UFOs circle a larger, egg-shaped mother ship floating high above Anchorage.

A UFO pursues a woman as she drives through an extra-terrestrial hot spot.

What was America's greatest sports scandal and how did it end? And what happened at the Montana hotel where two legendary Wild West vigilantes were double-crossed?

What was the government plot to risk an astronaut's life and instigate war with Cuba? And, what happened in a Pennsylvania inn that led to a Revolutionary War defeat?

The team investigates Gettysburg, Pennsylvania, site of the bloodiest battle of the Civil War, and try to make contact with the souls of these fallen American soldiers.

JFK UFO Conspiracy. A potentially disastrous fuel leak forces three astronauts to make a risky return to earth. And a NASA lunar probe reveals a mysterious crashed craft on the moon.

Josh Gates traverses England, Wales and Scotland, wading through history and legend to search for evidence of a real King Arthur.

A terrified couple calls for help after witnessing a chair levitate in their home. A psychic's visit reveals a horrifying truth that leaves Adam and Amy shocked.

Jupiter is hotter than it should be, and scientists are baffled. There's a weird discovery on Mars and detectives ask for NASA's help on a murder cold case.

The team travels to China in search of the Yeren, a bi-pedal, hair-covered ape. But will they be able to prove this creature is more than just a legend?

Mystery Of Silence And More. Don investigates the secret identity of an American founding father, a record-setting aviatrix and the origin of the modern American flag.

The team open Hans Holzer's hidden case file on the Surratt Tavern, where John Wilkes Booth hid after fatally shooting Abraham Lincoln in 1865.

Amy, Adam and Chip investigate claims of threatening paranormal activity at a historic estate in Massachusetts. The team are shocked by what they discover.

Josh Gates journeys across England to uncover the true story behind Robin Hood. He explores underground tunnels and finds what may be his final resting place.

Amy and Adam investigate the home of an author, where a ghost terrorises two girls. Is this connected to a murder that happened more than 100 years ago?

The Sun's Evil Twin. Witnesses photograph two suns in the sky over Indonesia - is this the first sighting of the Sun's dark twin that could spell imminent danger to Earth?

After coming closer than ever to proving the existence of Bigfoot in Oregon, the team continues their search in the mountains of Kentucky.

Don Wildman investigates an American president's cross-country road trip, a criminal crusader, and the secrets of a Grand Canyon adventure. S/6/13

In 1976, Hans helped a family who were terrified by the spirit of a grieving widow. The team visit Port Clyde to investigate a resurgence in paranormal activity.

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.

Savannah. The team investigates hauntings that surround Savannah's 'Hanging Square'. This square has been the epicentre of Savannah's paranormal activity for over 300 years.

The team are called by the police once again and head out to Louisiana's Atchafalaya basin where a local had reportedly seen two men vanish into thin air.

The team explore their darkest fears at an abandoned Arizona hospital. Faced with an entity that hates men, they get more evidence than they dared hope for.

The team encounters its alleged darkest, most-terrifying paranormal activity yet at a cursed sanitarium in West Virginia. What will they discover?

Jack and Katrina head to Skinwalker in Utah. They're investigating a rumoured haunted bed and breakfast, plus they look at paranormal activity in the area.