Nat Geo+1

7+.

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Humanitarian crises intensify under the cover of darkness - but the discovery of an explosive in the port is anything but routine. (3 of 8) 7+.

Who's At The Controls? The pilots of an Eastern Airlines flight became concerned that their landing gear was not locked for landing. Did this distraction cause the plane to crash? 7+.

The mid-10th-century reign of Harald Bluetooth marked the start of a second Viking age, but it was not to last. Discover the final days of the Vikings. (S1, ep 6) 7+.

Rob Kraft is hunting for Musashi, the biggest battleship ever built and considered to be unsinkable by the Japanese. (S1, ep 7) 7+.

Discover the machines making the coldest parts of our world inhabitable, from ice breakers to snow ploughs to an all-terrain vehicle. (S1, ep 4) 7+.

Landscape gardener Darren's 1986 Rover SD1 was once his pride and joy, but when tragedy struck it ended up rotting away in a dirty lock up. Can Car SOS come to the rescue.

Air traffic controllers hear an explosion when an Air Algérie flight lifts off. Moments later, the Boeing 737-200 crashes in the Sahara. (3 of 10) 7+.

Rauray, Normandy, 1944: British commander John Semken's Sherman faces a German Tiger just 110 metres away. Against all odds, he triumphs, revealing why the Allies were winning. 7+.

From a steamboat in a cornfield to the true story behind Hurricane Katrina's floods, discover how the Mississippi river shaped America. (S4, ep 10) 7+.

Bjoern joins forces with a rival company to rescue a truck that crashed into a cliff face, and Thord takes on a flipped tractor.

Asbestos was a product that seemed too good to be true - because it was. Meanwhile, in New York, two buildings explode sending debris flying through the streets. (S1, ep 7) 7+.

In 2005 a passenger jet crashed into the Mediterranean Sea. Follow the consequent criminal investigation which resulted in 9 men being charged with negligence. 7+.

World War Two left a great number of ships and submarines hidden beneath the waves. If the oceans were drained, what secrets would each vessel reveal? 7+.

Dr Robert Ballard dives into Turkish waters to discover the ships and submarines wrecked during the bungling of the WWII Gallipoli campaign and the heroic stories of their crews. 7+.

On a remote island, Matty makes a move with a home that is far from new and Billy races to replace his ailing roof before the Canadian winter arrives.