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Across the world, there are stories of treasures that have been lost for centuries. Could these ancient relics have been hidden by extraterrestrials.

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.

An exploration into the dark art of spy-craft reveals the deadliest weapons deployed to gather information and assassinate enemies.

Raven Master Chris must introduce a new bird to the Tower's enclosure, while Constable Nicholas is in charge of the room where Guy Fawkes was interrogated.

The Code That Won the Great War: Revealing the encrypted German telegram could save Britain in its darkest hour. Can a team of geniuses decode the message in time.

A US Navy boatswain's mate sees a strange green fog in the heart of the Bermuda Triangle, while a sergeant experiences terrifying events in Iraq.

Ian takes it outside the box with some vintage tin.

Experts investigate if a series of house fires across the UK are linked to an allegedly cursed portrait.

'Death shall come on swift wings to him who disturbs the peace of the King,' so the inscription goes. Is there truly a curse that haunts the original discoverers of Tutankhamun.

Thousands of UFO sightings and abductions are reported every year. This series examines these accounts and casts new light on historic cases.

Are unusual patterns in an English field really an alien message? And why is there a secret military facility in the Nevada desert.

At the end of 1939, the German Army invades Poland. Examine how Hitler succeeded in pushing through his rearmament and war plans relatively unhindered.

A look into how the efficiency of the rail networks on both sides helped cause the stalemate of the First World War.

Theorists search ancient texts for proof that extraterrestrials influenced the miraculous advances made by the Sumerian civilisation 5,000 years ago.

Ancient alien theorists ask whether the Greeks and Egyptians understood electricity. Could extraterrestrials have introduced them to such technology.

Experts unravel the secrets of the universe's earth portals: shortcuts through space that allow travellers to span vast distances in the blink of an eye.

Discover the shocking truth about alien civilisations in our solar system. Check out derelict spacecrafts and explore the mysterious origins of UFOs.

The Peak District: On the 800th anniversary of the signing of the Magna Carta, Tony unravels the history from the myths surrounding King John and Robin Hood.

Raven Master Chris must introduce a new bird to the Tower's enclosure, while Constable Nicholas is in charge of the room where Guy Fawkes was interrogated.

Experts investigate if a series of house fires across the UK are linked to an allegedly cursed portrait.

'Death shall come on swift wings to him who disturbs the peace of the King,' so the inscription goes. Is there truly a curse that haunts the original discoverers of Tutankhamun.

Thousands of UFO sightings and abductions are reported every year. This series examines these accounts and casts new light on historic cases.

Are unusual patterns in an English field really an alien message? And why is there a secret military facility in the Nevada desert.

At the end of 1939, the German Army invades Poland. Examine how Hitler succeeded in pushing through his rearmament and war plans relatively unhindered.

A look into how the efficiency of the rail networks on both sides helped cause the stalemate of the First World War.

Tori investigate the remains of children and teenagers found in Leeds city centre. The team reveals what life was like for the children of the Industrial Revolution.

The Zodiac Killer Code reveals the desperate bid to crack the crazed codes sent by America's most mysterious serial killer.

Theorists search ancient texts for proof that extraterrestrials influenced the miraculous advances made by the Sumerian civilisation 5,000 years ago.