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| Aflevering | Eerste uitzending |
|---|---|
| S12E01 - Alien Hunters | 28/04/2017 |
| S12E02 - Forged by the Gods | 05/05/2017 |
| S12E03 - The Mystery of Rudloe Manor | 12/05/2017 |
| S12E04 - The Alien Architects | 19/05/2017 |
| S12E05 - The Pharaohs' Curse | 26/05/2017 |
| S12E06 - The Science Wars | 02/06/2017 |
| S12E07 - City of the Gods | 09/06/2017 |
| S12E08 - The Alien Frequency | 16/06/2017 |
| S12E09 - The Majestic Twelve | 07/07/2017 |
| S12E10 - The Akashic Record | 14/07/2017 |
| S12E11 - Voices of the Gods | 21/07/2017 |
| S12E12 - The Animal Agenda | 28/07/2017 |
| S12E13 - The Replicants | 04/08/2017 |
| S12E14 - A Spaceship Made of Stone | 11/08/2017 |
| S12E15 - The Alien Disks | 08/09/2017 |
| S12E16 - Return to Gobekli Tepe | 15/09/2017 |