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Just after takeoff, a plane plummets to the ground, killing all on board. Investigators find one of the causes to be out of date passenger weight calculations. 7+.

Zhangjiajie: Climbers Tagir Izmailov and Xiao Ting explore Zhangjiajie's otherworldly landscape, which inspired the movie Avatar. (S2, ep 2) 7+.

The UK's engineering wonders revealed: including innovative electric flying machines, ingenious skyscrapers and a mega-stadium with a historical twist. (1 of 6) 7+.

The boys head to Tim's hometown to rescue a rare road going version of the early 90s World Rally Championship Celica, driven by Calos Sainz Snr. (S13, 2 of 10) 7+.

A look at one of the world's worst industrial catastrophes. On 3 December 1984, 3,000 people in Bhopal, India choked to death after a leak of toxic gas. 7+.

The pilots blamed bad weather when their plane slammed into the ground, but investigators discovered a very different cause of the crash.

Former members of Hitler's SS speak openly about their part in one of the most powerful and feared organisations in Nazi Germany. (1 of.

Former members open up about their time in the SS - the paramilitary organisation ordered by Hitler to eradicate enemies of the Nazi regime. (2 of.

As time runs out, archaeologists risk everything to uncover lost chambers and rescue treasures. 7+.

Technology reveals a hotbed of volcanoes and earthquakes under the Pacific ocean, including catastrophic threats lying off Seattle and New Zealand. (S1, ep 1) 7+.

Told from a unique aerial perspective, discover the story of the longest military campaign of World War II as the Nazis attempt to starve Britain. 7+.

Ninety-five people died when TAM Airlines flight 402 crashed seconds after take-off in 1996. Experts investigate what went so tragically wrong. 7+.

From footage of Hitler relaxing in his Alpine retreat shot by Eva Braun, to haunting images of Jewish persecution, see the true story of World War II.

Footage reveals hidden stories behind the collapse of France, from German soldiers celebrating on the Dunkirk beaches, to French civilians fleeing the Nazi advance.

Fast tracked by Hitler, the Luftwaffe grew from nothing into an advanced air force that contained some of the deadliest technology of World War II. 7+.

Evidence from the disappearance of EgyptAir Flight 804 leads investigators to theorise different causes for the plane's demise. (S22, ep 10) 7+.