4 - 1Death Stars Aug. 18, 2009
4 - 2The Day the Moon Was Gone Aug. 25, 2009
4 - 3It Fell From Space Sep. 01, 2009
4 - 4Biggest Blasts Sep. 08, 2009
4 - 5The Hunt for Ringed Planets Sep. 15, 2009
4 - 610 Ways to Destroy the Earth Sep. 22, 2009
4 - 7The Search for Cosmic Clusters Sep. 29, 2009
4 - 8Space Wars Oct. 06, 2009
4 - 9Liquid Universe Oct. 20, 2009
4 - 10Pulsars & Quasars Oct. 27, 2009
4 - 11Science Fiction, Science Fact Nov. 03, 2009
4 - 12Extreme Energy Nov. 10, 2009