Sky History 2 Wednesday

A look at whether or not Area 51's notoriety acts as a cover-up to much bigger, top-secret extraterrestrial experiments taking place at multiple locations

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

The battle hit a turning point and Donitz unleashed an advanced torpedo to flip the momentum. Roberts and Laidlaw then had to devise a strategy to combat the new threat

The Queen Elizabeth, which came to an undignified end in Hong Kong Harbour after catching fire while undergoing refurbishment

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

Giorgio Tsoukalos takes a look back at the hieroglyphs, petroglyphs and geoglyphs that he believes tell a worldwide story of alien visitation

Theorists delve into the stories of people who claim to have mingled with extraterrestrial beings while they were on the brink of death

Madness frontman Suggs and militaria expert Stephen Taylor head on the trail of an iconic Mark IX Spitfire in Belgium

Dan Jones explores the turbulent history of the Tower of London, which has been a military fortress, a palace, a royal mint, a prison, a zoo and a place of execution

Alice Roberts explores the Georgian era in Bristol, taking a horse-drawn carriage ride, sampling backstreet gin, and discovering the story of the world's first chocolate factory

The story of Europe's greatest empires through 10 incredible sites, including St Basil's Cathedral, the Palace of Versailles and Schonbrunn Palace

Lacking in speed and might, the SS Andrea Doria more than made up for it in beauty, but on the night of 25 July 1956 - the Italian liner met a disastrous fate

Ted doubles down on Nick and Brandon's salvage skills and sends the boys out on their very own mission for the first time

Garth Barnard investigates the likely cause of an accident in Nebraska in 1944, when a transport plane crashed during a violent storm

After the end of the Battle of Britain came the bombing of German cities. In the war in the Pacific, the US and Japan successfully bombed naval and land targets

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

The notion that a silver orb spotted in the sky and alleged crash debris may be from a UFO. Plus, an infamous spy organisation's alleged footage of UFOs and aliens

Dr Fern Riddell and Dr Karen Bellinger examine the massive Nazca lines, which are among Peru's greatest mysteries

Giorgio Tsoukalos takes a look back at the hieroglyphs, petroglyphs and geoglyphs that he believes tell a worldwide story of alien visitation

Theorists delve into the stories of people who claim to have mingled with extraterrestrial beings while they were on the brink of death

Ted doubles down on Nick and Brandon's salvage skills and sends the boys out on their very own mission for the first time

Documentary drawing on archaeological excavations, expert commentary and historical reconstructions to delve into the mysteries, myths and arcane history of the Celts

The story of Europe's greatest empires through 10 incredible sites, including St Basil's Cathedral, the Palace of Versailles and Schonbrunn Palace

Alice Roberts explores the Georgian era in Bristol, taking a horse-drawn carriage ride, sampling backstreet gin, and discovering the story of the world's first chocolate factory

Marty Lagina joins Giorgio Tsoukalos to explore the statues, pyramids and structures left behind by one of the most mysterious cultures in the ancient world in Sardinia, Italy