Series examining 75 million years of alien evidence on Earth. Discover what secrets extraterrestrials may have left behind and how spacemen might have shaped our world. (S2, ep 1)
Ancient Aliens
Ancient Aliens explores the controversial theory that extraterrestrials have visited Earth for millions of years. Have aliens shaped human history?
Episodes
Season Season 2 Episode Guide
1 - Alien Devastations
2 - Gods & Aliens
Gods & Aliens: Why do many cultures tell similar tales of monsters and giants? Could they be eye-witness accounts of extraterrestrials? Series exploring evidence of aliens. (S2, ep 2)
3 - Mysterious Places
Mysterious Places: From Mexico's mystifying Zone of Silence, to Markawasi Plateau in Peru, known for its frequent UFO sightings, were these the homes of ancient aliens? (S2, ep 3)
4 - Aliens Contacts
Aliens Contacts: Could aliens have told Joan of Arc how to beat the English army? And could a US serviceman have received a message when he touched a spaceship? Experts investigate.
5 - Aliens And The Third Reich
Aliens And The Third Reich: During WWII, rumours spread that an aircraft had been built from extraterrestrial blueprints. Were aliens helping Hitler's quest for world domination? (S2, ep 5)
6 - Alien Tech
Alien Tech: Investigation into whether advanced technologies such as lasers and sonic weapons are merely rediscovered tools used by advanced beings in the past. (S2, ep 6)
7 - Underground Aliens
Underground Aliens: From a cave in Ecuador said to hold tablets containing alien knowledge, to an underground city in Turkey, explore supposed extraterrestrial lairs. (S2, ep 7)
8 - Angels And Aliens # 13
Angels And Aliens: Biblical texts describe winged creatures carrying messages from the heavens. But are angels merely the product of the imagination - or do they really exist? (S2, ep 8)
9 - Unexplained Structures # 14
Unexplained Structures: Could aliens have helped humans build huge ancient structures? Experts ask whether standing stones in France, were a GPS system for ancient spacecraft. (S2, ep 9)
10 - Underwater Worlds # 15
Underwater Worlds: Ruins in Peru support legends of a sunken UFO base and Indian texts talk of water worlds populated by aliens. Could aquatic cities prove that aliens visited? (S2, ep 10)
Season Season 3 Episode Guide
1 - Aliens And The Old West # 1 (17)
Aliens and the Old West: Could aliens have already landed on Earth? Experts visit the Texas cemetery believed to hold the body of a life form that crashed there in 1897. (S3, ep 1)
2 - Aliens And Monsters # 2 (18)
Aliens And Monsters: Experts explore a Hindu scripture describing a huge flying creature that landed on Earth. Could this monster have been an alien craft from outer space? (S3, ep 2)
3 - Aliens And Sacred Places # 3 (19)
Aliens And Sacred Places: Experts explore evidence suggesting Mecca's Grand Mosque and Jerusalem's Temple Mount were the ancient meeting places of man and extraterrestrials. (S3, ep 3)
4 - Aliens And Temples Of Gold # 4 (20)
Aliens And Temples Of Gold: Experts examine beliefs that a French church provides a gateway to another universe. Plus, could the Sphinx be built on a library left by aliens? (S3, ep 4)
5 - Aliens And Mysterious Rituals # 5 (21)
Aliens And Mysterious Rituals: Experts question whether the notion of rituals, such as funerals and festivals, was brought to earth by ancient extraterrestrial visitors. (S3, ep 5)
6 - Aliens And The Ancient Engineers # 6 (22)
Aliens And The Ancient Engineers: Experts investigate an ancient fortress in Peru said to have been built with laser tools. Could it prove that aliens once visited Earth? (S3, ep 6)
7 - Aliens Plagues And Epidemics # 7 (23)
Aliens, Plagues And Epidemics: Experts investigate reports of strange bronze flying ships spotted during the Black Death. Could aliens have brought deadly disease to Earth? (S3, ep 7)
8 - Aliens And Lost Worlds # 8 (24)
Aliens And Lost Worlds: Experts search for proof of alien visitors in the ruins of lost civilisations. Could Mayan carvings reveal a city once ruled by otherworldly beings? (S3, ep 8)
9 - Aliens And Deadly Weapons # 9 (25)
Aliens And Deadly Weapons: From gunpowder to missiles, were these lethal weapons the product of human innovation, or were they created with help from another, otherworldly source?
