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Mysterious structures on an abandoned Italian island reveal a dark past. An exploration of Japan's Battleship Island reveals a troubled history. (8 of.

Intrepid marine archaeologists shine a new light on graves long lost to the depths, coaxing secrets from their forgotten bones. (S5, ep 5) 7+.

A fearsome new Nazi battleship, sets sail for the Atlantic with a mission to destroy Allied supply ships. (S3, 2 of 6) 7+.

The Allies have captured the beaches of Northern France and must now head into enemy territory. Join them on their bitter two-month march to liberate Paris. 7+.

Enjoy an aerial journey over the Alps region and encounter an impressive feat of solar panel engineering, a hot air balloon festival and the Northern Bald Ibis in flight. 7+.

Tim and Fuzz are thrilled when a Car SOS call comes in to revive a rusty old BMW 2002 Turbo. However, could this be one restoration challenge too far? (S4, ep 7) 7+.

Tim and Fuzz hope to put a smile back on Adam's face by getting his 1984 Toyota FJ40 Land Cruiser back on the road. 7+.

It's an 800-year-old icon with a state-of-the-art smoke detector - but how did Notre Dame cathedral catch fire? Plus, is there such a thing as an earthquake-proof building? (S1, ep 2) 7+.

After a Chinese airplane lands at a top-secret US Air Force base, the search is on for the cause of a deadly rollercoaster ride in the sky. (S24, 1 of 10) 7+.

Experts look into the fate of TransAsia Flight 235. Dash cam footage captured its final moments, but still the cause of its crash remained a mystery. (S16, ep 8) 7+.

Two planes collide in the skies above southern Germany and the catastrophe is witnessed by scores of people on the ground. (S24, 8 of 10) 7+.

Allies prepare for history's largest amphibious invasion as 7,000 vessels and 150,000 troops approach; Nazis rush to fortify defenses. 7+.

Rare colour footage shows how Hitler revealed his haunting mission to save Germany. But few would listen to the mediocre artist... until the 1929 economic crisis. (1 of 2) 7+.

Colour footage reveals how Germany sank into despair. With no-one to defend democracy, Hitler becomes chancellor. He advocates peace but the Nazis prepare for war. (2 of 2) 7+.

Unscrew the evil human machine that was Himmler's SS as this eye-opening documentary about the Nazis' thirst for world domination continues. (S2, ep 4) 7+.