Sir David Attenborough, one of Great Britain's best known natural history filmmakers, will finish up the Frozen Planet TV miniseries in a final episode exploring the ominous future of polar bears. Attenborough, 85, visits the North Pole for the first time in the last episode and tracks polar bears by helicopter, witnessing firsthand a tranquilized, underweight animal struggling to find food.

The popular series has enlightened BBC viewers about the impacts of climate change on the Poles through Attenborough travels to both the North Pole and Antarctica, and will enlighten viewers even further in its grand finale. According to Attenborough, the North Pole could potentially be free of ice by 2020, forcing polar bears to go hungry because of their reliance on the ice to hunt seals.

Controversial discussion stirred in the U.S. after reports revealed that the Discovery Channel may not include "On Thin Ice," the last segment of the seven-part series, in the U.S. version. The issue sparked concern from activists that Americans will not see the full harm of global warming and its potential threat to the existence of polar bears.

According to a report from the LA Times, the educational U.S. channel has decided to run the series in its entirety, premiering on March 18 and airing on following Sundays.