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What would happen if a UFO actually did land on Earth and humans found it? Engineers create a 'spaceship' to see how alien technology could work.
In December 1980, NATO personnel stationed in England witnessed strange lights in the sky. Aliens?
On 4 October 1967, dozens of eyewitnesses reported seeing what appeared to be a UFO hovering above the water's surface in Nova Scotia. Was it an alien ship?
In 1974, the US government was tracking a UFO when it disappeared over Coyame, Mexico. At the same time, a civilian plane crashed. Why was it all covered up?
In April 1897, an unidentified craft crashed in Aurora, Texas. Locals claimed they buried the spaceship and its alien pilot. Can a new search uncover the remains?
Through dramatic re-enactments of actual UFO classified files and expert interviews, this special explores the lengths that people on the front lines will go to keep civilians safe from extraterrestrial encounters.
Laser weapons and tele-transporters would probably all be fitted to an alien spaceship. But what if they could be used by humans too?
HG Wells' classic tale of a Martian invasion has terrified audiences for more than 100 years. The history of its many retellings is revealed.
In 1938, hundreds of mysterious stone disks were found in a cave in China. Some believe the stones are proof of contact with an alien race. Fact or fiction?
Alien abductees undergo hypnotic regression to see if there is any truth in their stories.
Some experts claim that UFO wreckage is stored in a top-secret facility in Dayton, Ohio. Former employees spin a tale of alien bodies and flying saucer debris.