Season 4
Artwork
| # | Image | Title | Aired |
|---|---|---|---|
| 1 |  | Adrift (2) | Sep 28, 2007 |
| 2 |  | Lifeline (3) | Oct 5, 2007 |
| 3 |  | Reunion | Oct 12, 2007 |
| 4 |  | Doppelganger | Oct 19, 2007 |
| 5 |  | Travelers | Oct 26, 2007 |
| 6 |  | Tabula Rasa | Nov 2, 2007 |
| 7 |  | Missing | Nov 9, 2007 |
| 8 |  | The Seer | Nov 16, 2007 |
| 9 |  | Miller's Crossing | Nov 30, 2007 |
| 10 |  | This Mortal Coil (1) | Dec 7, 2007 |
| 11 |  | Be All My Sins Remember'd (2) | Jan 4, 2008 |
| 12 |  | Spoils of War | Jan 11, 2008 |
| 13 |  | Quarantine | Jan 18, 2008 |
| 14 |  | Harmony | Jan 25, 2008 |
| 15 |  | Outcast | Feb 1, 2008 |
| 16 |  | Trio | Feb 8, 2008 |
| 17 |  | Midway | Feb 15, 2008 |
| 18 |  | The Kindred (1) | Feb 22, 2008 |
| 19 |  | The Kindred (2) | Feb 29, 2008 |
| 20 |  | The Last Man (1) | Mar 7, 2008 |