| Name | First Aired | Runtime | Image | |
|---|---|---|---|---|
| S06E01 | Catastrophes that Changed the Planets |
October 25, 2011
History
|
60 | |
| S06E02 | Nemesis: The Sun's Evil Twin |
November 1, 2011
History
|
60 | |
| S06E03 | How the Solar System was Made |
November 8, 2011
History
|
60 | |
| S06E04 | Crash Landing on Mars |
November 22, 2011
History
|
60 | |
| S06E05 | Worst Days on Planet Earth |
November 29, 2011
History
|
60 | |
| S06E06 | UFO: The Real Deal |
December 13, 2011
History
|
60 | |
| S06E07 |
God and the Universe
season finale
|
December 20, 2011
History
|
60 | |
| S06E08 | How Big, How Far, How Fast |
April 29, 2012
History
|
60 | |
| S06E09 | Alien Sounds |
May 6, 2012
History
|
60 | |
| S06E10 | Our Place in the Milky Way |
May 13, 2012
History
|
60 | |
| S06E11 |
Deep Freeze
season finale
|
May 20, 2012
History
|
60 |
No artwork of this type.
No artwork of this type.
