1. Heroes of the High Frontier

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. 30 January 1999

Looks at the brief history of rain forest research.

2. Dolphins: The Wild Side

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. 13 February 1999

Follows dolphins as they fight for mates, hunt food, and clash with other dolphin species.

3. Hidden World of the Bengal Tiger

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. 10 April 1999

A look at one tigress's struggle to raise cubs and survive in the wild.

4. Avalanche: The White Death

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. 2 May 1999

Talks about understanding and surviving the lethal phenomenon known as the avalanche.

5. Tempest from the Deep

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. 3 October 1999

Depicts the impact a hurricane had on California's marine mammals and kelp forests.

7. Lost Ships of the Mediterranean

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. 25 December 1999

Off the coast of Israel, the oldest shipwrecks ever found in the Mediterranean offer clues to an ancient biblical civilization.