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A father and son see mysterious lights near their property and call the sheriff's office. A large craft covers a French town in an odd material.

Local authorities receive over 50 UFO reports in the Chicago area on Halloween night. Multiple sightings of a large flying craft in PA are known as the Buck's County Wave.

For decades, claims of extraterrestrial presence on Earth have been made - and the government have gone to great lengths to discredit them.

Experts investigate an ancient fortress in Peru said to have been built with laser tools. Could it prove that aliens once visited Earth.

Churchill must make crucial decisions and figure out how to navigate big changes as the war rages on and Britain makes a powerful ally. (3 of.

George Blake: While in a North Korean prison, George Blake was recruited by the Soviets to spy on the British. He was caught but escaped to the Soviet Union.

From ghostly voices to vanishing UFOs, experts investigate puzzling and mysterious signal interferences and break down the meanings behind them.

For decades, claims of extraterrestrial presence on Earth have been made - and the government have gone to great lengths to discredit them.

Experts investigate an ancient fortress in Peru said to have been built with laser tools. Could it prove that aliens once visited Earth.

Starting on the Isle of Lewis in the Outer Hebrides, witness the 5,000-year-old standing stones of Callanish, traditional Scottish blackhouses, and cut peat with a modern crofter. (2 of.

...Hate The English? Ireland: Al meets up with Andrew Maxwell to explore the fierce animosity between the English and their Irish cousins.

Churchill must make crucial decisions and figure out how to navigate big changes as the war rages on and Britain makes a powerful ally. (3 of.

From the trench to the home front hospital, a medical historian retraces the train journey made by wounded soldiers during World War I.

A sword discovered at the bottom of a river may be the famed Excalibur. Also, a doorbell cam captures possible proof of teleportation.

Malaysian Toilet Monster & The Buzzer: A large black creature emerging from a family's toilet could be some kind of mythical creature. An astronaut spots something intriguing.

Embark on an eye-opening journey as experts investigate the startling mysteries captured by satellites orbiting the Earth: from hidden worlds to unexplainable natural phenomena.

A couple spot a huge blimp-shaped craft hovering over Michigan's Lake Erie in 1988. In 1963, two sisters and their housekeeper report being knocked down by a UFO emitting flames.

In 1993, a teenage girl walking her dog in Shropshire, England, witnesses a cylindrical object in the sky. School kids in Florida report multiple UFO sightings in 1967.

Explore moments, motives and ramifications in war that have shaped recent history, from World War I and "the eleventh day of the eleventh month" to Operation Desert Storm.

Imagine free falling 30,000 feet, or being buried alive and living to tell the tale. These are some of history's most incredible survival stories.

Experts study previous reports of zombies, vampires and spirits. Could these sightings of the undead actually have been alien encounters.

The Quest for the Holy Grail: As the Third Reich rises to power, Himmler fixates on the Holy Grail as his and the Nazis' desperation to capture this ancient relic intensifies.

For decades, claims of extraterrestrial presence on Earth have been made - and the government have gone to great lengths to discredit them.

Experts investigate an ancient fortress in Peru said to have been built with laser tools. Could it prove that aliens once visited Earth.

Venture to England's South Coast, as we dive with sharks, explore the battlements of Drake's Island, uncover the origins of Scouts, and discover fossils on the Isle of Wight. (4 of.

Dan explores the turbulent history that took place within the well-preserved walls of Warwick Castle, touching on tales of betrayal, bloodshed, murder and financial woe.

A fisherman uncovers the remains of an unidentified sea creature on a beach, and a hairy creature causes panic in New Delhi.

Four US Air Force reservists are pursued by odd lights. Constable Alan Godfrey loses consciousness when he investigates a strange disruption in West Yorkshire.

A hitchhiker is terrified when lights appear to attack him. A sighting in France becomes one of the most investigated cases in UFO history.

For thousands of years, humankind has attempted to make contact with extraterrestrial beings from beyond Earth.

Experts investigate reports of strange bronze flying ships spotted during the Black Death. Could aliens have brought deadly disease to Earth.

Churchill's - and Britain's - influence begins to shrink as the Soviet Union and the United States grow into the most significant actors in the war. (4 of.

Xialong Zhang and Cao Guangzhi were two Chinese nationals who attempted to steal proprietary information from US companies for their Chinese competitors.

From ghostly voices to vanishing UFOs, experts investigate puzzling and mysterious signal interferences and break down the meanings behind them.

For thousands of years, humankind has attempted to make contact with extraterrestrial beings from beyond Earth.

Experts investigate reports of strange bronze flying ships spotted during the Black Death. Could aliens have brought deadly disease to Earth.

Set sail for Rathlin Island as we explore a Neolithic stone tool factory, a unique upside-down lighthouse and a World War II shipwreck. (3 of.

...Hate The English? Scotland. Al catches up with Fred MacAulay as they unravel the deep-seated hostility between England and neighbours to the north Scotland.

Churchill's - and Britain's - influence begins to shrink as the Soviet Union and the United States grow into the most significant actors in the war. (4 of.

The story of the Great Locomotive Chase - an attempt by Northern spies to steal steam locomotive The General during the American Civil War.

Could a breed of dogs have the power to freeze time? Do invisibility cloaks really exist? The team examine the videos and reach a verdict.

A mysterious creature is discovered in Russia, a possible genetic experiment goes wrong and a fire has a mind of its own.

Embark on an eye-opening journey as experts investigate the startling mysteries captured by satellites orbiting the Earth: from hidden worlds to unexplainable natural phenomena.

In 1966, two Ohio police officers spot a strange light in the sky, triggering a chase across state lines. An ex-military man in Florida is knocked out by a beam of light in 1965.

Four US Air Force reservists are pursued by odd lights. Constable Alan Godfrey loses consciousness when he investigates a strange disruption in West Yorkshire.

Science reveals new insights into belief and superstition in the land of the Pharaohs, from finding the long-lost 'Land of Punt' to Tutankhamun.

Witness the dark origin stories behind some of history's most notorious methods of execution, from the guillotine to the electric chair.

Warrior's Revenge: Continue the story of Odysseus, a timeless tale of adventure filled with mythological beasts and vengeful gods. But could it actually have happened.

A look at slavery in ancient Rome and how Spartacus broke out of gladiator school and started the most terrifying slave revolt in Roman history.