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| Aflevering | Eerste uitzending |
|---|---|
| S04E01 - Neither Here Nor There | 23/09/2011 |
| S04E02 - One Night in October | 30/09/2011 |
| S04E03 - Alone in the World | 07/10/2011 |
| S04E04 - Subject 9 | 14/10/2011 |
| S04E05 - Novation | 04/11/2011 |
| S04E06 - And Those We've Left Behind | 11/11/2011 |
| S04E07 - Wallflower | 18/11/2011 |
| S04E08 - Back To Where You've Never Been | 13/01/2012 |
| S04E09 - Enemy of My Enemy | 20/01/2012 |
| S04E10 - Forced Perspective | 27/01/2012 |
| S04E11 - Making Angels | 03/02/2012 |
| S04E12 - Welcome to Westfield | 10/02/2012 |
| S04E13 - A Better Human Being | 17/02/2012 |
| S04E14 - The End of All Things | 24/02/2012 |
| S04E15 - A Short Story About Love | 23/03/2012 |
| S04E16 - Nothing As It Seems | 30/03/2012 |
| S04E17 - Everything in Its Right Place | 06/04/2012 |
| S04E18 - The Consultant | 13/04/2012 |
| S04E19 - Letters of Transit | 20/04/2012 |
| S04E20 - Worlds Apart | 27/04/2012 |
| S04E21 - Brave New World (1) | 04/05/2012 |
| S04E22 - Brave New World (2) | 11/05/2012 |