. Although this has been shown in the US before, this is the first time it will be be broadcast with the original narrator, world famous naturalist, Sir David Attenborough (Sigourney Weaver did the US version for The Discovery Channel). The Planet Earth marathon will start Saturday, April 21, 6:00am ET and continues through Sunday, April 22, 9:00PM ET/PT. The marathon will be followed by the world premiere of a new two-hour special, The Making of Planet Earth, at 9:00pm ET/PT. According to the official press release, you will now be able to go behind-the-scenes for an all-new eye-opening two-hour special, The Making of Planet Earth, which details the incredible adventures of the 21st century explorers who risked their lives to film in some of the most dangerous and remote places on Earth. Featuring exclusive interviews with the award-winning team behind the epic eleven-part series, including director and executive producer Alastair Fothergill, who has worked alongside Sir David Attenborough for over 25 years and is widely regarded as one of the world’s top wildlife filmmakers. Producers Vanessa Berlowitz and Huw Cordey, and leading cinematographer Doug Allan are all among those who discuss the secrets behind Planet Earth’s spectacular footage. Following the Earth Day weekend marathon, BBC America will air back-to-back episodes of Planet Earth at 8:00pm and 9:00pm ET/PT on Sundays beginning April 29. Following each week’s episodes, viewers can take an up close look at Planet Earth’s most amazing moments in four new specials dedicated to the world’s most fascinating wildlife. The Planet Earth series is re-imagined in these specials – portraying an astonishing range of animals in all corners of the planet and focusing on core aspects of animal behavior.