Debut: A science series examining the forces that have shaped “our ever-changing planet.” The opener shows Earth's crust to be made up of continuously moving plates that sometimes collide, causing changes in the landscape. Also: a discussion of San Francisco's 1906 earthquake. Richard Kiley is the narrator.

An oceanographic survey examines the 50-mile-wide Gulf Stream, which flows along the Gulf of Mexico and up the Eastern seaboard. Included: sea creatures such as giant salad-plate clams, and tulip worms that thrive in ocean-floor cracks.

The debate over the earth's atmospheric future. Some believe that variations in the planet's orbit will result in another Ice Age, while others maintain that a greenhouse effect will cause a period of increased global temperatures.

How events in space may have influenced the origin and evolution of Earth. Included: comparisons of Earth's climate and movement with other planets. Also: footage of the moon, Jupiter, Mars and Venus.

Technological advances that enable scientists to extract natural resources from the earth. Included: petroleum geologists in the Sudanese desert; oil exploration in the North Atlantic; platinum mining in southern Africa.

Shedding light on recent theories about the sun's history and relationship with Earth. Included: sunspots, the aurora borealis and solar wind

The “fate of the Earth,” says narrator Richard Kiley, is clouded by the threat of nuclear annihilation and the continuing destruction of vital ecosystems. Included: theories on the possible effects of radiation-filled dust, including plunging global temperatures.