Ancient Aliens

Experts explore the similarities between huge pyramids across the world, and hypothesise on whether extraterrestrials could have influenced their construction and design

Giorgio Tsoukalos takes a look back at the most compelling investigations of all, and events that he believes represent real encounters with extraterrestrial visitors

Experts explore the similarities between huge pyramids across the world, and hypothesise on whether extraterrestrials could have influenced their construction and design

Experts investigate the work of Nasa and secret government files relating to extraterrestrial activity, looking for proof of alien contact in the recent or distant past

Expert investigations into the possibility that reptilian aliens are more than a pop-culture creation and a favourite of works of science-fiction

Expert investigations into the possibility that reptilian aliens are more than a pop-culture creation and a favourite of works of science-fiction

Ancient astronaut theorists hunt for evidence linking Bigfoot to alien species from the distant past, and ask whether the giant ape-like creature could be an extraterrestrial

Ancient astronaut experts examine whether the minds of Einstein and Galileo could have been superhuman and explore extraterrestrial connections with the historical figures

A 20th-century British woman who stunned Egyptologists by accurately locating structures and artefacts

Ancient astronaut theorists hunt for evidence linking Bigfoot to alien species from the distant past, and ask whether the giant ape-like creature could be an extraterrestrial

Ancient astronaut experts examine whether the minds of Einstein and Galileo could have been superhuman and explore extraterrestrial connections with the historical figures

Investigations into whether ancient tales of beings with super-human powers could be inspired by extra- terrestrials who came to Earth in the past

Investigations into whether ancient tales of beings with super-human powers could be inspired by extra- terrestrials who came to Earth in the past

Experts investigate whether common human rituals may have been inspired by contact with aliens

Experts visit an ancient fortress in Peru believed to have been built by aliens using tools far more advanced than those thought to have been available to humans at the time

Experts investigate whether common human rituals may have been inspired by contact with aliens

Experts visit an ancient fortress in Peru believed to have been built by aliens using tools far more advanced than those thought to have been available to humans at the time

Experts investigate whether common human rituals may have been inspired by contact with aliens

Experts visit an ancient fortress in Peru believed to have been built by aliens using tools far more advanced than those thought to have been available to humans at the time

Experts investigate alleged sightings of UFOs during the Black Death, and examine the theory that aliens may have inflicted the disease on the human race

Experts examine the ruins left by ancient civilisations, including the Mayans, in the hope of finding evidence of extraterrestrial contact

Experts investigate alleged sightings of UFOs during the Black Death, and examine the theory that aliens may have inflicted the disease on the human race

Experts examine the ruins left by ancient civilisations, including the Mayans, in the hope of finding evidence of extraterrestrial contact

Experts investigate alleged sightings of UFOs during the Black Death, and examine the theory that aliens may have inflicted the disease on the human race

The Eisenhower Briefing Document, advising President-elect Dwight Eisenhower about top-secret scientists and government officials tasked with investigating reports of UFOs

Researchers ask if cloud computing represents the rediscovery of an ancient repository of knowledge known as the Akashic Record

Suggestions of cover-ups over the fact extraterrestrials with a superior knowledge of science and engineering landed on Earth thousands of years ago

Giorgio Tsoukalos draws on evidence from past series as he asks whether extra-terrestrials could have introduced the Greeks and Egyptians to electricity

Suggestions of cover-ups over the fact extraterrestrials with a superior knowledge of science and engineering landed on Earth thousands of years ago

Giorgio Tsoukalos draws on evidence from past series as he asks whether extra-terrestrials could have introduced the Greeks and Egyptians to electricity

Investigations into inventor Nikola Tesla's claims of communication with extraterrestrials on other planets and whether the scientist could have been a human 'receiver'

Investigations into inventor Nikola Tesla's claims of communication with extraterrestrials on other planets and whether the scientist could have been a human 'receiver'

Experts scrutinise the paintings, journals and technical drawings of Leonardo Da Vinci to establish whether they hide evidence of extra-terrestrial beings

Investigations into the possibility that sightings of alien beings or UFOs may actually be evidence of time travellers from the future

Experts scrutinise the paintings, journals and technical drawings of Leonardo Da Vinci to establish whether they hide evidence of extra-terrestrial beings

Investigations into the possibility that sightings of alien beings or UFOs may actually be evidence of time travellers from the future

Theorists investigate how ancient aliens may have helped to guide and define mankind in the remote past

Theorists investigate how ancient aliens may have helped to guide and define mankind in the remote past

Theorists investigate a depiction of a stegosaurus found at Angkor Wat in Cambodia, comtemplating whether it suggest that alien species killed off the dinosaurs

A team of scientists examines the remains of the Puma Punku temple in Bolivia in a bid to determine whether it could have been designed and constructed by extraterrestrials

Theorists investigate a depiction of a stegosaurus found at Angkor Wat in Cambodia, comtemplating whether it suggest that alien species killed off the dinosaurs

A team of scientists examines the remains of the Puma Punku temple in Bolivia in a bid to determine whether it could have been designed and constructed by extraterrestrials

