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For years, people have reported strange sky-sightings and encounters with entities despite the stigma of sharing such experiences. Part 1.

Reports from people who say they've been abducted are explored. A Harvard psychiatrist who takes them seriously comes under attack. Part 2.

The stigma surrounding UFOs extends beyond the US government. Pilots fear for their jobs after encountering mysterious phenomena in flight. 7+.

From Angkor Wat to Ireland's Newgrange, ancient sites align with the cosmos, revealing sacred design and celestial wonder. (S1, ep 2) 7+.

one of the most versatile materials in the construction world. It's both practical and beautiful, but when it fails, it's not all it's cracked up to be.

Urban construction relies on two types of cranes to hoist the next high-rise - but when they fail, they make one big mess. Plus, discover the bad side of escalators. (S1, ep 4) 7+.

It's a vibrant New Orleans summer when Hurricane Katrina looms. Residents recall how they navigated the impending disaster. (1 of 5) 7+.

After Hurricane Katrina passed, citizens soon discovered the levees breached, quickly flooding New Orleans like a bathtub. (2 of.

Rescues continue as thousands remain trapped. In the Superdome, survival stories emerge while media shifts focus to looting over aid efforts. (3 of.

Post-Katrina, Gen. Honoré leads rescues as evacuations fail. Violence grows, militias emerge and thousands remain stranded across the city. (4 of.

Residents navigate the uncertainty of how and when they might restore their lives. In the wake of the chaos, a plan for the city unfolds. (5 of.

Marvel at Poland's salt mine, explore a Cold War bunker, uncover an ancient Egyptian site and probe China's mysterious Longyou Caves. (S1, ep 2) 7+.

After the Twin Towers fell, doubts grew - but bold new safety breakthroughs sparked a surge, as taller, stronger skyscrapers rose worldwide.

A former Special Forces soldier turned CIA officer faces a brutal call when an ally vanishes - launch a rescue or risk walking into a deadly ambush... (8 of.

Experts investigate the mysterious malfunction that caused Qantas Airways Flight 72 to take a sudden nosedive over the Indian Ocean. (S17, ep 7) 7+.

On 2 August 2005, Air France Flight 358 skidded off the runway in Toronto. An engine caught fire, trapping 300 passengers on the plane. How did they escape? 7+.

Amsterdam Central never stops. 200,000 passengers pass daily as 900 staff keep trains running safely during a huge, high-pressure rebuild. (S1, ep 2) 7+.

Tim and Fuzz restore a Citroen SM - widely considered one of the greatest French cars ever - after it suffered catastrophic engine failure on its first outing. (6 of 10) 7+.

Tim and Fuzz head to Norfolk to take on a 1962 TVR Grantura that has been off the road for nearly 50 years. (7 of 10) 7+.

A fascinating look inside the 1,000,000-square-foot American crisp factory. During the build-up to the 4 July celebrations, Frito Lay uses a million pounds of potatoes a day. 7+.

Explore Porsche's hi-tech plant, where the Panamera is made on one assembly line, there are 14 deliveries a day and not a single warehouse or forklift truck. 7+.

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.

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

From delusional hijackers to suicidal pilots, three flights fall victim to astonishing acts of sabotage. (S5, ep 10) 7+.

Meet the world's largest 3D printer, a huge tunnel-boring machine and engineers working on a machine that can create single-piece metal parts. (S1, ep 6) 7+.

Tim and Fuzz take on a MINI Mayfair bought by Donna with her late father's inheritance. Dreaming of a Cooper, she ended up with a rust-ridden wreck. (S14, ep 5) 7+.

A look at the war strategy and catalogue of errors that led to the British sinking of the Bismarck, a wreck that killed more than 2,000 German soldiers in 1941. 7+.

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+.

Hitler orders the largest battleships ever seen. But how long will they last? He also demands fortified bunkers in a bid to protect his U-boats from the Allies. 7+.

After the Twin Towers fell, doubts grew - but bold new safety breakthroughs sparked a surge, as taller, stronger skyscrapers rose worldwide.

Antoni Porowski explores Mexico City's flavours, culture and colour, from fine dining to lucha libre, uncovering what makes this city unmissable.

Drowned shipwrecks and lost battlefields reveal secrets of America's most famous siege and tell how Texas, against all odds, secured its independence. 7+.

US paratroopers are dropped behind enemy lines before the D-Day landings to prevent German reinforcements from reaching the beaches. (S2, ep 1) 7+.

Experts discover a missing pilot's unwitting part in a fatal crash as they investigate the collision between United Express 5925 and a private plane. 7+.

Amsterdam erupts as 800 ships arrive and crowds surge. With 150,000 extra passengers, staff battle to control the chaos, tackle incidents and keep the station safe.

Authorities suspect a terror attack when a plane explodes after taking off from JFK. The FBI joins investigators in their search for answers. (S16, ep 4) 7+.

At JFK Airport, Homeland Security and CBP officers intercept stolen antiquities and fake visas, working on the front line to stop smuggling and fraud. (S4, ep 3) 7+.

