In the two-part season premiere, Josh is on the hunt for the lost tomb of Alexander the Great, the conqueror who ruled over one of the largest empires in history until his untimely demise. His treasure-laden tomb has been lost ever since - its location one of the most sought-after mysteries of all time. A team digging in Egypt believes they are closing in on archaeology's greatest prize, while divers are plumbing the depths of the Mediterranean for evidence of the royal necropolis. And a British historian may have tracked down Alexander's sarcophagus and his mummified remains in the most unlikely of locations.

Josh Gates also travels above the Arctic Circle to lead search efforts for ultra-rare wreckage from a Barracuda, an extinct torpedo bomber from World War 2 designed to take out Nazi warships. Half a world away, Josh will search the ocean floor off the remote coast of Tanzania for Africa's Atlantis to uncover what could be the lost city of Rhapta, the legendary trading outpost at the edge of the Roman Empire. In the United States, Josh hunts for treasure stolen by traitors during the American Revolution and tracks the lost loot from our nation's first train robbers. Finally, Josh is on the trail of the saint who became Santa Claus, searching for the stolen bones of the real St. Nick on a quest that spans three continent