The Discovery Channel, which has bought the series, with its ground-breaking cinematography, for the American market, has decided only to air the first six episodes. The seventh episode focuses on the threat posed by man on the planet and the natural world. Narrator Sir David features heavily in the last episode, and the BBC have said foreign networks could choose to ignore it, and has repackaged it as an optional extra.
The BBC feel David Attenborough is not well known outside the UK, and translation of the 85-year-old narrator's strong presence would prove challenging for foreign networks. Sir David authored and presents the episode called, "On Thin Ice". More than 30 countries have already purchased the multi-million pound series but 10, as yet unnamed countries, have dropped the seventh episode which looks at how the planet's ice is changing and what it means to the animals and people at the Poles and the rest of the planet, reports Daily Mail
. Discovery Channel was involved in the making of the series, but have cited "scheduling issues" as the reason for the censor. Environmental campaigners said the decision not to incorporate the episode on global warming as part of the main package was “unhelpful”, reports the Telegraph
, which cost £16m ($29m) to make and took four years of filming to the small screen, will sell the package in the six-episode format to countries sceptical of climate change, giving them the choice to censor the episode should they wish. China is one of the countries who have purchased the show but it's not known if the world's biggest polluter has opted to include the final episode or not.