10 - Aliens And Evil Places # 10 (26)
Aliens And Evil Places: Experts investigate creepy places associated with death. Could otherworldly connections be responsible for strange disappearances and suicides?
11 - Aliens And America's Founding Fathers # 11 (27)
Aliens And America's Founding Fathers: Could the Founding Fathers have hidden secrets about ancient aliens in their documents, buildings and symbols? Experts investigate. (S3, ep 11)
12 - Aliens And The Creation Of Man # 12 (28)
Aliens And The Creation Of Man: Experts investigate the mysterious Creation of Man, asking whether unexplained advances in human evolution could have been down to aliens. (S3, ep 12)
14 - Aliens And The Secret Code # 14 (30)
Aliens And The Secret Code: Experts scrutinise prehistoric ruins, asking whether humans could have built these advanced structures alone. Might they have had alien help? (S3, ep 14)
15 - Aliens And The Undead # 15 (31)
Aliens And The Undead: Experts study previous reports of zombies, vampires and spirits. Could these sightings of the undead actually have been alien encounters? (S3, ep 15)
16 - Aliens Gods And Heroes # 16 (32)
Aliens Gods And Heroes: Ancient alien theorists explore the origins of mythical gods. Could these tales of superhuman beings be based on sightings of extraterrestrials? (S3, ep 16)
Season Season 4 Episode Guide
1 - Mayan Conspiracy # 1 (33), The
The Mayan Conspiracy: Experts investigate startling evidence suggesting that the Ancient Maya conspired with aliens. Was this how they acquired their knowledge of astrology? (S4, ep 1)
2 - Doomsday Prophecies # 2 (34), The
The Doomsday Prophecies: Experts scrutinise the Maya Calendar, which predicted the world would end in 2012. Could it have anticipated the arrival of an extraterrestrial god? (S4, ep 2)
3 - Greys # 3 (35), The
The Greys: Experts investigate the 'greys' - mysterious beings with big heads and eyes found carved into rocks. Who are these strange figures and what inspired them? (S4, ep 3)
4 - Aliens And Mega-Disasters # 4 (36)
Aliens And Mega-Disasters: Did Mother Nature cause the volcanoes, earthquakes and floods of ancient times? Or could aliens have been responsible? Experts investigate. (S4, ep 4)
5 - Nasa Connection # 5 (37), The
The Nasa Connection: Experts open up NASA and secret government files. Can they find proof of alien contact in the recent or ancient past? (S4, ep 5)
6 - Secrets Of The Pyramids # 6 (38)
Secrets Of The Pyramids: Experts explore the similarities between huge pyramids across the world. Could extraterrestrials have influenced their construction and design? (S4, ep 6)
7 - Aliens And Bigfoot # 7 (39)
Aliens And Bigfoot: Ancient astronaut theorists hunt for evidence linking Bigfoot to alien species from the distant past. Could the ape-like giant be an extraterrestrial? (S4, ep 7)
8 - Einstein Factor # 8 (40), The
Einstein Factor: Ancient astronaut experts believe the minds of Einstein and Galileo were superhuman. Could these historical geniuses have had extraterrestrial connections? (S4, ep 8)
9 - Aliens And Cover-Ups # 9 (41)
Aliens And Cover-ups: In 1980, a man received a code after touching an alleged spaceship. After the sequence was translated, he was told never to speak of the incident again. (S4, ep 9)
10 - Alien Power Plants # 10 (42)
Alien Power Plants: Ancient alien theorists ask whether the Greeks and Egyptians understood electricity. Could extraterrestrials have introduced them to such technology? (S4, ep 10)
11 - Da Vinci Conspiracy # 11 (43), The
The Da Vinci Conspiracy: Experts scrutinise the paintings, journals and technical drawings of Leonardo Da Vinci. Could they hide evidence of extra-terrestrial beings? (S4, ep 11)
12 - Time Travellers # 12 (44), The
