7.85 avg 6 episodes 7.6 → 8.3 43 min avg
| # | Title | Rating | Votes |
|---|---|---|---|
| 1 | Mayan City of Blood | 7.6 | 32 |
| 2 | Dark Secrets of the Pyramid | 7.6 | 44 |
| 3 | Summit of the Gods | 8.1 | 30 |
| 4 | Ghosts of the Great Wall | 7.7 | 30 |
| 5 | House of Holy Relics | 7.8 | 27 |
| 6 | Secrets of the Palace | 8.3 | 29 |
7.69 avg 12 episodes 8.0 → 7.9 42 min avg
| # | Title | Rating | Votes |
|---|---|---|---|
| 1 | Tut's Buried Secrets | 8.0 | 41 |
| 2 | Curse of the Blood Pyramids | 7.8 | 35 |
| 3 | Lost Temples of the Jungle | 7.7 | 37 |
| 4 | Secret History of the Sphinx | 7.9 | 37 |
| 5 | Ghosts of Stonehenge | 7.4 | 42 |
| 6 | Hunt for King Arthur's Castle | 7.4 | 37 |
| 7 | Hidden City of the Incas | 7.3 | 31 |
| 8 | Treasures of the Terracotta Army | 7.8 | 34 |
| 9 | Mystery of Egypt's Mega Temple | 8.0 | 40 |
| 10 | Sex, Lies, and the Taj Mahal | 7.2 | 35 |
| 11 | Lost World of the Colosseum | 7.9 | 37 |
| 12 | Lost City of the Desert | 7.9 | 34 |
7.17 avg 7 episodes 6.9 → 6.9 42 min avg
| # | Title | Rating | Votes |
|---|---|---|---|
| 1 | Viking City of the Dead | 6.9 | 28 |
| 2 | Lost Pyramids of the Americas | 7.3 | 32 |
| 3 | Forbidden City of the Pharaohs | 7.4 | 32 |
| 4 | Statue of Liberty - The New Secrets | 7.3 | 34 |
| 5 | Hunt for the Real Atlantis | 6.8 | 28 |
| 6 | Lost World of Easter Island | 7.6 | 29 |
| 7 | Wrath of Attila the Hun | 6.9 | 32 |
7.58 avg 10 episodes 7.4 → 7.7 42 min avg
| # | Title | Rating | Votes |
|---|---|---|---|
| 1 | Titanic: The Last Secrets | 7.4 | 25 |
| 2 | Mystery of the Cursed Pyramid | 7.3 | 27 |
| 3 | Pompeii's Doomsday Mummies | 7.7 | 28 |
| 4 | Secrets of the Forbidden City | 7.6 | 26 |
| 5 | Inca Apocalypse: The Dark Evidence | 7.4 | 23 |
| 6 | Egypt's Lost Skyscrapers | 7.4 | 29 |
| 7 | Curse of the Jungle Treasure | 8.0 | 27 |
| 8 | Ramses' Buried Treasures | 7.8 | 28 |
| 9 | Lost City of the Maya | 7.5 | 28 |
| 10 | Ghosts of the Stone Age | 7.7 | 24 |
7.78 avg 8 episodes 7.8 → 7.6 42 min avg
| # | Title | Rating | Votes |
|---|---|---|---|
| 1 | Mysteries in the Alien Desert | 7.8 | 29 |
| 2 | Empire State Building: The New Secrets | 8.0 | 32 |
| 3 | Nero's Lost Palace | 7.9 | 35 |
| 4 | Curse of the Seventh Wonder | 7.3 | 28 |
| 5 | Pompeii's Evil Twin | 7.8 | 31 |
| 6 | Finding Sparta's 300 | 8.2 | 31 |
| 7 | Dead Sea Scrolls: The Dark Truth | 7.6 | 35 |
| 8 | Mystery of the Ice Mummy | 7.6 | 25 |
8.06 avg 13 episodes 7.9 → 8.3 45 min avg
| # | Title | Rating | Votes |
|---|---|---|---|
| 1 | Egypt's Buried City | 7.9 | 26 |
| 2 | Vesuvius's Secret Victim | 8.3 | 27 |
| 3 | Lost City of Troy | 7.4 | 27 |
| 4 | Mount Rushmore: The Hidden Secrets | 7.8 | 24 |
| 5 | Tower of Babel: The New Evidence | 8.0 | 31 |
| 6 | Hitler's Lost Bunker | 7.4 | 26 |
| 7 | Leaning Tower of Pisa: The New Mystery | 8.4 | 25 |
