Expedition Unknown (2015 – ...)

2015 • 18 seasons • Documentary, Reality • TV-PG

On August 7, 2026

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Episode 5 — Secrets of Mexico's Underworld

Name: Episode 5 — Secrets of Mexico's Underworld
Released: 2026-07-22
Duration: 42 min
Cast: Josh Gates

Season 18 • Expedition Unknown

Released: 2026-07-22 • Documentary/Reality/Action & Adventure

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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.

Episodes

Episode 1
Hunt for World War II Hellships
2026-06-24

Episode 2
Finding World War II's Lost Prisoners
2026-07-01

Episode 3
Death Jars of Laos
2026-07-08

Episode 4
Sunken City of Pirates
2026-07-15

Episode 5
Secrets of Mexico's Underworld
2026-07-22

Information

Episode air date	22.07.2026
Episode runtime	42 min
Episode rating	0.00
Genres	Documentary / Reality / Action & Adventure
TMDB series rating	8.0
IMDb series rating	8.2
Series status	Returning series
Age rating	6+
Country	US