S4 E1 • Dracula's Tomb

Strange mounds in Transylvania might pinpoint the location of the tomb of the bloodthirsty tyrant believed to have inspired Dracula; a mysterious ancient city is discovered on a coral reef; images of a plane crash sets off a hunt for a drug lord.

Première diffusion : 17 octobre 2017

S4 E2 • Fountain of Youth Found?

A strange structure shaped like a giant shark might point the way to a lost civilization's fountain of youth; a massive hurricane heads toward Florida but something unexpected is in its eye; bizarre marks across the eastern US leave experts baffled.

Première diffusion : 24 octobre 2017

S4 E3 • Mafia Ghost Ship

A ghost ship with links to the mob suddenly appears on a California beach; strange markings could be a coded message that reveals a plot to overthrow the Queen of England; a lake believed to have magical healing powers holds clues to life on Mars.

Première diffusion : 31 octobre 2017

S4 E4 • Beasts of the Lost Jungle

A ghost town covered in a strange, white powder emerges from a lake in Argentina; when a lost jungle is discovered in Africa, scientists embark on a dangerous mission to explore it; a declassified CIA image uncovers a bizarre, giant Soviet weapon.

Première diffusion : 7 novembre 2017

S4 E5 • Mystery of Fang Forest

A strange forest of razor-sharp stones could be home of an undiscovered Hobbit-like humanoid species; when a man-made island mysteriously appears off the US coast, new evidence points to secret government experiments into psycho-chemical warfare.

Première diffusion : 14 novembre 2017

S4 E6 • Village of the Damned

A forbidden island points to a strange South American town that locals claim was the home of Adolf Hitler. New data from NASA satellites might reveal a sunken lost continent in the Indian Ocean. A pit of bodies suggests fears of a zombie nightmare.

Première diffusion : 21 novembre 2017

S4 E7 • The Minotaur's Lair

A strange lake in Transylvania is the home of an abandoned village—and a terrifying secret. When a labyrinth is discovered on an island once home to an ancient Greek civilization, experts investigate if it was the legendary home of the Minotaur.

Première diffusion : 28 novembre 2017

S4 E8 • Lost City of Goliath

A lost city near Jerusalem might have been the home of Goliath. Bizarre underwater formations might point to a top-secret US weapons testing facility. A strange sighting in the Arctic could be a lost Nazi relic or the icy remains of prehistoric monsters.

Première diffusion : 5 décembre 2017

S4 E9 • Finding King Arthur

An abandoned megacity in a remote jungle might be the home of an ancient treasure and a dark secret; when a mysterious circular stone structure is discovered in Scotland, experts investigate whether it's the fabled Round Table of King Arthur.

Première diffusion : 12 décembre 2017

S4 E10 • Treasures of Valhalla

Evidence of human sacrifice for the Viking god Odin; shedding new light on Genghis Khan.

Première diffusion : 19 décembre 2017

S4 E3 • Ghosts of the Nazis

Bizarre images observed from space shed new light on Nazi mysteries.

Première diffusion : 28 octobre 2017

S4 E11 • Hitler's Lost Gold

New evidence might finally identify the hiding place of the billion-dollar Nazi gold train; a discovery of a long-lost settlement rewrites the history of the Vikings in North America; a blood-red river in Siberia points to catastrophic pollution.

Première diffusion : 9 janvier 2018

S4 E12 • Temple of Blood

An ancient man-made volcano might reveal buried treasure and bloody human sacrifice; when NASA discovers a strange pattern in the Arctic ice, experts investigate if it has alien origins; a mystery in the Sahara might have a sinister explanation.

Première diffusion : 16 janvier 2018

S4 E13 • North Korea's Forbidden Islands

Man-made islands are spotted near a North Korean missile facility. When something unexpected is found in a remote desert, experts investigate a lost city of giants. A strange discovery in Siberia could reveal a secret mission to the center of the earth.

Première diffusion : 23 janvier 2018

S4 E14 • Cannibals in the Ghost City

An abandoned city in the African jungle may be haunted by the malevolent spirits of cannibals; Mount Vesuvius shows signs of an awakening, and the mafia could be to blame; experts investigate Adolf Hitler's secret Nazi UFO program.

Première diffusion : 30 janvier 2018

S4 E15 • Curse of Medusa

Researchers investigate a strange glowing lake reported to turn things into stone; a structure in Africa that resembles Stonehenge is said to be the resting place of a mythical giant.

Première diffusion : 6 février 2018

S4 E16 • Nazi Stonehenge

A mysterious Stonehenge-like structure in Russia may have links to the Nazis; experts uncover clues to a mega-tsunami with the power to devastate the United States; a huge lake appears in the Sahara overnight.

Première diffusion : 13 février 2018

S4 E17 • Hunting the Ark of the Covenant

New discoveries lead investigators to a crypt rumored to hold the Ark of the Covenant; when a great white shark is killed, experts suspect a mysterious ocean monster; strange markings in the desert might be a tribute to an ancient spider god.

Première diffusion : 20 février 2018

S4 E18 • Forbidden City of Inca Gold

Treasure hunters have searched for a lost Incan city of untold wealth for a century, but new technology might finally locate its riches; a strange mountain in Egypt sparks an investigation into Cleopatra's gems and the tomb of Alexander the Great.

Première diffusion : 27 février 2018

S4 E19 • Ghost Ship of Hell Island

A ghost ship is found abandoned on a remote island that's home to one of the world's last uncontacted tribes. A strange labyrinth in Sicily might have a sinister connection to the Mafia. New evidence reveals a mysterious military compound in Russia.

Première diffusion : 6 mars 2018

S4 E20 • Mayan Armageddon: The New Evidence

New evidence might reveal how the Mayans vanished; when scientists investigate an abandoned settlement, they discover traces of ritualistic drug binges from the ancient world; a mysterious symbol in the desert points to a sex cult of millionaires.

Première diffusion : 13 mars 2018