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| Aflevering | Eerste uitzending |
|---|---|
| S09E01 - I-Spy | 09/09/2011 |
| S09E02 - International | 16/09/2011 |
| S09E03 - Imbroglio | 23/09/2011 |
| S09E04 - Indecision | 30/09/2011 |
| S09E05 - Invertebrates | 07/10/2011 |
| S09E06 - Inventive | 14/10/2011 |
| S09E07 - Incomprehensible | 21/10/2011 |
| S09E08 - Inequality | 28/10/2011 |
| S09E09 - Illness | 04/11/2011 |
| S09E10 - Inland Revenue | 11/11/2011 |
| S09E11 - Infantile | 18/11/2011 |
| S09E12 - Illumination | 25/11/2011 |
| S09E13 - Intelligence | 02/12/2011 |
| S09E14 - VG Part 1 | 16/12/2011 |
| S09E15 - VG Part 2 | 23/12/2011 |
| S09E16 - Ice | 29/12/2011 |
| S09E17 - Immortal Bard | 27/04/2012 |
| S09E18 - Idleness | 04/05/2012 |