A woman claims to be under attack from an unseen force. Could it be linked to a Native American legend about a mysterious race of giants?

Guests report attacks by an aggressive spirit at a hotel. And, is a shapeshifting menace responsible for thousands of abductions in the Alaska Triangle?

A couple's hopes of a dream life in the California mountains are ruined when they stumble upon a satanic site.

Deep in the woods, a former policemen stumbles upon an abandoned lakehouse. What will he discover inside this ominous property?

After a huge cargo ship suddenly vanishes with 27 crew members on board, new evidence suggests the culprit may be a mythical rogue wave.

New technology reveals lost cities in hostile jungle - could this lead to a discovery of the mythical El Dorado? And, a crystal is found on a shipwreck.

A cryptozoologist investigates reports of a sea monster in Alaska. He reviews eyewitness accounts and examines never-before-seen video evidence.

Images of Mercury reveal massive spider-like formations on its surface. Is it an odd geological formation - or something much more ominous?

How did pictures from the Hubble telescope make the comet of the century look like an alien spacecraft? Has earth already been invaded by alien organisms?

After five planes vanish in the Bermuda Triangle, science points to a strange geological force. And, satellites reveal lost tribes in the Amazon.

The Roanoke colony vanished without a trace, and centuries later, it remains one of history's greatest unsolved mysteries. Can new evidence reveal its fate?

Could NASA really be responsible for a nuclear explosion on Jupiter? Could new evidence finally reveal the truth behind the mystery of the iconic face on Mars?

The Hubble Telescope spots thousands of unknown objects travelling faster than light. Are we being watched? Or could we ourselves be aliens from another world?

Experts examine whether an interdimensional portal in the Alaska Triangle led to the disappearance of an aeroplane carrying 44 military personnel in 1950.

Josh explores the Tayos Cave in Ecuador, seeking a legendary set of metal plates believed to be created by an advanced ancient civilization.

Josh ventures to Argentina, where many Nazi SS officers escaped to after World War II. He uncovers secret Nazi hideouts theories about Adolf Hitler's "true" fate.

Experts discuss theories related to the world's most famous cryptid, Bigfoot. Recently uncovered evidence unveils a creature far fiercer than previously believed.

Experts explore a new theory surrounding Scotland's Loch Ness Monster. The creature may not only be real, but possibly more dangerous than ever imagined.

A dangerous run-in leads the team to an astounding new clue, but a communications breakdown leaves them in the dark about an approaching storm.

The team pushes deeper into Snake Island than ever, tempting fate with every step, and they make a discovery that will change their lives.

Amy, Adam and Chip investigate an old hospital in Tennessee. Once a beacon of hope, the abandoned building is now rumoured to be haunted by a dog-like entity.

Hans Holzer conducted several investigations of Franklin Castle in Ohio. The team uncover why Hans refused to publish his findings on this mysterious case.

Jack Osbourne and Katrina Weidman head to McConnelsville in Ohio. They investigate a majestic old theatre rumoured to be haunted by a host of spooky spirits.

The team travels to Preston County to investigate a flying predator. They encounter great danger when they invade the creature's territory.