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- 1Running for Their LivesJanuary 6, 1991
- 2Scandinavia, Lands of the Midnight SunJanuary 13, 1991
- 3Scandinavia, Fresh Waters, Salt SeasJanuary 20, 1991
- 4The Cat That Came In from the ColdJanuary 27, 1991
- 5Portrait of the PlanetFebruary 3, 1991
- 6Two Weeks to Save the PlanetFebruary 10, 1991
- 7Cranes of the Grey WindFebruary 17, 1991
- 8Even the Animals Must Be FreeMarch 3, 1991
- 9Marathon BirdsMarch 10, 1991
- 10The Great Karoo, A Secret AfricaMarch 17, 1991
- 11Big Oil, In the Wake of Exxon ValdezMarch 24, 1991
- 12Wings Over the Holy LandMarch 31, 1991
- 13Hawaii, Beyond the Feathered GodsApril 14, 1991