#4. Planet Earth
This breathtaking American presentation of a British nature miniseries was remarkable for high- and low-minded reasons: It was a vivid argument for preserving Earth's biodiversity, and a great justification for getting a big-screen TV. Especially staggering in HD, the 11 episodes traveled from pole to pole, from the peaks of mountains to underwater caverns to capture nature as rarely seen by humans. While it didn't have an explicitly environmentalist argument, by showing the planet's complex weave of life and natural processes, it was possibly TV's most moving work of eco-tainment yet.
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