Slamming into a mountain, Japan Airlines 123 becomes the deadliest single aircraft accident in history and threatens to ground 747s worldwide. (S22, ep 3) 7+.

At Toronto Pearson International Airport, the sub-zero temperatures push the de-icing station to its limits, as snow and freezing ice delays take offs. (1 of 10) 7+.

A former Special Forces soldier turned CIA officer faces a brutal call when an ally vanishes - launch a rescue or risk walking into a deadly ambush... (8 of.

After three years of unthinkable tragedy, the loved ones of a widowed father of two have rallied together to cheer him up, and Car S.O.S is here to help! 7+.

San Diego HSI and Border Patrol agents stop a vehicle from Mexico loaded with a medley of meth, fentanyl, cocaine and heroin worth $1.6 million. 7+.

Feast your eyes on a waterfall of chocolate, meet the saucy squad behind cannelloni and find out what it takes to prepare butternut squash. (S5, ep 5) 7+.

From tree to bottle, follow the story of maple syrup and find out about the 'tower of power' behind Almond Roca butter toffee popcorn. (S5, ep 6) 7+.

Pelt and Digit run into trouble when they go house hunting. Meanwhile, Champ faces off against a familiar alpha male - his father. (S1, ep 10) 7+.

Charlotte and Petal go shopping for new territory. Gnash goes head-to-head with Carl and Champ in an eating contest as they get ready for hibernation. (S1, ep 11) 7+.

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.

Explore aviation disasters caused by broken communication and see how hard lessons reshaped air traffic control forever. (S1, ep 11) 7+.

Explore how brutal weather turns routine flights deadly and how hard lessons from aviation disasters reshaped safety in the skies. (S1, ep 12) 7+.

The need for speed has been met with a new superclass of machines. It is expected that they will have to go farther, higher and faster. (1 of 6) 7+.

Tim and Fuzz take on Raymond's 1990 Nissan Pulsar GTI-R, the dream build he couldn't finish. From its corroded shell to scattered parts, this is a risky build. (S14, ep 6) 7+.

A look at the devastating tsunami that swept Northern Italy in 1963. Largely down to human error, the death of 2,000 people could have been avoided. But how? 7+.

Clues point to a mechanical problem when a Continental Airlines flight crashes. But then, investigators find the true culprit in the Rocky Mountains.

Fight for Survival: In this special episode, submarine crews fought for survival as they engaged in some of the most intense naval battles of World War II. (S3, ep 1) 7+.

Heroes of the Deep: In this special episode, submarine crews band together to overcome extraordinary obstacles. (S3, ep 2) 7+.

From Angkor Wat to Ireland's Newgrange, ancient sites align with the cosmos, revealing sacred design and celestial wonder. (S1, ep 2) 7+.

New discoveries made at a lost city and a tale of human sacrifice offer a new insight into the rise and fall of the ancient Maya. (S5, ep 5) 7+.

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

Experts are forced to confront a controversial issue as they dig into the fate of Asiana Airlines Flight 214 which crashed into a seawall in 2013. 7+.

Lawyer-turned-archaeologist Kathleen Martinez has spent 20 years searching for Cleopatra's lost tomb. Her excavations now lead in an unexpected new direction.

Experts face a real puzzle after archaeologists discover a tomb containing a princess, a noblewoman and 30 mysterious mummies. 7+.

In the shadow of the pyramids, an elite team of archaeologists embark on an extraordinary excavation. Could this secret site reveal new evidence? 7+.

Corporate Airlines 5966 crashes mysteriously in Missouri, but investigators uncover a conversation in the cockpit that set the tone for disaster. 7+.

Fire crews race to a plane with faulty brakes, cargo vanishes and passengers refuse to check bags. (2 of 10) 7+.

At Italy's busiest airport, police find cocaine sewn into a shirt and hidden in a shoe. Also, a family travelling with fake passports face arrest. (S8, ep 2) 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? 7+.

Discover the art of making fruit leather and cheese curds and meet the fun-loving crew behind a Canadian guacamole. (S5, ep 7) 7+.

Visit the factory behind exotic truffles and take a peak into the assembly line where 250,000 gyoza dumplings are made every day. (S5, ep 8) 7+.

As winter hits, a gang of deadly predators puts every dog on high alert. Pelt says goodbye to the flatlands in order to find his place in the world. (S1, ep 12) 7+.

Explore the journeys of migrating animals across the world. In spring, animals from all over the South Atlantic descend on the Falklands. (1 of 10) 7+.

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.

On 2 August 2005, Air France Flight 358 skidded off the runway in Toronto. An engine caught fire, trapping 300 passengers on the plane. How did they escape? 7+.

In 1982, a British Airways jet plunged toward the ocean after flying through volcanic ash from an eruption. Could the crew restart the engines? 7+.

No matter the danger, these mechanical superheroes answer the call when we need them most. (2 of 6) 7+.

