Sky History 2 Today

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

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

Experts use cutting-edge science to investigate the mysteries of ancient Egypt's elite, including Ramesses II, Imhotep, and the first female pharaoh

Part one of two. Experts construct an extraterrestrial spaceship, based on reported UFO sightings, while astronomers, physicists and engineers try to rationalise such occurrences

A trip to Great Smoky Mountains National Park, which straddles the border between North Carolina and Tennessee. It is the alleged underground base for a powerful secret society

A trip to Mark Twain National Forest: It is claimed the dark, mysterious energies that surround this national park point to treasures from a lost civilisation that is hidden there

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

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

Helen Skelton and Alex Langlands investigate the Pendle Witch trials of 1612, visiting Lancaster Castle, where the suspects were held

Part two of two. Imagining the possibility of advanced alien technology, such as invisibility cloaks, laser weapons and tele-transporters, falling into human hands

Part one of two. The violent and bloody struggles that define the culture and identity of Mexico

The eight artists are challenged to make a light fixture using techniques such as colour wrapping, hot sculpting and making bubbles with baking soda

The seven contestants put their skills into making a glassy robot prototype that can preform chores and tasks

Alice Roberts tells the story of Viking England by studying the history of York, taking part in a Viking battle and meeting the people behind a memorable archaeological find

The Dillman family completes the underwater dye test at Shadow Cave. The Villescas family makes a new discovery that could be an important clue from an old treasure hunter

Archaeological sites and historic wonders, from ancient standing-stone circles to the ruins of castles and dwellings that ancient Britons occupied for generations

Part one of two. Documentary revisiting the alleged crash of an extra terrestrial craft at Roswell, New Mexico in 1947

How earlier civilisations - such as Inca, Persian, Greek, Egyptian and Roman - still exert deep influences on modern life. This episode focuses on architecture

Sightings of unexplained 'aerial phenomena' and reports of so-called 'first contact' moments, which are supported by credible eyewitness accounts or clear video footage

The Pirate Republic of Nassau grew on attacking trade between Britain and the Americas. Edward Thatch reinvented himself and became the most devilish pirate of all - Blackbeard

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

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

Hans Kammler's fingerprints can be found all over the Third Reich's most prestigious and deadly engineering projects, including rockets and concentration camps

The mighty Inca Empire and its accomplishments, including the construction of their awe-inspiring buildings in Cusco and Machu Picchu

The eight artists are challenged to make a light fixture using techniques such as colour wrapping, hot sculpting and making bubbles with baking soda

The seven contestants put their skills into making a glassy robot prototype that can preform chores and tasks

Alice Roberts tells the story of Viking England by studying the history of York, taking part in a Viking battle and meeting the people behind a memorable archaeological find

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