2006 - 1The Life and Times of El Niño Jan. 03, 2006- 2006 - 2Space Tourists Jan. 12, 2006
- 2006 - 3Waiting for a Heartbeat Jan. 19, 2006
- 2006 - 4A War on Science Jan. 26, 2006
- 2006 - 5The Lost City of New Orleans Feb. 02, 2006
- 2006 - 6Most of Our Universe Is Missing Feb. 09, 2006
- 2006 - 7Winning Gold in 2012 Mar. 18, 2006
- 2006 - 8The Woman Who Thinks Like a Cow Jun. 08, 2006
- 2006 - 9The Genius Sperm Bank Jun. 15, 2006
- 2006 - 10Bye Bye Planet Pluto Jun. 22, 2006
- 2006 - 11We Love Cigarettes Jun. 29, 2006
- 2006 - 12Nuclear Nightmares Jul. 13, 2006
- 2006 - 13Tutankhamun's Fireball Jul. 20, 2006
- 2006 - 14Survivor's Guide to Plane Crashes Oct. 03, 2006
- 2006 - 15Chimps are People Too Oct. 10, 2006
- 2006 - 16The World's First Face Transplant Oct. 17, 2006
- 2006 - 17Human v2.0 Oct. 24, 2006
- 2006 - 18The Great Robot Race Oct. 31, 2006
- 2006 - 19Pandemic Nov. 07, 2006