Marvel at Poland's salt mine, explore a Cold War bunker, uncover an ancient Egyptian site and probe China's mysterious Longyou Caves. (S1, ep 2) 7+.

A tense look at the worst nuclear incident since Chernobyl. As a tsunami hit the Fukushima power plant in 2011, explosions tore the site apart, releasing lethal radiation. 7+.

A series of discoveries spark calls to transform Russia's entire aviation system when an Aeroflot Nord flight crashed onto the Trans-Siberian railway.

In late 1944, Hitler stuns the Allies with rockets, jet fighters and a surprise assault on Belgium, catching US troops off guard. (3 of.

Colourised footage and eyewitness stories reveal the true cost of World War II's liberation across Western Europe, for both civilians and soldiers alike. (4 of.

The world's most controversial pirate, Sir Francis Drake was renowned for his journeys as a slave trader and his vicious attacks on Spanish colonial towns. (S1, ep 1) 7+.

With real-time access to a US border security team, discover the extraordinary story of how Mexican cartels have smuggled cocaine into the US over the last 40 years. (S5, ep 6) 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+.

Investigators uncover a problem threatening every 747 in the sky as they delve into the worst aviation disaster ever to occur in the Netherlands. 7+.

Uncover the secrets behind monuments that reveal ancient ambition, engineering brilliance and stories of power and war. (S1, ep 3) 7+.

Archaeologists dig beneath the Colosseum to uncover the Roman games, gladiator secrets and remains of ancient beasts. (S1, ep 2) 7+.

Witch hunts grip Europe as fear spreads. In 1645, ruthless witchfinders terrorise England, while in Sweden, mass hysteria erupts. (S1, ep 2) 18+.

Careening into a mountaintop just minutes from the runway, an American charter flight becomes the worst aviation disaster in Portuguese history. (S22, ep 2) 7+.

A flight carrying 80 passengers and crew crashes on landing. As the airport goes into an immediate stop, the teams on the ground are pushed to their limit. (3 of 10) 7+.

Amsterdam erupts as 800 ships arrive and crowds surge. With 150,000 extra passengers, staff battle to control the chaos, tackle incidents and keep the station safe.

The boys head to Somerset to help ex-soldier Ben, who sustained life altering injuries in the line of duty. Can they restore his Jeep Grand Cherokee? 7+.

CBP Air and Marine agents hunt for drug runners off the coast and in the jungles of Puerto Rico. 7+.

Meet the sturgeon that can produce a bowl of caviar worth $12,000 and a family business that rolls out nine million risotto balls a year. (S5, ep 9) 7+.

Get the scoop on these two-toned frozen fruit bars from Florida and discover the super-food used to make kale chips. (S5, ep 10) 7+.

A look at the monarch butterfly's incredible multi-generation migration from Mexico to Canada - a round trip that none of them live to complete. (2 of 10) 7+.

It's baby boom time on Africa's vast Serengeti Plain. One million wildebeest halt their migration to give birth. And there are predators everywhere. (S1, ep 3) 7+.

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.

When a fire erupted onboard Air Canada Flight 797, the pilot made an emergency landing. Although flames engulfing the plane killed half the passengers. 7+.

On 6 August 1997, Korean Air Flight 801 crashed before landing, killing over 200 people, caused by a series of errors by the pilot and airline. (S4, ep 4) 7+.

Titan transports move the biggest and most earth shaking loads by land, sea and sky: moving the critical goods that make our world run. (3 of 6) 7+.

Root for a comeback as Tim and Fuzz race to save a rusted Alfa Romeo and restore a dream stolen by heartbreak and time. (S14, ep 7) 7+.

An investigation into the decisions and failings that culminated in the world's biggest accidental marine oil spill in 2010, leaving 11 crewmen dead. 7+.

Experts investigate the deadly gamble that caused LaMia Flight 2933 to crash. 71 people were killed, including Brazil's Chapecoense football team. (S18, ep 9) 7+.

From the landings in Saipan to D-Day in Normandy, this dramatic unseen footage reveals World War II's most significant moments.

Previously unseen footage reveals some of the most significant moments of WWII as fighting reached a bloody climax and the US prepared to drop the atomic bomb.

The Pirate Queen of Ireland - Grace O'Malley - defied gender conventions to become the most feared and respected leader of both the land and the sea. (S1, ep 2) 7+.

Journey to a wild land of untapped riches, once known as Russian America, on this hunt for a legendary ghost ship. 7+.

A fearsome new Nazi battleship, sets sail for the Atlantic with a mission to destroy Allied supply ships. (S3, 2 of 6) 7+.

Experts investigate the tragic fate of UPS Flight 6, a cargo jet which crashed shortly after take-off from Dubai in 2010 when a fire broke out onboard. 7+.

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.

After the Twin Towers fell, doubts grew - but bold new safety breakthroughs sparked a surge, as taller, stronger skyscrapers rose worldwide.

When a turboprop crashes in Papua New Guinea, investigators uncover a deadly flaw in an aircraft used all around the world. (S22, ep 4) 7+.