第 9 季 共 11 集
播出时间：2021年5月3日
第 1 集 Lost City of Persia
播出时间：2021年5月3日
Experts reveal the secrets of the Persian Empire's capital, Persepolis.
第 2 集 Valley of Egypt's Queens
播出时间：2021年5月10日
The Valley of the Queens is a vast necropolis concealing some of Egypt's most miraculous tombs and powerful women; now, investigators use cutting-edge tech to explore lost tunnels and uncover the enigmatic secrets behind these ancient pharaohs.
第 3 集 Curse of Relic Mountain
播出时间：2021年5月17日
Experts reveal the mystery behind the decapitated statues of Mount Nemrut.
第 4 集 Lost City of the Maya Queens
播出时间：2021年5月24日
The downfall of the powerful Maya city of Palenque in southern Mexico continues to mystify archaeologists today; now, investigators gain rare access to explore lost tombs to reveal the truth behind this legendary city and the mystery behind its enigmatic queens.
第 5 集 Lost City of the Sumerian Gods
播出时间：2021年5月31日
The ancient Sumerian city of Nippur is one of the richest archaeological sites on Earth, but decades of conflict have prevented its exploration; now, experts gain rare access to finally uncover the mysteries behind the most sacred city of Mesopotamia.
第 6 集 Egypt's Island of Secrets
播出时间：2021年6月7日
Experts investigate an ancient temple monument on an Egyptian island.
第 7 集 Egypt's Cult Kings
播出时间：2021年6月14日
Experts investigate secrets behind the ancient Egyptian city of Abydos.
第 8 集 King Arthur's Lost Castle
播出时间：2021年6月21日
Experts use cutting-edge tech to unlock the secrets of Tintagel Castle.
第 9 集 Lost World of Desert Kings
播出时间：2021年6月28日
The ancient city of Samarra contains a series of medieval structures that hold secrets to one of the world's greatest empires; now, archaeologists use pioneering technology to investigate its astonishing rise to power and reveal its monumental downfall.
第 10 集 Rome's Lost Coliseums
播出时间：2021年7月12日
Previously undiscovered secrets and mysteries behind famous American monuments are revealed. Scientific and technology experts join hands in unraveling some interesting truths about these monuments that were not common knowledge.
第 11 集 Legend of Xanadu
播出时间：2021年7月19日
The coliseums of Rome were brutal theaters of spectacle and death that helped control the sprawling Roman empire; now, archaeologists uncover the engineering secrets behind these majestic structures to reveal the truth behind the ancient Roman world.
