Sky History 2 TV Guide

The top 10 alien craft, from V-shaped objects to orbs of light to flying saucers

Part one of two. How the Channel Island of Alderney became a pre-occupation of Nazi leader Adolf Hitler and under German control was transformed into one of the most heavily fortified places on Earth. Away from prying eyes, the Nazis also established a concentration camp - the only one on British soil - amid the idyllic scenery of woodlands and silver sand beaches

Part two of two. On the orders of Adolf Hitler, the Nazi invaders of Alderney, a tiny island in the English Channel, shipped in more than 5,000 slave labourers to build an astonishing series of fortifications designed to protect the island from attack

The crucial role ships have played in international conflict over the past 500 years, beginning with the battleship's declining influence during the 20th century

This latest collection of objects comprises an intriguing 35,000-year-old box, a steam-powered gun and a monument that may have been an Aztec throne

The ancient city of Chichen Itza in Mexico, exploring the construction and purpose of ancient monuments, and how they were built without modern technology

A countdown of the top 10 alien petroglyphs around the world, from strange figures to flying craft and carvings of what appear to be astronauts

The life of self-proclaimed faith healer and psychic Edgar Cayce. He became a worldwide sensation in the early 1900s, claiming to receive visions of both the past and future

The Hawker Hurricane was the first RAF aircraft to fly over 300mph. Over half of every enemy aeroplane destroyed in the Battle of Britain was by a Hurricane, not a Spitfire

How the designer of one of the most popular car brands in history, Ferdinand Porsche, would not have seen his success without the support of Adolf Hitler

The team follows the search for artefacts from the Second World War, joining marine archaeologists in the Solent as they raise a Fairey Barracuda divebomber. Elsewhere, a dig in the Lake District tells the moving story of the Windermere Boys, and in Aldbourne in Wiltshire, archaeologists search for personal items from the most famous American unit of the US army, 'Easy Company', who were stationed there in 1943 and 1944

Alice Roberts visits a secret location in the Cotswolds, which appears to be a high-status Anglo Saxon cemetery, where she finds a very precious and fragile artefact. A team from Cardiff University is called to the bone cave of Wales to investigate medieval bones protruding from a cliff face on the Welsh coast

The actor is joined by advanced technical diver Emily Turton in north Devon, as he prepares to dive down on the wreck of a sunken steam ship. Iona II was heading to America in the early 1860s, when it went down with a mystery cargo on board that the owners went to extensive efforts to recover in secret. The pair embark on a night dive with the hope it will reveal what the owners so desperately tried to covertly retrieve. Determined to get to the bottom of the mystery, Ross also meets with a maritime historian who has uncovered Iona II's shocking purpose. Ross and maritime archaeologist Mallory Haas head to Plymouth to dive on a newly discovered wreck, and to uncover a staggering artefact that links the site to one of the most controversial and censored periods in British history - the transatlantic slave trade

Ross is joined by maritime archaeologist Mallory Haas in Plymouth to deep dive on the wreck site of 36-gun Nelsonian frigate HMS Amethyst - a legendary battle cruiser, launched in 1799, which proved one of the most successful and prolific of the Napoleonic wars. Ross makes an incredible discovery using an underwater metal detector, and the historic item reveals why the ship was such a potent weapon of war, but also gives clues as to how and why it sank

A countdown of the top 10 alien petroglyphs around the world, from strange figures to flying craft and carvings of what appear to be astronauts

The life of self-proclaimed faith healer and psychic Edgar Cayce. He became a worldwide sensation in the early 1900s, claiming to receive visions of both the past and future

In Guatemala, an old site made up of a series of strange structures is found. On a remote island, a lake full of jellyfish is studied. Argentinian researchers find a complex that may have a dark past, while a flower found in Sumatra gives off a foul scent

Archaeologists find an ancient structure built on granite columns, puzzling stone spheres are found in Costa Rica and Mexican skeletal remains emerge