Expedition Unknown Season 18 Episode 4

Name: Sunken City of Pirates
Genre: Documentary, Reality, Action & Adventure
Released: 2026-07-15
Duration: 48 min

Expedition Unknown

expedition unknown season 18 episode 4 online. 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.

Genre: Documentary, Reality, Action & Adventure
Country: United States of America
Director:
Cast: Josh Gates

Select Seasons

18x1
Hunt for World War II Hellships (18x1)
18x2
Finding World War II's Lost Prisoners (18x2)
18x3
Death Jars of Laos (18x3)
18x4
Sunken City of Pirates (18x4)
18x5
Secrets of Mexico's Underworld (18x5)
18x6
Inca Treasure Tunnels (18x6)
18x7
Chasing Civil War Gold (18x7)

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Hunt for World War II Hellships (18x1)

Finding World War II's Lost Prisoners (18x2)

Death Jars of Laos (18x3)

Sunken City of Pirates (18x4)

Secrets of Mexico's Underworld (18x5)

Inca Treasure Tunnels (18x6)

Chasing Civil War Gold (18x7)