and in-depth approach to its subjects.