Expedition Unknown - Season 4

Josh investigates how a group of Norse tribesman gained power in medieval Europe. His search for answers begins in their one-time home base of Denmark and continues on to the first place they expanded off the continent, the remote island of Iceland.

Josh traces the Vikings' westward expansion from the volcanic landscape of Iceland to a mysterious settlement in Greenland and into North America. He aims to find out if they landed in the United States over 500 years before any other Europeans.

Josh travels to his ancestral home of Great Britain to explore the origins of Stonehenge. From high in the air to deep under the sea, he finds an unexpected network of monuments that could have inspired one of history's most mystical locations.

Josh travels all over the US to find the treasures featured in The Secret, a cryptic book published in the 1980s. He meets with members of the book's cult following, who each think they're on the verge of finding one of the 10 remaining treasures.

Josh immerses himself in Wild West lore on a quest to find Butch Cassidy's missing money. He traces the iconic outlaw's footsteps through Colorado, Utah and Nevada, eventually learning that he may need to find the man himself to locate the lost loot.

Josh travels through the jungles of Ecuador to explore the watery depths of Tayos Cave for a legendary set of metal plates believed to be created by an advanced ancient civilization.

In this first installment of an epic two-part episode, Josh journeys through the land of the Nile to uncover the secrets of the most powerful, and most elusive, women in ancient Egypt -- Hatshepsut, Nefertiti and Cleopatra.

In the second installment of an epic two-part investigation, Josh continues his journey through Egypt to uncover the secrets, and possibly the final resting place, of ancient history's most powerful women rulers -- Nefertiti and Cleopatra.

Josh Gates attempts to uncover a treasure left behind by the Aquarian Foundation, an isolated, insidious cult led by the notorious leader known as Brother XII.