Expedition Unknown - Season 18

First aired: 6/24/2026 6 episodes

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Episodes

1. Hunt for World War II Hellships

Aired: 6/24/2026

Josh searches for lost Allied soldiers on the Hofuku Maru, a Japanese Hellship.

2. Finding World War II's Lost Prisoners

Aired: 7/1/2026

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. Given rare access, Josh assists a U.S. Department of Defense mission, recovering potential remains of American POWs.

3. Death Jars of Laos

Aired: 7/8/2026

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.

4. Sunken City of Pirates

Aired: 7/15/2026

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.

5. Secrets of Mexico's Underworld

Aired: 7/22/2026

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.

6. Shark Secrets

Aired: 7/29/2026

Josh Gates investigates the USS Indianapolis disaster, which led to history's deadliest shark attack, explores the mystery of Scotland's Stronsay Beast, and examines remains that may reveal the first confirmed shark attack ever recorded.