The Magician's Apprentice (Doctor Who) Doctor's earlier incarnations, ranging from "Genesis of the Daleks" to "The Stolen Earth". Most notably, he shows footage (from "Genesis of the Daleks") of the Fourth Doctor asking the question "if someone who knew the future pointed out a child to you and told you that that child would grow up totally evil, to be a ruthless dictator who would destroy millions of lives, could you then kill that child?" Several different designs of the Daleks from across the series' history reappear in the episode, alongside their creator, Davros, and their home planet, Skaro. The first Dalek shown in the
Planet Earth (2006 TV series) whilst some international versions used alternative narrators. The series has eleven episodes, each of which features a global overview of a different biome or habitat on Earth. At the end of each fifty-minute episode, a ten-minute featurette takes a behind-the-scenes look at the challenges of filming the series. Ten years later, the BBC announced a six-part sequel had been commissioned, titled "Planet Earth II", the first television series produced by the BBC in Ultra-high-definition (4K). David Attenborough returned as narrator and presenter. In 2001 the BBC broadcast "The Blue Planet", a series on the natural history of the world's oceans.