Grand Canyon
Episode: 2008-02-11 | Airdate: Feb 11, 2008
Episodes
The Rockies
Episode: 2008-02-28 | Airdate: Feb 28, 2008
Birth of America
Episode: 2008-03-06 | Airdate: Mar 6, 2008
Birth of Life
Episode: 2008-03-13 | Airdate: Mar 13, 2008
Pluto Rediscovered
Episode: 2008-03-20 | Airdate: Mar 20, 2008
Mars: Waterworld
Episode: 2008-05-25 | Airdate: May 25, 2008
Saturn's Secrets
Episode: 2008-05-25 | Airdate: May 25, 2008
Asteroid Alert
Episode: 2008-05-27 | Airdate: May 27, 2008
First to Cross the Ocean
Episode: 2008-08-28 | Airdate: Aug 28, 2008
The incredible skills, resources, and ingenuity required of the earliest seafaring societies in Southeast Asia, the Viking explorers of Europe, and the Polynesians trying to become the first humans to cross the open ocean are examined in this episode. (This episode is also referred to as "First Mariners" on some unofficial sources.)
Time Machine
Episode: 2008-09-11 | Airdate: Sep 11, 2008
Earth's Invisible Shield
Episode: 2008-09-18 | Airdate: Sep 18, 2008
Big Bang
Episode: 2008-09-25 | Airdate: Sep 25, 2008
Hubble's Amazing Universe
Episode: 2008-10-05 | Airdate: Oct 5, 2008
Supercontinent
Episode: 2008-10-09 | Airdate: Oct 9, 2008
Giant Crystal Cave
Episode: 2008-10-12 | Airdate: Oct 12, 2008
Death of the Universe
Episode: 2008-10-16 | Airdate: Oct 16, 2008
Who Killed the Aztecs?
Episode: 2008-11-13 | Airdate: Nov 13, 2008
Five Years on Mars
Episode: 2008-11-02 | Airdate: Nov 2, 2008