Planet Earth is a seven-episode 1986 PBS television documentary series focusing on the Earth, narrated by Richard Kiley.

Planet Earth explores geoscience and how discoveries of the early and mid-1980s were revolutionizing mankind's understanding of the Earth's past, present, and future. It also highlights scientific discoveries not yet fully understood and still under study in the mid-1980s. The series explores the Earth's origins, history, and structure; the forces that operate continually to alter its surface; its oceans; its climate; its natural resources; its biosphere and the effects of life on the physical world; its relationship to the Sun and other bodies in the Solar System; and its possible future in the face of pressures the growing human population places on the natural world.

The BBC used the same title for its 2006 series, but the two series are completely unrelated and quite different in focus and content.