| 8 | Ghosts of the Wild West | 8.0 | 24 |
| 9 | Secrets of the Seven Wonders | 8.6 | 18 |
| 10 | Hunt for the First Pyramid | 8.3 | 21 |
| 11 | Alcatraz's Hidden Secrets | 8.2 | 22 |
| 12 | Rome's Great Wall | 8.2 | 25 |
| 13 | Lost Kingdom of Kush | 8.3 | 20 |
7.91 avg 15 episodes 7.6 → 8.1
| # | Title | Rating | Votes |
|---|---|---|---|
| 1 | Lost Kingdom of Babylon | 7.6 | 27 |
| 2 | Draining the Bermuda Triangle | 7.2 | 21 |
| 3 | Secrets of the Black Pyramid | 8.0 | 24 |
| 4 | Curse of the Hindenburg | 7.1 | 20 |
| 5 | Twin Towers: The Hidden Secrets | 8.0 | 20 |
| 6 | Lost World of Atlantis | 7.9 | 21 |
| 7 | Jericho's Buried Secrets | 7.7 | 19 |
| 8 | Egypt's Sunken Treasures | 8.3 | 18 |
| 9 | Seven Wonders of America | 8.4 | 15 |
| 10 | Seven Wonders of Egypt | 8.8 | 16 |
| 11 | Seven Wonders of Ancient America | 8.2 | 14 |
| 12 | Seven Wonders of Ancient Rome | 8.1 | 13 |
| 13 | Seven Wonders of the Pyramids | 7.8 | 12 |
| 14 | Greatest Lost Cities | 7.4 | 11 |
| 15 | Seven Wonders of the Silk Road | 8.1 | 7 |
7.67 avg 9 episodes 7.6 → 7.7 42 min avg
| # | Title | Rating | Votes |
|---|---|---|---|
| 1 | Mystery of the Volcano Temple | 7.6 | 20 |
| 2 | Rome's Gate to Hell | 8.3 | 21 |
| 3 | Legend of King Midas | 8.1 | 17 |
| 4 | Ghosts of Venice | 7.6 | 18 |
| 5 | Terror in the Torture Tower | 8.1 | 17 |
| 6 | Secrets of Seahenge | 7.8 | 16 |
| 7 | Secrets of the Sunken Empire | 7.7 | 17 |
| 8 | Egypt's Floating Pyramid | 6.1 | 24 |
| 9 | Sumerian Pyramid of Death | 7.7 | 20 |
7.80 avg 11 episodes 8.4 → 7.8
| # | Title | Rating | Votes |
|---|---|---|---|
| 1 | Lost City of Persia | 8.4 | 32 |
| 2 | Valley of Egypt's Queens | 7.4 | 19 |
| 3 | Curse of Relic Mountain | 8.0 | 21 |
| 4 | Lost City of the Maya Queens | 7.6 | 20 |
| 5 | Lost City of the Sumerian Gods | 7.5 | 23 |
| 6 | Egypt's Island of Secrets | 8.2 | 21 |
| 7 | Egypt's Cult Kings | 7.6 | 25 |
| 8 | King Arthur's Lost Castle | 7.8 | 23 |
| 9 | Lost World of Desert Kings | 7.4 | 21 |
| 10 | Rome's Lost Coliseums | 8.1 | 16 |
| 11 | Legend of Xanadu | 7.8 | 19 |
8.03 avg 6 episodes 7.6 → 8.1
| # | Title | Rating | Votes |
|---|---|---|---|
| 1 | Pompeii's Mysterious Twin | 7.6 | 20 |
| 2 | Enigma of the Red Pyramid | 8.0 | 15 |
| 3 | Lost World of Sumerian Kings | 7.9 | 21 |
| 4 | Secrets of Hadrian's Villa | 8.4 | 17 |
| 5 | Rise of Egypt's Sun Kings | 8.2 | 14 |
| 6 | Nimrud: Secrets Revealed | 8.1 | 14 |
7.75 avg 6 episodes 8.1 → 6.8
| # | Title | Rating | Votes |
|---|---|---|---|
| 1 | The Lost Empire of Palmyra | 8.1 | 17 |
| 2 | Mystery of Egypt's Zodiac Temple: Secrets of Dendera | 8.1 | 13 |
| 3 | Lost Tomb of Alexander the Great | 8.1 | 16 |
| 4 | Sunken City of Helike: The Hunt for the Real Atlantis | 7.5 | 12 |
| 5 | Secrets of the Lost Sphinxes | 7.9 | 15 |
| 6 | Olous: Lost City of the Ancients | 6.8 | 11 |
