Expedition Unknown

Josh searches for more than 1,000 POWs lost in the Pacific Theater. He dives to find lost Allied soldiers on the Hōfuku Maru, a notorious Japanese "Hellship." Then, Josh receives unprecedented access to join a U.S. Department of Defense recovery mission.

A deep-water dive leads to the historic discovery of a lost WWII hellship, where an estimated 1,000 soldiers made the ultimate sacrifice. Given rare access, Josh assists a U.S. Department of Defense mission, recovering potential remains of American POWs.