Time Travellers: Scientists explore the possibility that sightings of alien beings or UFOs may be evidence of time travellers from the future. (S4, ep 12)
13 - Aliens And Dinosaurs # 13 (45)
Aliens And Dinosaurs: Theorists investigate a depiction of a stegosaurus found at Angkor Wat in Cambodia. Could it suggest that alien species killed off the dinosaurs? (S4, ep 13)
14 - Mystery Of Puma Punku # 14 (46), The
Mystery Of Puma Punku: No one knows who designed and built Bolivia's sophisticated temple complex. Could it have been aliens? Experts investigate. (S4, ep 14)
15 - Destination Orion # 15 (47)
Destination Orion: Experts question ancient civilisations' fixation with the Orion constellation. Could this star group have been an entry point for aliens visiting Earth? (S4, ep 15)
Season Season 5 Episode Guide
1 - Secrets Of The Tombs # 1 (48)
Secrets Of The Tombs: Experts question the startling similarities in burial tombs from distant cultures, asking if aliens could have influenced their complicated designs. (S5, ep 1)
2 - Prophets & Prophecies # 2 (49)
Prophets & Prophecies: Did prophets such as Elijah and Joseph Smith communicate with a heavenly source or did they actually come into contact with extraterrestrials? (S5, ep 2)
3 - Beyond Nazca # 3 (50)
Beyond Nazca: Ancient alien theorists explore the mysterious phenomena of the Nazca Lines. Could these huge geoglyphs in Southern Peru have an extraterrestrial connection? (S5, ep 3)
4 - Strange Abductions # 4 (51)
Strange Abductions: Experts scrutinise The Bible for evidence of alien abductions. Could extraterrestrials have been kidnapping humans for thousands of years? (S5, ep 4)
5 - Monoliths # 5 (52)
Monoliths: A look at how ancient man could have built huge stone monoliths without advanced tools or technology. Could they have had extra-terrestrial help? (S5, ep 5)
6 - Viking Gods # 6 (53)
Viking Gods: Ancient alien experts investigate the mysterious and fearsome Norse Gods. Were they divine? Or could the all-powerful Vikings have been guided by aliens? (S5, ep 6)
7 - Von Daniken Legacy # 7 (54)
Von Daniken Legacy: A look at the controversial ancient alien theories of Erich von Däniken, whose books have sold over 65 million copies worldwide. (S5, ep 7)
8 - Emperors, Kings And Pharaohs # 8 (55)
Emperors Kings And Pharoahs: Could ancient rulers have had otherworldly links? Experts examine whether history's most powerful leaders were 'chosen' and guided by aliens. (S5, ep 8)
9 - Alien Operations # 9 (56)
Alien Operations: Experts investigate reports of bird-like figures that practised advanced medical science in ancient times. Could they have been extra-terrestrial? (S5, ep 9)
10 - Mysterious Relics # 10 (57)
Mysterious Relics: Experts investigate mysterious relics that have been revered by cultures for millennia. Could these sacred items truly hold divine or otherworldly power? (S5, ep 10)
11 - Satan Conspiracy # 11 (58), The
Satan Conspiracy: New interpretations of ancient texts indicate that Satan may have been extraterrestrial. Could these new theories about the ruler of Hell be true? (S5, ep 11)
12 - Anunnaki Connection # 12 (59), The
Anunnaki Connection: Theorists search ancient texts for proof that extraterrestrials influenced the miraculous advances made by the Sumerian civilisation 5,000 years ago. (S5, ep 12)
13 - Crystal Skulls # 13 (60), The
Crystal Skulls: Experts explore the controversy surrounding the ancient Crystal Skulls, asking what powers might be unleashed if all 13 artefacts were brought together. (S5, ep 13)
14 - Power Of Three # 14 (61), The
The Power Of Three: Experts investigate the power of the number three in history, science and astronomy. Could its huge significance bear links to extraterrestrial life? (S5, ep 14)
15 - Magic Of The Gods # 15 (62)
