6 - 1Catastrophes that Changed the Planets Oct. 25, 2011
6 - 2Nemesis: The Sun's Evil Twin Nov. 01, 2011
6 - 3How the Solar System was Made Nov. 08, 2011
6 - 4Crash Landing on Mars Nov. 22, 2011
6 - 5Worst Days on Planet Earth Nov. 29, 2011
6 - 6UFO: The Real Deal Dec. 13, 2011
6 - 7God and the Universe Dec. 20, 2011