Expedition Unknown

Josh chases the fortune stolen by loyalists to Britain's crown during the American Revolution. Jumping into two investigations of the infamous Doan Gang, Josh helps dig up a cache of plundered coins. Later, a cave search pinpoints the turncoats' hideout.

Weeks before the D-Day invasion, Britain's Barracuda bomber took out the largest Nazi warship ever built -- but today, not a single Barracuda exists. Josh joins a one-of-a-kind restoration project and searches for wreckage far above the Arctic Circle.

Josh dives the waters off Tanzania to find a lost city and its fortunes. From the remote outpost of Zanzibar, Josh searches for ancient shipwrecks. Then, joining an expert team, Josh dives into what could be the walls of a lost city that traded riches.

In World War II's closing days, 18 American servicewomen were lost off the Ivory Coast. Armed with new technology and fresh insights from the crash archives, Josh joins Project Recover to guide the search for the heroines' lost C47 plane.

Chasing archaeology's biggest prize -- the lost tomb and treasure of Alexander the Great -- Josh dives Egypt's coast, revealing ruins of Alexander's Royal Quarter. Josh tunnels under modern Alexandria, but a water pump malfunction puts everything at risk.

Spanning Europe and Africa, Josh's chase for Alexander's remains and fortune ramps up. Clues mount in a flooded ruin beneath Alexandria, Egypt. Later, Josh gathers shocking evidence Alexander's body may actually lie in Venice's St. Mark's Cathedral.

Josh braves the shark-infested waters of Cape Cod to dive the world's only confirmed pirate wreck. Black Sam's treasure includes gold and jewels.

In a holiday search spanning three continents, Josh gathers DNA as he chases the truth about St. Nicholas, the real-life saint who became Santa Claus.

Josh tracks the treasure of an outlaw posse who terrorized the Midwest's railroads. He searches for lost millions in the gang's cave hideout.

Josh braves Puerto Rico's choppy seas to find a legendary missing plane. The crash of Pan Am's Clipper Endeavor changed commercial aviation forever.

With unprecedented access, Josh digs in front of Petra's iconic Treasury. Josh rappels a seven-story cliff face to perform a high-tech scan.

Rewriting history, Josh helps discover a tomb at Petra's iconic Treasury. The twelve skeletons inside may belong to a royal family of Petra.