Sky History 2 Tuesday

How dozens of megalithic sites across the globe were designed to emanate the exact same frequency allowing humans to connect with extraterrestrial forces

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

A stroll through Great Sand Dunes National Park and Preserve in southern Colorado, where strange lights, animal mutilations and other bizarre incidents have been spotted

A look at Cleveland National Forest, where reports of gun-wielding ghosts, savage creatures and otherworldly portals are rife

Deep in the Everglades, Troy recruits an army of swampers to investigate strange noises and reports of a possible beast known as the Skunk Ape probing his friend Dusty's homestead

The contestants next challenge is to make drinking glasses and decanters in a combination of fashion and function

Towels and toothpaste come to life on a grand scale as the remaining contestants reimagine everyday bathroom objects as whimsical works of pop art

How dozens of megalithic sites across the globe were designed to emanate the exact same frequency allowing humans to connect with extraterrestrial forces

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

A trip to Crater Lake National Park in southern Oregon, rumoured to be the epicentre of dark and sinister forces from Native American lore that lure visitors to their deaths

A trip to Canyonlands National Park in south-eastern Utah, where a demonic truck driver, disembodied voices, nightmarish skinwalkers and a time loop are all reported to exist

Efforts to solve the last great mystery of the Battle of the Little Bighorn - the location of the priceless cache of weapons taken from Custer's soldiers

The B-24 Liberator, which was used extensively in the Second World War where it served in every branch of the American-armed forces, as well as several Allied air forces and navies

The story of a deadly war that intertwines Germany, Poland, Japan, Italy and Spain as the remorseless development of weapons and bombers

Nasa footage of reported UFOs and alien presence, with comment from former Apollo astronaut Edgar Mitchell, and ex-Nasa contractor Donna Hare

The astonishing accounts of four railway journeys that changed history, including the perilous expedition that made a young Winston Churchill world famous

The mysteries of a vanishing lake, toxic hell storms, CIA-trained killer monks and polar bears that stalked stricken Second World War heroes

Strange descending lights spotted in 1980 at the now former RAF station at Woodbridge, Suffolk, by servicemen Jim Penniston, John Burroughs and Ed Casabang

Wernher von Braun was vital to Nasa's Apollo 11 mission to put a man on the moon. However, this 'American hero' had his Nazi past kept under wraps

A look at UFO sightings, terrifying abductions and other bizarre occurrences, casting new light on historic cases

The jaw-dropping world of three crazy rich ancients who built some of the largest, most luxurious palaces ever known to man

The wealthy ancients who poured their money into building the most luxurious final resting places for themselves after death

How dozens of megalithic sites across the globe were designed to emanate the exact same frequency allowing humans to connect with extraterrestrial forces

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

Wernher von Braun was vital to Nasa's Apollo 11 mission to put a man on the moon. However, this 'American hero' had his Nazi past kept under wraps

The B-24 Liberator, which was used extensively in the Second World War where it served in every branch of the American-armed forces, as well as several Allied air forces and navies

The story of a deadly war that intertwines Germany, Poland, Japan, Italy and Spain as the remorseless development of weapons and bombers

Nasa footage of reported UFOs and alien presence, with comment from former Apollo astronaut Edgar Mitchell, and ex-Nasa contractor Donna Hare

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