This series introduces viewers to physical geology, the study of the geologic events that have shaped, and continue to change, or planet. "Down to Earth" introduces geoscience; "The Restless Planet" describes theories of the earth’s formation, "Earth’s Interior" looks at geophysics - indirect methods of studying the earth’s interior, and "The Sea Floor" shows techniques used to study the ocean floor. Produced and directed by Robert Lattanzio; host James Sad d. Series study guide available. Closed captioned.