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

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

In 2014, Malaysia Airlines flight MH370 vanished without a trace. Did it crash and if so, why can't the wreckage be found?

Atlantis is one of the most famous disappearances. After thousands of years, can state-of-the-art technology finally to crack this ancient mystery?

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

In 2014, Malaysia Airlines flight MH370 vanished without a trace. Did it crash and if so, why can't the wreckage be found?

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.

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?

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?

A planet shows evidence of an Earth-like atmosphere, while a mysterious glowing light suggests the impossible: an atmosphere on the Moon.

Could spaceships really be powered by atomic bombs? Plus, why was Neil Armstrong's transmission feed cut off when he spotted strange lights on the Moon?

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 bush pilot witnesses unsettling UFO activity. A former government operative reveals top-secret coordinates to an alleged alien base.

An extra-terrestrial stalker leaves a family frozen in fear outside of Juneau, Alaska. A maritime monster nearly capsizes an aircraft on Alaska's famed Lake Iliamna.

The team heads to Sumatra in search of the elusive orang pendek. They venture into the jungle, in hopes of proving this mythical creature is in fact real.

The team travels to a notorious hotspot for Sasquatch activity. With the aid of high-tech equipment, they hope to gather more information on this mysterious creature.

Andrew heads to Croatia in search of the country's unusual and exotic foods. He tucks into roasted dormice, giant offal kebabs and grilled frog.

In Philadelphia, Andrew feasts on a variety of unusual and traditional dishes. He has cheesesteak, shad cake and turkey neck and pig liver plus more!

The team investigates a killer bear-canine hybrid. They track the creature across treacherous terrain and attempt to capture it inside of a caldron trap.

Don Wildman unearths dummy heads that helped inmates escape from Alcatraz. Plus, he examines the medical mystery surrounding a pair of conjoined twins.

The TWC are in Florida at one of the most haunted forts in the US, where they attempt to make contact with the disembodied head of a Seminole Indian Chief.

The team investigates a humanoid bipedal. They track the elusive creature through a twenty-mile cave system toward a series of snare traps.

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.