Evidence suggests aliens are hiding in the unexplored depths of the ocean. Experts investigate reports of ghost ships haunting the seas around Alaska.

A famous UFO case occurs above Alaska when an unidentified flying object pursues a Boeing 747. Locals suspect a monstrous bird stalks the skies.

Colton is fishing on a lake when something in the woods catches his eye. Is he being stalked by a pale humanoid creature?

A teenager sneaks out of her home to go on a double date. But she soon finds herself attacked by what she believes is an aggressive dogman.

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?

In 1918 the SS Princess Sophia mysteriously sank near Juneau, Alaska. Experts look for answers to the shipwreck as a ghost hunter tries to contact her victims.

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?

An Apollo 17 photo seems to show a US military outpost on the Moon and is life in the oceans of Jupiter's moons? Plus Neil Armstrong faces real danger.

In 1962, three convicts try to escape from Alcatraz prison. Officials believe the men drowned, but a scientific experiment suggests they made it to shore.

In 2009, an Air France flight disappears, but could this tragedy happen again? After a huge area of Siberian forest is destroyed, it's a race to find the culprit.

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?

Experts investigate reports of a secret alien base deep inside Alaska's highest mountain. Video evidence suggests extra-terrestrial activity in Fairbanks.

Neil is on the brink of reopening the Motherlode mine for tourism, but a new arrival puts Neil's empire at risk. Jeremy begins a new venture to grow his family farm.

Neil seeks help from McCarthy's unlikeliest resident to pursue his mine tour project. Tim gets a reminder of home when Mark pays him a surprise visit.

Why was Las Vegas a Nazi target for wartime sabotage, a test ground for Atomic Bombs, and a meeting place for 9/11's terrorists?

From the rallies held at Madison Square Garden, to the plots to steal the secrets to the nation's weapons of war, the American Nazis terrorised the USA in the 1930s.

An amateur photographer captures floating orbs on camera. UFOs seemingly circle a larger, egg-shaped mother ship floating high above Anchorage.

A legendary beast attacks a cabin on the Aleutian Islands. A UFO pursues a woman as she drives through an extra-terrestrial hot spot.

Amy and Adam visit an old Masonic temple shrouded in mystery and local lore. They soon realise they may be investigating a cold case murder.

In Massachusetts, the team investigates the home of the alleged murderer, Lizzie Borden. Was she responsible for the crimes, or under the control of a dark force?

The team heads to Georgia to investigate the site of a tragic 1900 train crash. Could the engine have been cursed, or is an unseen force at play in the town?

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