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Before Zoboomafoo and long before Wild Kratts, two brothers in shorts groomed baby chimps and took pratfalls into the water for PBS. Kratts' Creatures ran for a single summer in 1996, and every one of its 50 episodes got rerun for years.
Eleven episodes, five years of filming, and one planet showing off. The BBC's 2006 landmark was the first nature documentary series the corporation shot in high definition, and it turned nature TV into event television — the show everyone bought an HDTV to justify, narrated by David Attenborough (or, if you watched it on Discovery, Sigourney Weaver).