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| Aflevering | Eerste uitzending |
|---|---|
| S04E01 - Viking Secrets | 27/12/2017 |
| S04E02 - Vikings In America | 03/01/2018 |
| S04E03 - Origins of Stonehenge | 10/01/2018 |
| S04E04 - The Secret | 17/01/2018 |
| S04E05 - Butch Cassidy's Lost Loot | 24/01/2018 |
| S04E06 - Hunt For The Metal Library | 31/01/2018 |
| S04E07 - Great Women of Ancient Egypt | 07/02/2018 |
| S04E08 - Egypt's Lost Queens | 14/02/2018 |
| S04E09 - Secrets of Brother XII | 28/02/2018 |