Sezon 4
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1 Tropics: Rubber 23 Eyl 1985 2 Tropics: Metals 24 Eyl 1985 3 Tropics: Rice 25 Eyl 1985 4 Tropics: Working Animals ￃﾢ￢ﾂﾬ￢ﾀﾜ Monkeys and Elephants 26 Eyl 1985 5 Tropics: Endangered Animals 27 Eyl 1985 6 Light: From the Sun; To Your Eyes 30 Eyl 1985 7 Light: Color 1 Eki 1985 8 Light: Eyes 2 Eki 1985 9 Light: How Animals See 3 Eki 1985 10 Light: Bending and Bouncing 4 Eki 1985 11 Farms: Sheep and Pigs ￃﾢ￢ﾂﾬ￢ﾀﾜ Selective Breeding 7 Eki 1985 12 Farms: Plants and Pigs – Plant Production 8 Eki 1985 13 Farms: Hybrids 9 Eki 1985 14 Farms: Cows and Pigs ￃﾢ￢ﾂﾬ￢ﾀﾜ Animal Products 10 Eki 1985 15 Farms: Chickens and Pigs ￃﾢ￢ﾂﾬ￢ﾀﾜ Animal Production 11 Eki 1985 16 Stuff: Metals 14 Eki 1985 17 Stuff: Clay 15 Eki 1985 18 Stuff: Shaping It 16 Eki 1985 19 Stuff: Feathers and Rubber 17 Eki 1985 20 Stuff: Using It 18 Eki 1985