Nat Geo HD

Chris Barrie takes a ride in a Back to the Future DeLorean DMC and revisits the battles of the Falklands War as he seeks out the greatest British machines. 7+.

Three catastrophic approaches provoke questions, from a turboprop disaster to an invisible culprit on the Cuban border. (S6, ep 6) 7+.

Detailing the shocking truth behind 9/11. Could anyone have stopped the attacks? Air traffic staff are among those offering a fresh take on the tragedy. 7+.

September 1939. The life of German U-Boat Commander Fritz Julius Lemp takes a series of dramatic turns as he risks the wrath of Adolf Hitler. (S3, ep 2) 7+.

In April 1940, German battleships infiltrate Norwegian fjords in a bid to seize key ports and secure Hitler's supply of iron ore. (S3, 1 of 6) 7+.

After all 301 people on board Saudia Flight 163 were killed when a fire engulfed the plane, investigators had to determine why the flames spread so rapidly. (6 of 10) 7+.

Investigators struggle to explain why PenAir 3296 failed to stop after landing at a famously tricky Alaskan airport - until they uncover the truth. (7 of 10) 7+.

In 1944, British and US troops fought together to capture the fortified German town of Geilenkirchen, a key stronghold in the Siegfried Line.

Historic texts tell of an Egyptian city in the Nile delta. Can draining the waters of the Mediterranean reveal this metropolis in all its former glory? 7+.

Thord and Erlend get spooked trying to rescue a van beside a graveyard, while Bjoern gives rookie Jan Erik a lesson in becoming a proper rescuer. (S9, ep 5) 7+.

Ruins across Europe tell the story of a devastating and revolutionary military tactic that nearly allowed Hitler to create his Thousand Year Reich. 7+.

31 August 1986. A calm Labor Day is shattered by tragedy. More than 80 lives are lost when two planes fall from the sky. How and why did they collide.

Dark Waters: Will, afraid of spiders, journeys into the Ecuadorian Amazon to abseil into the womb of the Earth and harvest tarantula venom. (S1, ep 3) 7+.

US Paratroopers dropped into France before the D-Day landings and battled Nazi defenders for a key bridge behind enemy lines.

Former slave labourers at the Sobibor death camp in German-occupied Poland discuss their lives as prisoners and share the story of their courageous escape on 14 October 1943. 7+.

Investigators uncover the tragic misunderstanding of the Kegworth air disaster - when British Midland Flight 92 crashed in 1989, killing 47 people. (S13, ep 1) 7+.