Nat Geo HD

Chad joins the salvage team tasked with tearing apart the North Sea's 24,200-tonne Brent Delta oil platform. (S1, ep 4) 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+.

Looks at the Uberlingen plane crash that killed 45 children. A man who lost his family later murdered the air traffic controller who was on duty. 7+.

In 1945, an American submarine Commander receives an order to hunt Japanese submarines tasked with secretly evacuating VIPs from the Philippines. (3 of 6) 7+.

Looks at the Nazi occupation and defence of Norway - a frontline from which Hitler could attack the Soviet Union and build an atomic bomb. (S4, ep 4) 7+.

Examine the startling events of Helios Flight 522, which crashed into the side of a mountain when all on board inexplicably slipped into unconsciousness. 7+.

After taking off from Taiwan, a China Airlines 747 suddenly disappeared from radar and crash-landed, killing 225 people. Researchers try to find out why. 7+.

WWII was a war in the skies. Despite the Treaty of Versailles, Germany fostered air clubs to gain aerial supremacy. (S1, ep 2) 7+.

Spiculus becomes a superstar in Rome's brutal arenas. Rewarded with wealth and privilege, he fights for glory.

When a mountain blizzard causes a double accident, Bjoern is forced to call his rivals for help. (S7, ep 5) 7+.

A ship breaks a Baltimore bridge, a Dutch stadium loses its top, a Manhattan crane catches fire, a crooked English pub and a "poonami" in China. (S2, ep 1) 7+.

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 Investigators find one of the causes to be out of date passenger weight calculations. 7+.

Flying from the Kathmandu to Pokhara, Yeti Airlines Flight 691 stalls and crashes into a gorge where investigators find a scene of annihilation. (S25, ep 8) 7+.

A C-130 firebomber crashes while battling an epic Australian wildfire. And ATSB investigators must determine the cause within an active fire zone. (S24, 3 of 10) 7+.

The waters protected by the Dutch Caribbean Coast Guard are frequently trafficked by drug smugglers from surrounding countries. (S2, ep 2) 7+.

After clearing the Manx2 Flight 7100 for landing, controllers at Ireland's Cork Airport are shocked when it crashes into the runway. (S13, ep 9) 7+.

Tim and Fuzz take on carpenter Mike's 1980 Ford Escort RS2000 in the aftermath of his son's road accident. (S10, ep 4) 7+.

Customs and Border Protection in Philadelphia discover ketamine hidden in clothing and human remains manifested as Halloween decorations. 7+.

Mariana embarks on a 3,000-mile journey from Africa to the Middle East to uncover how black market oil is fuelling terrorist groups around the globe. (S1, ep 6) 18+.

Fire trucks carry firefighters into battle every day. Pierce Fire Trucks build 18,000 of them every year. This is the story of how they are made. (S1, ep 5) 7+.

OneWeb Satellites in Florida reveal how they're making the world's first mass-produced satellites, providing internet to almost every part of the globe. (S1, ep 12) 7+.

Discover the secrets behind a legendary hot sauce, a century-old cereal, barista-worthy chocolate bars, and hard-boiled eggs by the thousands. (S4, ep 26) 7+.

Get the scoop on red liquorice candy, spicy Sriracha mayonnaise, flaky Turkish bourekas, and an irresistible dark chocolate cookie. (S5, ep 1) 7+.

Staff at the Columbus Zoo work around the clock to save a mandrill named Tatu who's in a life-or-death struggle. (S1, ep 9) 7+.

The entire zoo is on baby watch as Phoebe the elephant goes into labor. Meanwhile, a family of flying foxes get their annual exam. (S1, ep 11) 7+.

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Chad joins the team charged with stripping down and rebuilding the biggest cargo plane ever. (S1, ep 5) 7+.

After an extensive retrofit, three Airborne Express pilots board a modified DC-8 cargo plane for a routine test flight that ends in disaster. (S24, ep 9 of 10) 7+.

The Roman Empire once controlled 25% of the world's population. Now, archaeologists are excavating this vast frontier. (S2, ep 5) 7+.

When Hitler sends U-Boats to protect his troops, a German sub rushes towards the fjords leading to Narvik - the scene of two major naval battles. (4 of 6) 7+.

A look at how Hitler's vast network of railways became the lifeblood of the Nazi empire, spreading Hitler's ambition and control across Europe. (S4, ep 1) 7+.

Documentary looking at the tragic circumstances of the bombing of Pan Am Flight 103, which was the largest terrorist attack on Americans before the events of 9/11. 7+.

In September 1989, Partnair Flight 394 crashed into the sea killing all 55 people on board. Follow the review of the biggest air disaster in Norwegian history. 7+.

