1. Down to Earth

August 28, 2008 - 6:00 pm Eastern

2. The Restless Planet

August 28, 2008 - 6:00 pm Eastern

3. Earth's Interior

August 29, 2008 - 6:00 pm Eastern

4. The Sea Floor

August 29, 2008 - 6:00 pm Eastern

5. The Birth of a Theory

August 30, 2008 - 6:00 pm Eastern

6. Plate Dynamics

August 30, 2008 - 6:00 pm Eastern

7. Mountain Building

August 31, 2008 - 6:00 pm Eastern

8. Earth's Structures

August 31, 2008 - 6:00 pm Eastern

9. Earthquakes

May 7, 2008 - 4:00 pm Eastern
September 1, 2008 - 6:00 pm Eastern

10. Geologic Time

May 7, 2008 - 4:00 pm Eastern
September 1, 2008 - 6:00 pm Eastern

11. Evolution Through Time

May 7, 2008 - 7:00 pm Eastern
May 14, 2008 - 4:00 pm Eastern
September 2, 2008 - 6:00 pm Eastern

12. Minerals: The Materials of Earth

May 7, 2008 - 7:00 pm Eastern
May 14, 2008 - 4:00 pm Eastern
September 2, 2008 - 6:00 pm Eastern

13. Volcanism

May 14, 2008 - 7:00 pm Eastern
May 21, 2008 - 4:00 pm Eastern
September 3, 2008 - 6:00 pm Eastern

14. Intrusive Igneous Rocks

May 14, 2008 - 7:00 pm Eastern
May 21, 2008 - 4:00 pm Eastern
September 3, 2008 - 6:00 pm Eastern

15. Weathering and Soils

May 21, 2008 - 7:00 pm Eastern
May 28, 2008 - 4:00 pm Eastern
September 4, 2008 - 6:00 pm Eastern

16. Mass Wasting

May 21, 2008 - 7:00 pm Eastern
May 28, 2008 - 4:00 pm Eastern
September 4, 2008 - 6:00 pm Eastern

17. Sedimentary Rocks: The Key to Past Environments

May 28, 2008 - 7:00 pm Eastern
June 4, 2008 - 4:00 pm Eastern
September 5, 2008 - 6:00 pm Eastern

18. Metamorphic Rocks

May 28, 2008 - 7:00 pm Eastern
June 4, 2008 - 4:00 pm Eastern
September 5, 2008 - 6:00 pm Eastern

19. Running Water I: Rivers, Erosion and Deposition

June 4, 2008 - 7:00 pm Eastern
June 11, 2008 - 4:00 pm Eastern
September 6, 2008 - 6:00 pm Eastern

20. Running Water II: Landscape Evolution

June 4, 2008 - 7:00 pm Eastern
June 11, 2008 - 4:00 pm Eastern
September 6, 2008 - 6:00 pm Eastern

21. Groundwater

June 11, 2008 - 7:00 pm Eastern
June 18, 2008 - 4:00 pm Eastern
September 7, 2008 - 6:00 pm Eastern

22. Wind, Dust and Deserts

June 11, 2008 - 7:00 pm Eastern
June 18, 2008 - 4:00 pm Eastern
September 7, 2008 - 6:00 pm Eastern

23. Glaciers

June 18, 2008 - 7:00 pm Eastern
June 25, 2008 - 6:00 pm Eastern
September 8, 2008 - 6:00 pm Eastern

24. Waves, Beaches and Coasts

June 18, 2008 - 7:00 pm Eastern
June 25, 2008 - 6:00 pm Eastern
September 8, 2008 - 6:00 pm Eastern

25. Living With Earth, Part I

June 25, 2008 - 7:00 pm Eastern
September 9, 2008 - 6:00 pm Eastern

26. Living With Earth, Part II

June 25, 2008 - 7:00 pm Eastern
September 9, 2008 - 6:00 pm Eastern