Season 4
Artwork
| # | Image | Title | Aired |
|---|---|---|---|
| 1 |  | Sacrifice | Sep 28, 2008 |
| 2 |  | Sudden Flight | Oct 5, 2008 |
| 3 |  | Sex Trade | Oct 12, 2008 |
| 4 |  | The Conduit | Oct 19, 2008 |
| 5 |  | Dancing Lessons | Oct 26, 2008 |
| 6 |  | Inquisition | Nov 2, 2008 |
| 7 |  | Into Hell, Part One | Nov 9, 2008 |
| 8 |  | Into Hell, Part Two | Nov 16, 2008 |
| 9 |  | Shadow Riders | Nov 23, 2008 |
| 10 |  | Misled & Misguided | Nov 30, 2008 |
| 11 |  | Switchblade | Dec 21, 2008 |
| 12 |  | Bad Beat | Jan 4, 2009 |
| 13 |  | The Spear of Destiny | Jan 11, 2009 |
| 14 |  | The Last Nazi | Feb 15, 2009 |
| 15 |  | Hero | Mar 8, 2009 |
| 16 |  | Hill 60 | Mar 15, 2009 |
| 17 |  | Flesh and Blood | Mar 22, 2009 |
| 18 |  | Best Laid Plans | Mar 29, 2009 |
| 19 |  | Whiplash | Apr 12, 2009 |
| 20 |  | Chaos Theory | Apr 26, 2009 |
| 21 |  | Endgame | May 3, 2009 |
| 22 |  | Unknown Soldier | May 10, 2009 |