Air date: 1989-10-08

Runtime: 53 min

The area's evolutionary roots opens this look at the African valley.

Air date: 1989-10-15

Runtime: 53 min

The wildlife that lives on the Great Rift's ash plains.

Air date: 1989-10-22

Runtime: 53 min

Examines the Red Sea, the island of Madagascar and East Africa.

Air date: 1989-10-29

Runtime: 53 min

Soft coral, sponges, tubeworms, anemones and giant cod adapt to life in Antarctica's subzero waters.

Air date: 1989-11-12

Runtime: 53 min

Profiles the wildlife living within the British crown colony of Hong Kong

Air date: 1989-11-19

Runtime: 53 min

An exploration of the Caledonian forest in Scotland, Britain's largest remaining area of ancient woodland.

Air date: 1989-12-10

Runtime: 53 min

A portrait of the endangered mountain gorilla in equatorial Africa.

Air date: 1989-12-17

Runtime: 53 min

A look at the maneating tigers of the Sundarbans delta in India.

Air date: 1990-01-07

Runtime: 53 min

Resource management in Italy's alpine Gran Paradiso National Park has consequences beyond the parks boundaries.

Air date: 1990-01-21

Runtime: 53 min

Scientists study sandhill cranes on Nebraskan plains, Alaskan and Siberian coasts and in the Northwest Territories.

Air date: 1990-02-04

Runtime: 53 min

The forests and waters of Ethiopia's Bale Mountains, may one day renew the country's depleted landscape.

Air date: 1990-02-11

Runtime: 53 min

A look at how Europe's birds of prey have adapted.

Air date: 1990-02-18

Runtime: 53 min

The relationship between working sheepdogs and flocks of sheep. Selective breeding yields a sheepdog with outstanding abilities to tend the creature other canines prey upon.

Air date: 1990-03-04

Runtime: 53 min

Tracing the course of the Colorado River.

Air date: 1990-03-11

Runtime: 53 min

Thousands of years of human settlement provide the backdrop by which to discover the wildlife of Ireland.

Air date: 1990-03-18

Runtime: 53 min

The fur trade continues to threaten the South American otter with extinction, despite its status as an endangered species.

Air date: 1990-03-25

Runtime: 53 min

Profiles the Haida Indians who live on British Columbia's Queen Charlotte Island.

Air date: 1990-04-01

Runtime: 53 min

An exploration of the environmental impact of man's attempts to halt the erosion of Presque Isle beaches.

Air date: 1990-04-08

Runtime: 53 min

The effect of the 1988 fire on the ecosystem of Yellowstone National Park.

Air date: 1990-04-15

Runtime: 53 min

A natural history of the snake includes its significance to man as a symbol of fertility, immortality and death.