Prehistoric Planet 1x3 Freshwater Season 1 Season 0 5 EpisodesSeason 1 5 Episodes 1x1 - Coasts 1x2 - Deserts 1x3 - Freshwater 1x4 - Ice Worlds 1x5 - Forests With its feathered body and duck bill, the eight-ton Deinocheirus wades through an Asian wetland in search of relief from pesky biting flies.