Nat Geo HD Secrets of New York City: As the water drains away, a secret emerges beneath Manhattan's skyline, along with an astonishing feat of engineering and a casualty of World War I. RATING: AA 2026-07-21 Hitler's Rise To Power: 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. 2026-07-21 Deadly Discussions: Experts reveal how a staggering blunder caused one of Argentina's most devastating air disasters as they investigate the fate of LAPA Flight 3142. (S16, ep 9) 7+ 2026-07-21 Critical Flaw: Experts use 3D graphics and forensic analysis to uncover the causes of the 737 Max crash, Kielland rig disaster and Notre-Dame fire. (S2, ep 2) 7+ 2026-07-21 Fatal Climb: An accident or an act of murder? Investigators call in the FBI when Romania suffers the deadliest air disaster in its history. (S18, ep 6) 7+ 2026-07-21 UA232: When United Airlines Flight 232 suffered a catastrophic failure in 1989, the crew onboard faced an impossible task - land the plane despite losing all control. (S1, ep 5) 7+ 2026-07-21 Deadly Climb: In 1985, the deadliest year in civilian aviation, a DC-9 commuter plane crashes seconds after take-off from Milwaukee. (S24, 6 of 10) 7+ 2026-07-21 On Patrol 24/7: A routine check has shocking consequences, headquarters investigate a suspicious speedboat and coastguard teams handle a case of alleged domestic violence. 7+ 2026-07-21 Guns Gone Wild: Homeland Security Investigations in Miami conduct an operation leading to the seizure of illegal weapons bound for the Caribbean. (S9, ep 5) 7+ 2026-07-21 Decoy, Diversions and Drug Busts: In New York, a joint operation led to the discovery of a white powdery substance in a bag inspected coming off an international flight. (S1, ep 8) 7+ 2026-07-21 Rage against the River: Hazen must use the daredevil skills of Lao Loum fishermen to catch fish in white-water rapids. To get here, he must tightrope walk across raging rapids. (8 of 8) 7+ 2026-07-21 I Love Cannons: Weapons expert Sean Rich and his team of military aficionados travel America in search of rare and priceless antique weapons and militaria. 7+ 2026-07-21 Like Momma Makes: Discover how state-of-the-art machinery makes 50,000 perfect frozen pizzas a day. Plus, what's the buttery secret to making mini Quiche Florentine? (S1, ep 17) 7+ 2026-07-21 Flour Power: Discover how 15 metric tonnes of goat cheese gets made each week. And why a team of experts have to get hands-on to make 8,000 strawberry shortcakes. (S1. ep 18) 7+ 2026-07-21 Enema of the State: Crystal the bearded dragon requires emergency surgery, and Leo the tortoise is brought in after being run over by a car. (S1, ep 3) 7+ 2026-07-21 A Prairie Good Dog: Dr K must work fast when she finds a mysterious bump on Lil Bit the dog's face and Croquetta the pig gets a piece of fruit stuck in her throat. (S1, ep 4) 2026-07-21 Teleshopping. 2026-07-21 Teleshopping. 2026-07-21 Teleshopping. 2026-07-21 Teleshopping. 2026-07-21 Your one-stop-shop for all things cruise; bringing you the hottest destinations, ground-breaking ships and the latest deals to ensure your next cruise is your greatest one! 2026-07-21 Head On Collision: 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+ 2026-07-21 Operation Babylift: 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+ 2026-07-21 Avalanche: After a huge blizzard, conductor Jim and engineer Jordy are hauling $50 million worth of freight. Plus, technician Derek makes a startling discovery. (S1, ep 1) 7+ 2026-07-21 VW Golf GTI Mk.2: Tim and Fuzz are out to help Darren, who was left disabled after a tragic road accident in which he saved his grandson, by fixing up his iconic 1989 Golf. (8 of 10) 7+ 2026-07-21 Old Photos and a New Student: Airport workers reunite travellers with their missing items, including a collection of old photographs with their owners. (S1, ep 7) 7+ 2026-07-21 Terror Over Michigan: After a Boeing 727's near-fatal nosedive over Michigan, investigators risk their own lives to determine why the plane fell out of the sky. (S21, ep 6) 7+ 2026-07-21 The Nazi Empire: As they march through Western Europe, Nazi architects design Nazi cities of the future. But behind epic designs lie violent ideologies of oppression. (S1, ep 8) 7+ 2026-07-21 Stefan Hördler, a world-leading expert on Nazi history, investigates a previously unpublished album containing hundreds of Nazi officer faces. 2026-07-21 Origins: Investigations across Italy explore the roots of this symbol of Roman power and the gladiator games that were held there. (S1, ep 1) 7+ 2026-07-21 Thai Cave Rescue: The water's drained from Tham Luang to reveal more about the global rescue mission that saved 12 trapped boys and their football coach from the flooded cave. 7+ 2026-07-22 Collapse Of France: Footage reveals hidden stories behind the collapse of France, from German soldiers celebrating on the Dunkirk beaches, to French civilians fleeing the Nazi advance. 2026-07-22 The Lost Plane: Experts are baffled when the wreck of Thai Airways Flight 311 is found amid mountain peaks, miles away from its flight path. How did it end up there? (S16, ep 7) 7+ 2026-07-22 Tug O' War: At Türkiye's Sanmar Shipyards, engineers test powerful electric tugboats built to guide the world's largest ships safely into port. (S1, ep 4) 7+ 2026-07-22 Hidden Flaws: Investigate shocking structural failures as experts uncover why skyscrapers, landmarks and cranes collapse when design and renovation go wrong. (S3, ep 4) 7+ 2026-07-22 Critical Flaw: Experts use 3D graphics and forensic analysis to uncover the causes of the 737 Max crash, Kielland rig disaster and Notre-Dame fire. (S2, ep 2) 7+ 2026-07-22 Pacific Ditching: Moments after taking off from Honolulu, the pilots of TransAir Flight 810 battle to keep their cargo plane airborne. (S24, ep 7 of 10) 7+ 2026-07-22