| Episode | Title | Premiere |
|---|---|---|
| 20 | Incursion (Part 2) | June 11, 2010 |
| 19 | Incursion (Part 1) | June 4, 2010 |
| 18 | Subversion | May 21, 2010 |
| 17 | Pain | May 14, 2010 |
| 16 | Sabotage | May 7, 2010 |
| 15 | Lost | April 30, 2010 |
| 14 | Human | April 23, 2010 |
| 13 | Faith | April 16, 2010 |
| 12 | Divided | April 9, 2010 |
| 11 | Space | April 2, 2010 |
| 10 | Justice | December 4, 2009 |
| 09 | Life | November 20, 2009 |
| 08 | Time | November 13, 2009 |
| 07 | Earth | November 6, 2009 |
| 06 | Water | October 30, 2009 |
| 05 | Light | October 23, 2009 |
| 04 | Darkness | October 16, 2009 |
| 03 | Air, Part 3 | October 9, 2009 |
| 02 | Air, Part 2 | October 2, 2009 |
| 01 | Air, Part 1 | October 2, 2009 |
| Episode | Title | Premiere |
|---|---|---|
| 20 | Gauntlet | May 9, 2011 |
| 19 | Blockade | May 2, 2011 |
| 18 | Epilogue | April 25, 2011 |
| 17 | Common Descent | April 18, 2011 |
| 16 | The Hunt | April 11, 2011 |
| 15 | Seizure | April 4, 2011 |
| 14 | Hope | March 28, 2011 |
| 13 | Alliances | March 21, 2011 |
| 12 | Twin Destinies | March 14, 2011 |
| 11 | Deliverance | March 7, 2011 |
| 10 | Resurgence, Part 1 | November 30, 2010 |
| 09 | Visitation | November 23, 2010 |
| 08 | Malice | November 16, 2010 |
| 07 | The Greater Good | November 9, 2010 |
| 06 | Trial and Error | November 2, 2010 |
| 05 | Cloverdale | October 26, 2010 |
| 04 | Pathogen | October 19, 2010 |
| 03 | Awakening | October 12, 2010 |
| 02 | Aftermath | October 5, 2010 |
| 01 | Intervention (Part 3) | September 28, 2010 |
