"Killer Whales" are not whales at all - they're actually dolphins. They rule the seas, yet we know very little about them. As recently as the 1970's, US Navy manuals warned that Orcas were so ferocious that they will attack human beings at every opportunity. Seldom has anyone dared to confront the killers in their own domain. Few have got as close to them as this. In this unique programme, Ingrid Visser is peeling back the mystery to challenge many of our strongest beliefs. Follow along on a five-year study of New Zealand's killer whale population. This beautiful documentary explores why Orcas strand themselves, their family ties, migration schedule and favourite foods. Viewers will also learn how to identify individual animals by their markings.