7.47 avg 10 episodes 7.3 → 7.8 46 min avg
| # | Title | Rating | Votes |
|---|---|---|---|
| 1 | Accidental Discoveries | 7.3 | 14 |
| 2 | Military Mysteries | 7.7 | 13 |
| 3 | In Plain Sight | 7.2 | 13 |
| 4 | Submerged | 7.9 | 12 |
| 5 | Ancient Civilizations | 7.4 | 12 |
| 6 | Unreachable Places | 7.6 | 8 |
| 7 | Ghost Towns | 7.9 | 10 |
| 8 | Natural Mysteries | 7.1 | 11 |
| 9 | Lost at Sea | 6.8 | 11 |
| 10 | Unique Views | 7.8 | 9 |
7.56 avg 10 episodes 7.5 → 7.3 46 min avg
| # | Title | Rating | Votes |
|---|---|---|---|
| 1 | Out of Place | 7.5 | 10 |
| 2 | Disaster from Above | 6.6 | 10 |
| 3 | Expect the Unexpected | 8.4 | 10 |
| 4 | Ocean Mysteries | 7.6 | 8 |
| 5 | Behind the Myths | 7.8 | 7 |
| 6 | Giants | 7.0 | 8 |
| 7 | Mysterious Monuments | 8.1 | 7 |
| 8 | A Whole lot of Holes | 7.9 | 9 |
| 9 | Far from Above | 7.4 | 8 |
| 10 | Ancient Civilizations | 7.3 | 8 |
6.92 avg 6 episodes 6.4 → 7.0 46 min avg
| # | Title | Rating | Votes |
|---|---|---|---|
| 1 | Out of This World | 6.4 | 6 |
| 2 | The Deserted | 7.3 | 6 |
| 3 | Mysteries of the Misplaced | 5.9 | 9 |
| 4 | Ancient Mysteries | 7.7 | 6 |
| 5 | Extraordinarily Out of the Ordinary | 7.2 | 8 |
| 8 | Great Cities | 7.0 | 5 |
