Drain the Oceans - Season 4 (2021)

From 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.

Clues from a 13,000-year-old skeleton and a submerged coastline reveal surprising insights about the first humans to arrive in the Americas.

A 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.

From a steamboat in a cornfield to the true story behind Hurricane Katrina's floods, new discoveries reveal how the Mississippi river shaped America.

Remnants of colonization attempts, a revolutionary refugee ship and submerged subway cars reveal hurricanes' impacts on America's past and its future.

The 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.

The 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.