Magic Of The Gods: Experts search ancient accounts of magic for evidence suggesting that the wizards and witches of yesteryear were given otherworldly knowledge by aliens. (S5, ep 15)
Season Season 6 Episode Guide
1 - Aliens And Forbidden Islands #1 (63)
Aliens And Forbidden Islands: Experts investigate why so many UFOs have been spotted near remote islands. Could these far-removed spots be the earthly homes of aliens? (S6, ep 1)
2 - Aliens And The Lost Ark #2 (64)
Aliens And The Lost Ark: Theorists investigate whether sought-after religious relic the Ark of the Covenant could hold connections to our extraterrestrial past. (S6, ep 2)
3 - Aliens And Mysterious Mountains #3 (65)
Aliens And Mysterious Mountains: Throughout time, people have believed mountains were the home of the divine. But could these hilltop spirits have been extraterrestrials? (S6, ep 3)
4 - Aliens In America #4 (66)
Aliens In America: Experts investigate strange carvings from 8,000 BC and unexplained sightings in the New World. Is there more to the US's past than history books suggest? (S6, ep 4)
5 - Aliens And Stargates #5 (67)
Aliens And Stargates: Experts investigate remote ruins, mysterious caves and legendary mountain portals. Could these alleged stargates have brought ancient aliens to Earth? (S6, ep 5)
6 - Star Children #6 (68), The
The Star Children: Experts comb history for evidence of children with strange abilities and great knowledge. Could these young people have been born from ancient aliens? (S6, ep 6)
7 - Treasures Of The Gods #7 (69)
Treasures Of The Gods: Across the world, there are stories of treasures that have been lost for centuries. Could these ancient relics have been hidden by extraterrestrials? (S6, ep 7)
8 - Aliens And The Red Planet #8 (70)
Aliens And The Red Planet: Experts question what probes on Mars may have found over the past 40 years. Could NASA be hiding proof of life on the Red Planet from the public? (S6, ep 8)
9 - Shamans #9 (71), The
The Shamans: Throughout history, spiritual leaders known as shamans have healed, protected and advised. Could they really be in contact with extraterrestrial realms? (S6, ep 9)
10 - Aliens And Insects #10 (72)
Aliens And Insects: Could insects have descended from extraterrestrials? Experts investigate whether Earth's 10 quintillion critters could have dangerous links to aliens. (S10, ep 10)
11 - Alien Breeders #11 (73)
Alien Breeders: Theorists ask whether a currently unidentified species represented in our DNA could be a result of breeding between humans and aliens in the remote past. (S6, ep 11)
12 - Reptillians #12 (74), The
Reptillians: Experts question whether ancient myths provide evidence that reptillian aliens are more than just pop-culture creations and staples of science-fiction. (S6, ep 12)
13 - Aliens & Superheroes #13 (75)
Aliens & Superheroes: Experts investigate whether ancient tales of beings with super-human powers could be inspired by extra-terrestrials who came to Earth in the past. (S6, ep 13)
14 - Tesla Experiment #14 (76), The
Tesla Experiment: Inventor Nikola Tesla claimed to have direct communication with beings on other planets. Could this genius scientist have been a human 'receiver'? (S6, ep 14)
15 - Alien Encounters #15 (77)
Alien Encounters: Ancient Astronaut Theorists investigate how ancient aliens may have helped to guide and define mankind in the remote past. (S6, ep 15)
16 - God Particle #16 (78), The
The God Particle: Experts question what the God Particle reveals about the origin of our world and whether clues to its significance could have been left by ancient aliens. (S6, ep 16)
Season Season 7 Episode Guide
1 - Mysteries Of The Sphinx (79)
Mysteries Of The Sphinx: Theorists offer compelling evidence suggesting that the ancient monolith thought to depict Egyptian pharaoh Khafra once represented an alien being. (S7, ep 1)
2 - Alien Resurrections (80)
