Global explorer Josh Gates returns for an all-new season of the Emmy® Award-winning series EXPEDITION UNKNOWN, packed with high-stakes adventures and monumental discoveries. From far-flung jungles and remote waters to vast, unexplored caves, Gates pursues his boldest missions yet, hunting for vanished civilizations, diving deep to document lost wartime wrecks, and chasing groundbreaking evidence behind the world's most compelling mysteries.

Josh searches for more than 1,000 POWs lost in the Pacific Theater. He dives to find lost Allied soldiers on the Hofuku 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 hell ship, where an estimated 1,000 soldiers made the ultimate sacrifice. Josh assists a U.S. Department of Defense mission, recovering potential remains of American POWs.

Josh Gates treks into the remote jungles of Laos to investigate the mysterious Plain of Jars. Navigating landscapes still littered with unexploded ordnance, he uses advanced technology to uncover the secrets of this ancient, lost civilization.

A first-of-its-kind sonar survey reveals a submerged pirate lair located off the coast of Jamaica. Using groundbreaking photogrammetry, Josh dives in to hunt for the $50M stolen treasure of Black Bart, the King of Pirates.

Josh joins archeologists as they bushwhack through thick jungles and rappel into vast caves in search of the lost Zoque culture. Deep underground, the team pushes through flooded sections and finds thousands of ritual offerings that may solve the mystery.

Josh helps discover and explore a labyrinth of lost tunnels; he dodges traffic to assist in a first-ever radar scan below the busy streets of Cuzco, Peru; he joins them as they push into the tunnels and find priceless ancient treasures.

Josh hunts for millions in missing Confederate gold. First, he follows a new lead and explores a wagon train robbery site where gold and silver coins vanished. Then, an eyewitness account points to the location of Jefferson Davis's lost war chest.