Strange lights are reported by security near the East Gate of RAF Woodbridge, a US Air Force base on England's east coast. But could extra-terrestrial visitors be to blame?
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Discover the link between Nazis in New Mexico and a mystery craft in Roswell, explore Australia's underground labyrinthine abyss and decode the cypher of Atomic Island.
A volcanic island off the coast of Antarctica with a mysterious past is explored. In the Peruvian Andes, the mummified remains of a teenage girl are discovered. A shipwreck is found near Russia's Franz Josef Archipelago.
In Russia, 34,000-year-old graves are discovered. A team attempts to locate a World War II British plane that went missing in Iceland. Fossils are found in an Alaskan riverbank. In Antarctica an undiscovered depression in the ice is investigated.
If technology goes too far, too fast, a time may come when humans are no longer at the top of the evolutionary food chain.
Every culture and religion on the planet believes that an evil one will usher in the end of days. But who is this Anti-Christ? And how can we hope to stop him?
Over two nights, a silent, orange football-shaped object is spotted near the nuclear weapons storage site at Loring Air Force Base in Maine. Could alien visitors be to blame?
Strange lights are reported by security near the East Gate of RAF Woodbridge, a US Air Force base on England's east coast. But could extra-terrestrial visitors be to blame?
One of the world's best UFO hotspots is very close to home. Craig and Sarah examine the Scottish UFO phenomena — a myriad of extraordinary cases, including the 1991 sighting of a glowing red disc. This programme contains some flashing images.
Experts discuss the possibility of advanced alien technology that could allow UFOs to fly at blinding speed or hover effortlessly a few feet above the ground.
From loss of time and bizarre hazy memories, to terrifying accounts of alien surgery, these are the hidden signs of alien abduction.
A fleet of UFOs are filmed over the South China Sea - how do they seem to be able to blink in and out of existence? A 12,000-year-old archaeological site reveals carvings of alien-like, six-fingered humanoids.
Uncover new evidence pointing to the possibility that ancient man was visited by extraterrestrials, influencing architecture, art and more.
When it comes to identifying mysterious objects in our skies, few people are more qualified than pilots and astronauts - but are sightings common?
When a massive spider's web takes over a park, experts investigate if this monster's trap could capture a human. A tree spurts out thick red blood, and some believe it could be an undiscovered species of carnivorous plant.
A mysterious flame appears in the Norwegian wilderness with the fury of the Viking god Thor video footage shows a ghostly figure stalking people in Japan, providing evidence for the truth of a local legend.
Many believe that extraterrestrial secrets are not just limited to the military - so could deathbed confessions provide evidence of the existence of UFOs?
From the lore and history of ancient Egypt to the myths of Native Americans, mankind's past is riddled with the evidence of UFOs.
Over two nights, a silent, orange football-shaped object is spotted near the nuclear weapons storage site at Loring Air Force Base in Maine. Could alien visitors be to blame?
Strange lights are reported by security near the East Gate of RAF Woodbridge, a US Air Force base on England's east coast. But could extra-terrestrial visitors be to blame?
Human remains are discovered high in the Ecuadorian Andes. In Norway, an archaeology student unearths metal artefacts. A strange earthquake-like event is investigated in Canada. In Greenland, a Viking longhouse with a unique history is found.
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