Overview: With incredible underwater footage, David Attenborough reveals the true nature of the hippopotamus – an animal that cannot swim yet is utterly dependent on water.
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First Air Date: Oct 30, 1983Last Air date: Mar 20, 2020Season: 39 SeasonEpisode: 543 EpisodeRuntime: 60 minutesQuality: HDIMDb: 7.00 / 10 by 22 usersPopularity: 61.518Language: English