Sezon 4
Grafiki
| # | Obraz | Tytuł | Wyemitowano |
|---|---|---|---|
| 1 |  | Viking Secrets | 27 gru 2017 |
| 2 |  | Vikings In America | 3 sty 2018 |
| 3 |  | Origins of Stonehenge | 10 sty 2018 |
| 4 |  | The Secret | 17 sty 2018 |
| 5 |  | Butch Cassidy's Lost Loot | 24 sty 2018 |
| 6 |  | Hunt For The Metal Library | 31 sty 2018 |
| 7 |  | Great Women of Ancient Egypt | 7 lut 2018 |
| 8 |  | Egypt's Lost Queens | 14 lut 2018 |
| 9 |  | Secrets of Brother XII | 28 lut 2018 |