| Episode # |
Original
Air Date |
Titles |
| |
| Season 1 |
| |
| 1. | 1-1 | 25 Jan 05 | Mirror Neurons, Hurricanes, |
| 2. | 1-2 | 19 Apr 05 | Little People of Flores, T. rex |
| 3. | 1-3 | 26 Jul 05 | Fuel cells, RNAi, Fastest Glacier |
| 4. | 1-4 | 18 Oct 05 | Artificial Life, Lightning |
| 5. | 1-5 | 10 Jan 06 | 10th Planet, Twin Prime Conjecture, Ivory-Billed Woodpecker, Pandemic Flu, Lab Meat?, Stem Cells |
| |
| Season 2 |
| |
| 6. | 2-1 | 03 Oct 06 | Asteroid, Island of Stability, Obesity |
| 7. | 2-2 | 21 Nov 06 | 1918 Flu, Mass Extinction, Papyrus |
| 8. | 2-3 | 09 Jan 07 | Aging, Space Elevator, Maya |
| 9. | 2-4 | 10 Jul 07 | Sleep, CERN, Emergence |
| 10. | 2-5 | 24 Jul 07 | T. Rex Blood?, Epigenetics, Kryptos |
| |
| Season 3 |
| |
| 11. | 3-1 | 25 Jun 08 | Dark Matter, of Mice and Memory |
| 12. | 3-2 | 02 Jul 08 | Personal DNA Testing, Art Authentication, Capturing Carbon |
| 13. | 3-3 | 09 Jul 08 | Saving Hubble, First Primates |
| 14. | 3-4 | 16 Jul 08 | Bird Brains, Space Storms |
| 15. | 3-5 | 23 Jul 08 | Leeches, The Search for ET, Stem Cells Breakthrough |
| 16. | 3-6 | 30 Jul 08 | Phoenix Mars Lander, Brain Trauma, Mammoth Mystery |
| |
| Season 4 |
| |
| 17. | 4-1 | 30 Jun 09 | Diamond Factory, Anthrax Investigation, Auto-Tun |
| 18. | 4-2 | 07 Jul 09 | Hunt for Alien Earths, Art Authentication |
| 19. | 4-3 | 14 Jul 09 | Marathon Mouse, Dinosaur Plague |
| 20. | 4-4 | 21 Jul 09 | Picky Eaters, Capturing Carbon, Sea Lions and Walruses |
| 21. | 4-5 | 28 Jul 09 | Moon Smasher, Secrets in the Salt, Bird Brains |
| 22. | 4-6 | 18 Aug 09 | Public Genomes, Algae Fuel, Arctic Ocean Seafloor |
| 23. | 4-7 | 25 Aug 09 | Saving Hubble Update, Gangster Birds |
| 24. | 4-8 | 01 Sep 09 | Sleep, First Primates, Earthquakes in the Midwest |
| |
| Season 5 |
| |
| 25. | 5-1 | 19 Jan 11 | Can We Make It to Mars? |
| 26. | 5-2 | 26 Jan 11 | Can We Live Forever? |
| 27. | 5-3 | 02 Feb 11 | How Does the Brain Work? |
| 28. | 5-4 | 09 Feb 11 | How Smart Are Animals? |
| 29. | 5-5 | 16 Feb 11 | Where Did We Come From? |
| 30. | 5-6 | 23 Feb 11 | What's the Next Big Thing? |
| |
| Season 6 |
| |
| 31. | 6-1 | 10 Oct 12 | What Makes Us Human? |
| 32. | 6-2 | 17 Oct 12 | Can Science Stop Crime? |
| 33. | 6-3 | 24 Oct 12 | How Smart Can We Get? |
| 34. | 6-4 | 31 Oct 12 | Can I Eat That? |
| 35. | 6-5 | 07 Nov 12 | What Are Animals Thinking? |
| 36. | 6-6 | 14 Nov 12 | What Will the Future Be Like? |
| |
