Aliens at the Airport: The team investigate a strange object seen over Chicago's O'Hare Airport in 2006. Are aliens watching our airports? And if so, could they be malevolent?
Giant UFOs: The team probes some of the largest sightings of alleged UFOs ever recorded over the English Channel, including two eerie bright yellow flat objects spotted by pilots.
Giant Triangles: The team uncovers rare footage of floating giant triangles hovering over cities. Could these strange sightings be extraterrestrial in origin?
Alien Crashes: In 2008, witnesses in Needles, California, saw military helicopters carry away a glowing flying object. What was the government trying to hide?
Grey's Conspiracy: The team investigates disturbingly similar stories of alien abductions from two different countries before tracking down some potential proof in Mexico.
Underground Alien Bases: The team investigates rumours of human-alien genetic experiments reportedly going on deep below the New Mexico desert in an underground base.
Underwater Alien Bases: Do USOs - Unidentified Submerged Objects - exist? The team examine satellite images of what seem to be underwater landing strips and other strange evidence.
Giant Triangles: The team uncovers rare footage of floating giant triangles hovering over cities. Could these strange sightings be extraterrestrial in origin?
Giant UFOs: The team probes some of the largest sightings of alleged UFOs ever recorded over the English Channel, including two eerie bright yellow flat objects spotted by pilots.
Area 51 Revealed: The team heads to the epicentre of UFO and military conspiracies, Area 51, and interrogate former employees of the alleged storage site for alien spacecraft.
Alien Crashes: In 2008, witnesses in Needles, California, saw military helicopters carry away a glowing flying object. What was the government trying to hide?
Alien Fallout: After seeing an odd flying object in Texas in 1980, a woman was hospitalised as she lost clumps of hair and patches of skin. The team reopens her case.
Aliens at the Airport: The team investigate a strange object seen over Chicago's O'Hare Airport in 2006. Are aliens watching our airports? And if so, could they be malevolent?
Lost UFO Files: The team recovers physicist James McDonald's long lost research. Over 20 years, he interviewed hundreds of UFO witnesses and unearthed many government documents.
Giant UFOs: The team probes some of the largest sightings of alleged UFOs ever recorded over the English Channel, including two eerie bright yellow flat objects spotted by pilots.
Arizona Lights: On March 13, 1997, a string of fiery globes were seen over Arizona, but earlier that night some eyewitnesses saw something even more shocking.
The Real Roswell: The story of a spacecraft supposedly crashing in Roswell, New Mexico, is the most famous case in UFO history. Now, a new theory has emerged.
UFO Storm: In 2008, the UK's Ministry of Defence released decades' worth of classified UFO files to the public. One month later, UFO hysteria ripped through the country.
Alien Fallout: After seeing an odd flying object in Texas in 1980, a woman was hospitalised as she lost clumps of hair and patches of skin. The team reopens her case.
Lost UFO Files: The team recovers physicist James McDonald's long lost research. Over 20 years, he interviewed hundreds of UFO witnesses and unearthed many government documents.
Arizona Lights: On March 13, 1997, a string of fiery globes were seen over Arizona, but earlier that night some eyewitnesses saw something even more shocking.
The Real Roswell: The story of a spacecraft supposedly crashing in Roswell, New Mexico, is the most famous case in UFO history. Now, a new theory has emerged.
Invasion Illinois: Series examining UFO sightings, alien abductions and government cover-ups, beginning with an investigation into multiple sightings of bright lights in 2004.
Military vs UFOs: The team examine incidents of alleged conflicts between the US Air Force and the RAF, asking whether these encounters have been covered up.
First Contact: Experts investigate the alleged crash of an alien craft in 1897, debris of which was reportedly thrown down a well while an alien body was buried in a graveyard.
UFO Emergency: Investigation into a huge pulsating light spotted in the sky in 1994. A radar operator describes what he saw, explaining he had "never seen anything move so fast".
Invasion Illinois: Series examining UFO sightings, alien abductions and government cover-ups, beginning with an investigation into multiple sightings of bright lights in 2004.
Military vs UFOs: The team examine incidents of alleged conflicts between the US Air Force and the RAF, asking whether these encounters have been covered up.
The NASA Files: The team analyses incredible NASA footage of reported UFOs, and interviews former NASA employees who allegedly witnessed cover-ups first hand.
Vortexes: The team travels to Sedona, Arizona, long known for strange phenomena, to interview witnesses to unexplained sightings of lights and objects in the sky.
Abductions: This episode chronicles several close encounters with alien abductees who have been held captive, probed, examined, and had objects implanted in their bodies.
Alien Contact: For years, people have claimed to have had direct, personal contact with aliens. The team tracks down some of those who claim to have had such contact.
UFO Surveillance: Ever since Roswell, observers have noted that UFOs allegedly appear in locations that are already full of secrets and mystery. The question is, why?
Underwater Alien Bases: Do USOs - Unidentified Submerged Objects - exist? The team examine satellite images of what seem to be underwater landing strips and other strange evidence.
Underwater Alien Bases: Do USOs - Unidentified Submerged Objects - exist? The team examine satellite images of what seem to be underwater landing strips and other strange evidence.
UFO Surveillance: Ever since Roswell, observers have noted that UFOs allegedly appear in locations that are already full of secrets and mystery. The question is, why?
UFO Surveillance: Ever since Roswell, observers have noted that UFOs allegedly appear in locations that are already full of secrets and mystery. The question is, why?
Underwater Area 51: The team investigate the highly secretive underwater testing facility AUTEC, said to be used by the US Navy for weapons testing and underwater research.
Dark Presence: There's a growing phenomenon of alleged UFO sightings known as 'Orbs'. Witnesses who see the orbs also report having dreams, premonitions and a deep fear.
Dark Presence: There's a growing phenomenon of alleged UFO sightings known as 'Orbs'. Witnesses who see the orbs also report having dreams, premonitions and a deep fear.
Area 52: Area 51 is considered the ultimate top secret facility, but there is another military site, known as Area 52, where strange phenomena have been witnessed for 10 years.
Area 52: Area 51 is considered the ultimate top secret facility, but there is another military site, known as Area 52, where strange phenomena have been witnessed for 10 years.
Underwater Area 51: The team investigate the highly secretive underwater testing facility AUTEC, said to be used by the US Navy for weapons testing and underwater research.
Underwater Area 51: The team investigate the highly secretive underwater testing facility AUTEC, said to be used by the US Navy for weapons testing and underwater research.
Underground Alien Bases: The team investigates rumours of human-alien genetic experiments reportedly going on deep below the New Mexico desert in an underground base.
Grey's Conspiracy: The team investigates disturbingly similar stories of alien abductions from two different countries before tracking down some potential proof in Mexico.