Planet Earth (2006)
Five years in the making, and at the time in 2006, ranking as the most expensive nature documentary ever commissioned by the BBC, Planet Earth changed the way we look at the world around us. From microscopic observations of insect mandibles to underwater vistas most of us would never have seen in our earthbound existences, the high-definition miniseries turned scenes from the animal kingdom into Lord of the Rings. The years have seen sequels and spinoffs (The Blue Planet, The Hunt, Life, Africa, Frozen Planet, Planet Earth II, and Blue Planet II, all on Netflix, too), but the original, backed by David Attenborough's studious narration, holds up -- and you can watch it all in six hours.
Where to watch it: Netflix