Sezon 4
Bölümler
1 Death Stars 18 Ağu 2009 
2 The Day the Moon Was Gone 25 Ağu 2009 
3 It Fell From Space 1 Eyl 2009 
4 Biggest Blasts 8 Eyl 2009 
5 The Hunt for Ringed Planets 15 Eyl 2009 
6 10 Ways to Destroy the Earth 22 Eyl 2009 
7 The Search for Cosmic Clusters 29 Eyl 2009 
8 Space Wars 6 Eki 2009 
9 Liquid Universe 20 Eki 2009 
10 Pulsars & Quasars 27 Eki 2009 
11 Science Fiction, Science Fact 3 Kas 2009 
12 Extreme Energy 10 Kas 2009