Season 6: Episode 4

Season 6: Episode 6

What on Earth (2015)

Season 6: Episode 5

The Cave to Hell

TMDb

Air Date:

2025-12-06

Genre

Documentary

Release Date

2015

End Date

2023

Episode Description

When a sinister cave is discovered in a remote corner of Iceland, experts uncover a secret underworld tunneling to unknown depths, and using cutting-edge tech, they investigate if this strange place could hold secrets of alien worlds.

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Cast

Lost City of Gold

Secrets of the Sahara

North Korea is Burning

Nazi Ice Fortress

Finding Vietnam's Lost POWs

Secret of Doomsday Mountain

Lost City of the Kalahari

Who Built Supervillain Island?

Curse of the Lost Kingdom

Hidden Tomb of Genghis Khan

Grand Canyon Treasure

Mystery in the Outback

Riddle in the Ruins

Stonehenge of the Holy Land

Did We Find Flight 370?

Gateway to Eden

Dagger of Tutankhamun

Raiders of the Holy Lance

The Swastika Conspiracy

Inside El Chapo's Escape

Curse of the Sea Monster

Strange Symbols in the Desert

Bloody Secret Of The Lost City

Lost Empire Of The Amazon

Siberian Hell Pit

Hunt for El Dorado

Mystery of the Mummy Desert

Forbidden Cities of the Maya

The Curse of Merlin

Fountain of Youth Found?

Mafia Ghost Ship

Beasts of the Lost Jungle

Mystery of Fang Forest

Village of the Damned

The Minotaur's Lair

Lost City Of Goliath

Finding King Arthur

Treasures Of Valhalla

Hitler's Lost Gold

Temple of Blood

North Korea's Forbidden Islands

Cannibals in the Ghost City

Curse of Medusa

Nazi Stonehenge

Hunting the Ark of the Covenant

Forbidden City of Inca Gold

Ghost Ship of Hell Island

Mayan Armageddon: The New Evidence

CIA Killer Monks

Monsters at Fort Madness

Satan in Siberia

Curse of the Ice Zombies

Ghost Fleet of Cannibal Bay

Finding Jack the Ripper

Mystery of the Desert Shipwrecks

Blood in the Garden of Eden

Phantoms in the Chamber of Secrets

Cannibal Death Pit

World's Deadliest Threats

Monsters of Diamond Desert

North Korea Death Star

Aliens of the Infinity War

The Cave to Hell

Terror of the Ice Snake

Curse of Genghis Khan

The King at Roswell

Treasures of Monster Graveyard

Nazi Doomsday Forest

Bermuda Triangle of Space

Chernobyl's Nuclear Monsters

Curse of Phantom Island

Amazon's Secret Nightmare

Ghost Town Terror

Imhotep's Lost Labyrinth

Hunt for Atlantis

Ruins Of Cannibal City

Nazi Crop Circles

Island of the Alien Ooze

Chinese Nuclear Pyramid

Americas' Lost Romans

The Damned of Devil's Island

Nazi Occult Temple

Enigmas of Area 51

Curse of King Arthur

Curse of the Amazon Nazis

Epstein’s Forbidden Temple

Aztec Alien Mystery

Gate to the Viking Gods

America’s Swamp Castle

Lost City of the Vampires

Temple of the Island Eater

Horror of Dead Man's Island

Stalin's Secret Atlantis

America's Secret Apocalypse

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