Hitler was famously against using chemical and biological weapons but chemistry and biological science still played a role in the Nazi's quest for power.

The Battle for the Black Swan: Archaeologists and treasure hunters battle over half a billion dollars worth of gold. Who will win the fight for the Black Swan? (S4, ep 7) 7+.

Jo Roger's rookies are put to the test with a triple rescue, but the mission gets off to a rocky start when their most powerful truck gets stuck. (S7, ep 6) 7+.

From bridges to highways, skyscrapers to supermarkets, these are just some of the structures showcased in Construction Fails. (S2, ep 2) 7+.

A DC-9 is caught in a storm so severe that hailstones crack the cockpit windshield, causing the plane to plummet to the ground. Miraculously 20 people survive. 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+.

After being invaded by the Germans in the west and the Soviets in the east in 1939, the Poles were liberated during the Battle of Barbarossa.

Flying from the Kathmandu to Pokhara, Yeti Airlines Flight 691 stalls and crashes into a gorge where investigators find a scene of annihilation. (S25, ep 8) 7+.

Tim and Fuzz head to Huddersfield to rescue a 1992 VW Corrado, a German coupe that was once one of the fastest small family cars on the road. (S10, ep 2) 7+.

HSI and CBP uncover nearly $500K in meth and fentanyl, bundles of cash, bricks of cocaine and thousands of dollars worth of counterfeit goods. (S6, ep 1) 7+.

The team hit the jackpot in an abandoned church, finding a Tiffany-style stained glass window and the remains of a basement bowling alley. (S1, ep 12) 7+.

John Deere opens the doors to their Iowa mega-factory to reveal how they make the world's most powerful tractors, big machines designed to feed the world. (S1, ep 9) 7+.

New Balance reveal how high-tech machinery, hand-crafting skills and global logistics combine to make their best-selling sneaker across the world. (S1, ep 3) 7+.

A look at how millions of cherry chews are made, with macaroni, cranberry cheesecake and more. (S5, ep 2) 7+.

Get the inside scoop on honey, sprouted wheat bread, a checkerboard cookie, and irresistible chocolate-covered cherries. (S5, ep 3) 7+.

The Columbus Zoo's new resident, a polar bear named Lee, arrives in Ohio and must get through quarantine. (S1, ep 12) 7+.

Keepers help Katie the koala get better by ingesting her partner's feces. Over at The Wilds, the team welcome several newborn baby takins. (S2, ep 1) 7+.

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Chad joins a critical mission for the USS Carl Vinson as he explores the inner workings of this incredible floating city. (S1, ep 6) 7+.

Air Tahoma Flight 185, a late-night cargo flight from Memphis, is on final approach to Cincinnati. (S24, ep 10 of 10) 7+.

Count down the moments leading up to the 'unsinkable' ship's demise on 14 April 1912. An iceberg, too few lifeboats and freezing waters combined in an oceanic tragedy. 7+.

After their first war patrol ends in conflict, a new submarine Commander must build trust as they travel to target enemies in dangerous Japanese waters. (5 of 6) 7+.

A look at how Hitler and Holocaust mastermind Heinrich Himmler used a vast rail network to transport Jews to their death. (S4, ep 2) 7+.

When Saudi Airways and Kazakhstan Airlines jets hit each other at 14,000 feet, both planes were sent spiralling to the ground. But what caused their impact? 7+.

A tragedy from the Vietnam War, when more than 250 children, who were being airlifted to safety on a US Air Force C5A Galaxy, died in a mysterious explosion. 7+.

Exploring a history of firsts, from the Fritz X to the world's first precision-guided weapon deployed during combat.

Draining Lake Michigan uncovers Chicago's secret history and exposes a catastrophe that killed 300 people and reveals an engineering marvel. 7+.

Thord and Andrzej fall prey to the Norwegian winter and, in a shocking twist of events, they end up in need of rescue! (S7, ep 7) 7+.

An overpass on Philadelphia's busy Interstate- 95 highway sets ablaze after a tanker truck rollover. (S2, ep 3) 7+.

Flying from the Kathmandu to Pokhara, Yeti Airlines Flight 691 stalls and crashes into a gorge where investigators find a scene of annihilation. (S25, ep 8) 7+.

Linguist Dr Mary Walworth and local marine ecologist John Aini join Will as he travels to the South Pacific to an island threatened by rising seas. (S1, ep 4) 7+.

Hear from insiders who secretly worked on jaw-dropping aircraft and weapons systems at the highly classified military base. 7+.

Spiculus becomes a superstar in Rome's brutal arenas. Rewarded with wealth and privilege, he fights for glory.

Mid-air hijack? Mechanical breakdown? Pilot error? Follow aviation experts as they dissect this mysterious case. (S13, ep 10) 7+.