Season 4
Artwork
| # | Image | Title | Aired |
|---|---|---|---|
| 1 |  | Viking Secrets | Dec 27, 2017 |
| 2 |  | Vikings In America | Jan 3, 2018 |
| 3 |  | Origins of Stonehenge | Jan 10, 2018 |
| 4 |  | The Secret | Jan 17, 2018 |
| 5 |  | Butch Cassidy's Lost Loot | Jan 24, 2018 |
| 6 |  | Hunt For The Metal Library | Jan 31, 2018 |
| 7 |  | Great Women of Ancient Egypt | Feb 7, 2018 |
| 8 |  | Egypt's Lost Queens | Feb 14, 2018 |
| 9 |  | Secrets of Brother XII | Feb 28, 2018 |