Investigating what the God Particle reveals about the origins of the world, and whether clues to its significance could have been left by ancient aliens

Investigating what the God Particle reveals about the origins of the world, and whether clues to its significance could have been left by ancient aliens

A team of experts looks into the Orion constellation to investigate whether this could have been an entry point for aliens visiting Earth

Experts investigate the similarities in burial tombs from distant cultures, and question whether aliens could have influenced their complicated designs

Experts investigate mysterious relics that have been revered by cultures for millennia, considering if these sacred items truly hold divine or otherworldly power

A team of experts looks into the Orion constellation to investigate whether this could have been an entry point for aliens visiting Earth

Experts investigate the similarities in burial tombs from distant cultures, and question whether aliens could have influenced their complicated designs

Unexplained phenomenon in Britain, from Stonehenge to crop circles and UFO sightings - including the famous Rendlesham Forest incident

The suggestion that mythological tales of Norse deities, such as Odin and Thor, were inspired by real encounters with extraterrestrial beings

Experts investigate mysterious relics that have been revered by cultures for millennia, considering if these sacred items truly hold divine or otherworldly power

Throughout history, there are stories of strange beings unlike anything known to exist on Earth. This documentary investigates whether they could be more than just mythology

Throughout history, there are stories of strange beings unlike anything known to exist on Earth. This documentary investigates whether they could be more than just mythology

Investigations into whether prophets such as Elijah and Joseph Smith communicated with a heavenly source, or came into contact with extraterrestrials

Investigations into whether prophets such as Elijah and Joseph Smith communicated with a heavenly source, or came into contact with extraterrestrials

The possibility that extraterrestrial beings helped build mysterious devices such as a 2,000-year-old computer, a power plant inside the Great Pyramid and a Nazi-era time machine

The possibility that extraterrestrial beings helped build mysterious devices such as a 2,000-year-old computer, a power plant inside the Great Pyramid and a Nazi-era time machine

A look at whether aliens could conceivably have been involved in the development of lethal weapons, from gunpowder to missiles

Experts investigate macabre places associated with death, and question whether otherworldly connections could be responsible for strange disappearances and suicides

William Shatner brings thought-provoking questions to leading experts, and they explore everything from human origins to groundbreaking archaeological finds

A look at whether aliens could conceivably have been involved in the development of lethal weapons, from gunpowder to missiles

Experts investigate macabre places associated with death, and question whether otherworldly connections could be responsible for strange disappearances and suicides

A look at whether aliens could conceivably have been involved in the development of lethal weapons, from gunpowder to missiles

Experts investigate macabre places associated with death, and question whether otherworldly connections could be responsible for strange disappearances and suicides

A think-tank of top global experts examines whether America's founding fathers hid extra-terrestrial secrets in their documents, buildings and symbols

Experts investigate human creation, asking whether unexplained advances in evolution could have been down to aliens

A think-tank of top global experts examines whether America's founding fathers hid extra-terrestrial secrets in their documents, buildings and symbols

Experts investigate human creation, asking whether unexplained advances in evolution could have been down to aliens

A think-tank of top global experts examines whether America's founding fathers hid extra-terrestrial secrets in their documents, buildings and symbols

Experts investigate human creation, asking whether unexplained advances in evolution could have been down to aliens

The hundreds of gigantic lines, some in the shape of animals, geometric patterns and even an alien-like being, that extend through a Peruvian desert, known as the Nazca Lines

With ancient cultures telling stories of strange objects in the sky, this episode asks whether people living thousands of years ago might actually have seen extraterrestrial crafts

The hundreds of gigantic lines, some in the shape of animals, geometric patterns and even an alien-like being, that extend through a Peruvian desert, known as the Nazca Lines

With ancient cultures telling stories of strange objects in the sky, this episode asks whether people living thousands of years ago might actually have seen extraterrestrial crafts

With ancient cultures telling stories of strange objects in the sky, this episode asks whether people living thousands of years ago might actually have seen extraterrestrial crafts

The story of Travis Walton, who claims that in 1975 he was abducted and taken aboard a space ship inhabited by extraterrestrial beings

The construction of megalithic stone structures baffles stonecutters, scientists and archeologists. This edition considers whether ancient humans had a little alien help

The story of Travis Walton, who claims that in 1975 he was abducted and taken aboard a space ship inhabited by extraterrestrial beings

The construction of megalithic stone structures baffles stonecutters, scientists and archeologists. This edition considers whether ancient humans had a little alien help

The construction of megalithic stone structures baffles stonecutters, scientists and archeologists. This edition considers whether ancient humans had a little alien help

An analysis of ancient monuments, questioning what compelled man to move colossal stones long distances to build remarkably similar structures all around the world

Theorists offer compelling evidence suggesting that the ancient monolith thought to depict Egyptian pharaoh Khafra once represented an alien being

An analysis of ancient monuments, questioning what compelled man to move colossal stones long distances to build remarkably similar structures all around the world

Theorists offer compelling evidence suggesting that the ancient monolith thought to depict Egyptian pharaoh Khafra once represented an alien being