Season 4
8 episodes · Aug 2, 2021
Season Videos
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S4E1The Wild West
Aug 2, 202147mUncovered clues from a famous Montana battleground, a 19th-century steamboat and a frontier ghost town reveal surprising truths about the Wild West.
S4E2The Battle for the Black Swan
Aug 2, 202147mArchaeologists and treasure hunters battle it out over half a billion dollars worth of gold and silver. Who will win the Battle for the Black Swan?
S4E3Hollywood
Aug 9, 202147mFrom a buried film set to a WW1 Navy ship and old fishing barge, we discover the role these ruins played in Hollywood movie-making history.
S4E4The First Americans
Aug 9, 202147mClues from a 13,000-year-old skeleton and a submerged coastline reveal surprising insights about the first humans to arrive in the Americas.
S4E5Venice's Lost Empire
Aug 9, 202147mA 14th-century galley entombed in mud, a 16th-century hoard of luxury cargo, and a gruesome discovery reveal the rise and fall of the Venetian Empire.
S4E6Hurricane Apocalypse
Aug 17, 202147mRemnants of colonization attempts, a revolutionary refugee ship and submerged subway cars reveal hurricanes' impacts on America's past and its future.
S4E7The Great Barrier Reef
Aug 23, 202147mThe mysterious sinking of Australia’s “Titanic”, a warship on a dangerous mission, and a ROV expedition searching for clues at the bottom of the reef.
S4E8Sea of Secrets
Aug 23, 202147mThe Black Sea is a place of myth and legend and ships have sailed on its waters for millennia. Three wrecks unlock secrets of this mysterious sea.Remnants of colonization attempts, a revolutionary refugee ship and submerged subway cars reveal hurricanes' impacts on America's past and its future.