6.18 avg 13 episodes 6.5 → 6.0 44 min avg
| # | Title | Rating | Votes |
|---|---|---|---|
| 1 | American Maya Secrets | 6.5 | 44 |
| 2 | Medieval Desert Mystery | 6.3 | 39 |
| 3 | Great Lakes Copper Heist | 7.1 | 41 |
| 4 | Giants in Minnesota | 6.1 | 44 |
| 5 | A Deadly Sacrifice | 6.6 | 37 |
| 6 | Stonehenge in America | 6.5 | 35 |
| 7 | Mystery of Roanoke | 5.7 | 38 |
| 8 | Chamber Hunting | 5.8 | 34 |
| 9 | Motive for Murder | 5.9 | 34 |
| 10 | The Desert Cross | 6.2 | 35 |
| 11 | Tracking the Templars | 5.9 | 30 |
| 12 | America's Oldest Secret | 5.8 | 32 |
| 13 | Hunt for the Holy Grail | 6.0 | 26 |
5.85 avg 13 episodes 5.4 → 6.8 44 min avg
| # | Title | Rating | Votes |
|---|---|---|---|
| 1 | Ark of the Covenant | 5.4 | 20 |
| 2 | The New World Order | 5.6 | 24 |
| 3 | Great Wall of Texas | 6.0 | 29 |
| 4 | Vikings in America | 5.4 | 26 |
| 5 | Grand Canyon Treasure | 5.1 | 24 |
| 6 | Lost Tribe of Menehune | 6.2 | 18 |
| 7 | Secret Blueprint of America | 5.8 | 17 |
| 8 | The Underwater Pyramids | 5.7 | 20 |
| 9 | Mystery of the Serpents | 6.1 | 15 |
| 10 | Lost Relics of the Bible | 5.7 | 16 |
| 11 | Swamp Mammoth | 6.9 | 18 |
| 12 | Lincoln's Secret Assassins | 5.4 | 18 |
| 13 | The Spearhead Conspiracy | 6.8 | 15 |
6.58 avg 13 episodes 7.1 → 7.1 43 min avg
| # | Title | Rating | Votes |
|---|---|---|---|
| 1 | Secrets of the Alamo | 7.1 | 25 |
| 2 | Guardians of Superstition Mountain | 6.7 | 22 |
| 3 | The Appalachian Giant | 6.3 | 18 |
| 4 | Montezuma's Gold | 6.5 | 20 |
| 5 | Custer's Blood Treasure | 6.1 | 20 |
| 6 | Captain Kidd's Pirate Code | 5.4 | 17 |
| 7 | Marco Polo Discovers America | 6.4 | 17 |
| 8 | The Plot to Steal America | 5.7 | 20 |
| 9 | The Blood Stone | 7.5 | 15 |
| 10 | Egyptian Secrets of NYC | 7.8 | 18 |
| 11 | Tracking Bigfoot | 5.4 | 17 |
| 12 | The Templars' Deadliest Secret: The Chase | 7.6 | 18 |
| 13 | The Templars' Deadliest Secret: Evidence Exposed | 7.1 | 16 |
6.98 avg 10 episodes 7.2 → 7.9 41 min avg
| # | Title | Rating | Votes |
|---|---|---|---|
| 1 | Vikings in the Desert | 7.2 | 16 |
| 2 | Alien Artifacts | 7.0 | 16 |
| 3 | Cave of Secrets | 7.2 | 14 |
| 4 | The Ripper Unmasked | 6.0 | 18 |
| 5 | Phoenicians in America | 6.8 | 13 |
| 6 | The Spy Who Saved America | 7.6 | 16 |
| 7 | Bigfoot of the Bayou | 6.5 | 15 |
| 8 | Drake's Lost Treasure | 6.7 | 10 |
| 9 | Chicago's Mystery Bomber | 6.9 | 11 |
| 10 | Exodus of the Templars | 7.9 | 11 |