Alien Resurrections: Ancient alien theorists delve into the incredible stories of people who claim they mingled with celestial beings while they were on the brink of death. (S7, ep 2)
3 - Forbidden Caves (81)
Forbidden Caves: Could Earth's deepest caves hide secret conduits to other worlds? Or harbour evidence that aliens once visited our planet? Experts investigate. (S7, ep 3)
4 - Aliens Among Us (82)
Aliens Among Us: Are we being watched by otherworldly beings? Experts make surprising discoveries as they explore the ancient past for evidence of alien overseers. (S7, ep 4)
5 - Genius Factor (83), The
The Genius Factor: History's greatest geniuses have often said their ideas came from visions or hallucinations. But could they have come from aliens? Experts investigate. (S7, ep 5)
6 - Secrets Of The Mummies (84)
Secrets Of The Mummies: Experts investigate the mysterious origins of mummification. Could this global practice be proof that aliens once visited Earth? (S7, ep 6)
7 - Alien Messages (85)
Alien Messages: Could extraterrestrials have left us clues to the universe's mysteries? Experts investigate cryptic puzzles that might have been left by ancient aliens. (S7, ep 7)
8 - Great Flood (86), The
The Great Flood: Experts find evidence suggesting that ancient aliens saved humanity from great floods sent by the gods. Can we rely on extra-terrestrials to save us again? (S7, ep 8)
9 - Vanishings (87), The
The Vanishings: Experts explore the disappearance of civilisations throughout time and across the globe. Could clues left in their wake point to an otherwordly explanation? (S7, ep 9)
10 - Aliens And The Civil War (88)
Aliens And The Civil War: Experts examine the link between aliens and the Civil War, exploring Abraham Lincoln's strange visions and ghostly images seen at Gettysburg. (S7, ep 10)
11 - Hidden Pyramids (89)
Hidden Pyramids: Experts investigate ancient man's apparent obsession with building pyramids, and whether extra-terrestrials may have helped with their construction. (S7, ep 11)
12 - Alien Agenda (90), The
The Alien Agenda: Ancient alien theorists investigate evidence suggesting that extraterrestrials have played a pivotal role in the progress of mankind. (S7, ep 12)
Season Season 8 Episode Guide
1 - Aliens And Robots
Aliens And Robots: Experts investigate ancient tales and accounts of robots. If these sophisticated machines did exist in bygone days, what might have happened to them? (S8, ep 1)
2 - Aliens B.C
Aliens B.C: Experts investigate whether the stories of a time when gods and otherworldly beings inhabited the planet are more than mere mythology. (S8, ep 2)
3 - Nasa's Secret Agenda
NASA's Secret Agenda: Experts investigate whether rocket scientist Wernher von Braun might have found inspiration in technology found at the alleged UFO crash in Roswell. (S8, ep 3)
4 - Dark Forces
Dark Forces: From Rasputin to the Nazis, many people throughout history are thought to have tapped into dark powers. Could they have been connecting with extraterrestrials? (S8, ep 4)
5 - Alien Evolution
Alien Evolution: A look at the accounts of modern-day alien abductees. Plus, could the bizarre Paracas skulls discovered by Julio Tello be of extraterrestrial origin? (S8, ep 5)
6 - Other Earth, The
The Other Earth: Ancient Alien theorists explore world mythology as they investigate whether extraterrestrials could be responsible for our existence. (S8, ep 6)
7 - Creatures Of The Deep
Creatures Of The Deep: Experts investigate whether alien life forms are thriving in our seas, following Russian cosmonauts' discovery of living plankton in space. (S8, ep 7)
8 - Circles From The Sky
Circles from the Sky: Crop circles are a global phenomenon, with 10,000 seen worldwide. But are these strange patterns simply a hoax or could they be proof of UFO activity? (S8, ep 8)