The episode discusses plate tectonics and geologic time, highlighting the work of James Hutton, Alfred Wegener, Harry Hess, Allan V. Cox, Brent Dalrymple, Frederick Vine, and Drummond Matthews, and discussing how geologists study layers of rock to read billions of years of the Earth's history.

The episode discusses major new revelations about the oceans.

The episode examines the complexities of the Earth's climate.

Using special effects and actual footage from space to illustrate other worlds in the Solar System, the episode discusses the connections between the Earth and the cosmos.

The episode focuses on the Earth's natural resources, including minerals such as copper, gold, silver, and platinum; fossil fuels such as petroleum, coal, and peat; and soil.

The episode explores the Earth's relationship with the Sun.

The episode explores the role of life in shaping the Earth and discusses the planet's possible future.