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Working thousands of feet above the California desert, engineers and crews perform perilous high-wire acts to keep a hi-tech tramway system operating safely for the hundreds of daily tourists it transports.

When sea levels rise, storm surge barriers work overtime to fight floods; it takes a team of experts to maintain these engineering marvels to prevent catastrophe and keep millions of people safe.

When the world's oldest roller coaster breaks at the worst possible moment, skilled engineers and technicians race against the clock to investigate what went wrong and how to fix it before it's opened to the public.

Lighting technicians battle extreme desert conditions to keep the lights bright in Las Vegas; at extreme heights, they perform risky neon bulb replacements.

When sea levels rise, storm surge barriers work overtime to fight floods; it takes a team of experts to maintain these engineering marvels to prevent catastrophe and keep millions of people safe.

When the world's oldest roller coaster breaks at the worst possible moment, skilled engineers and technicians race against the clock to investigate what went wrong and how to fix it before it's opened to the public.

Lighting technicians battle extreme desert conditions to keep the lights bright in Las Vegas; at extreme heights, they perform risky neon bulb replacements.

Working thousands of feet above the California desert, engineers and crews perform perilous high-wire acts to keep a hi-tech tramway system operating safely for the hundreds of daily tourists it transports.

The US military's most advanced hovercraft represents the next generation of amphibious transport vehicles, and using the latest in cutting-edge tech, it's designed to carry the heaviest cargo into locations that were previously impossible to reach.

The Queensferry Crossing in Scotland marks a new age of superstructure construction.

An unearthly presence at a nuclear launch site in Cyprus visits a UN peacekeeper and helps him fight off a deadly enemy.

Mysterious tomb carvings provide dark evidence that ancient Egyptians practiced cannibalism but there is no explanation as to why; experts use modern-day tech to reveal more of Egypt's darkest secrets.

The Scorpion King is a fabled character from Egyptian history, but new evidence suggests that he might have actually existed; new discoveries might answer the ancient mystery, and experts use modern-day tech to reveal more of Egypt's darkest secrets.

The incredible secrets of the moon are revealed; the moon might be responsible for life on Earth.

Discoveries of new planets have revealed countless worlds much stranger than Earth; some of these strange worlds don't have stars and others are made out of diamonds.

Exploring the many different interpretations of the legendary relic, the possibility of its actual existence, and where it might be located.

Investigating whether the mysterious group known as the Illuminati is an actual secret society operating in the shadows or simply the invention of conspiracy theorists.

Investigating the mysterious figures in Greek society known as oracles, who reputedly spoke the word of the gods.

Investigating the claim that the Nazis created a flying saucer at a secluded research facility, and that the United States and Russia obtained the secret technology after World War II.

Jeremy Wade follows investigators as they dive the wreck of the ferry MS Estonia; the case of America's notorious skyjacker DB Cooper takes an intriguing underwater twist.

Jeremy Wade examines new evidence that could finally reveal what happened to aviator Amelia Earhart; Jeremy investigates a strange anchor found in the Mediterranean Sea.

Jeremy Wade investigates the infamous shipwreck of the Titanic; locals are baffled when a bag containing 54 severed human hands is found on the banks of a Siberian river.

Traces of a Russian hole to hell in the Arctic, a military base in America's wild west, and a strange looming tower are mysterious deserted engineering projects, and new discoveries reveal how they were built and why they were abandoned.

A secret Russian military base in the Gobi Desert; a strange complex in an American wasteland; a relic high atop a mountain.

A strange Cuban prison, an eerie escape route built for Armageddon, and an underwater marvel that changed history are mysterious deserted engineering projects, and new discoveries reveal how they were built and why they were abandoned.

A strange alien shrine on a mountain peak; a bridge built in the Alaskan wilderness; an American castle with a dangerous secret.

An American ghost town in the Amazon jungle, a secret Nazi base, and a deadly concrete fortress 866 miles long are mysterious deserted engineering projects, and new discoveries reveal how they were built and why they were abandoned.

A terrifying sea fortress, a highway in the Amazon that suddenly vanishes, and a mysterious structure in the shadow of the Statue of Liberty are deserted engineering projects; discoveries reveal how they were built and why they were abandoned.

A strange alien shrine on a mountain peak; a bridge built in the Alaskan wilderness; an American castle with a dangerous secret.

An American ghost town in the Amazon jungle, a secret Nazi base, and a deadly concrete fortress 866 miles long are mysterious deserted engineering projects, and new discoveries reveal how they were built and why they were abandoned.

A terrifying sea fortress, a highway in the Amazon that suddenly vanishes, and a mysterious structure in the shadow of the Statue of Liberty are deserted engineering projects; discoveries reveal how they were built and why they were abandoned.

A strange Cuban prison, an eerie escape route built for Armageddon, and an underwater marvel that changed history are mysterious deserted engineering projects, and new discoveries reveal how they were built and why they were abandoned.

Jeremy Wade examines new evidence that could finally reveal what happened to aviator Amelia Earhart; Jeremy investigates a strange anchor found in the Mediterranean Sea.

Jeremy Wade investigates the infamous shipwreck of the Titanic; locals are baffled when a bag containing 54 severed human hands is found on the banks of a Siberian river.

An intelligence analyst on a secret mission makes an unearthly discovery.

Nefertiti is one of ancient Egypt's most iconic pharaohs, and the latest tech helps experts in search of her mummy; what they discover might reveal the shocking truth about how she died, offering more clues to Egypt's darkest secrets.

Cataclysmic changes in ancient Egypt might have been caused by an extraordinary set of international phenomena, and the latest tech helps identify the supernatural culprit; what experts discover reveals a truth stranger than fiction.

For years, scientists suspected that the oceans came from molecules delivered to Earth from distant stars by asteroids, but a new discovery suggests that their true origins may be more exotic.

Scientists have discovered a mysterious ninth planet ten times the size of Earth on the very edge of the solar system; this strange world could have moons with extraterrestrial life.

Three inmates are said to have escaped from Alcatraz prison, but even today, it's never been proven; new evidence might finally crack this notorious cold case, as experts use forensic science and cutting-edge technology to investigate fresh leads.

Aviator Amelia Earhart's disappearance is one of the greatest unsolved mysteries, but forensic science might finally crack the case, as experts examine human remains that could be proof positive of her whereabouts.

The Shroud of Turin is alleged to be the burial cloth of Jesus Christ; forensic analysis is used to determine the truth.

A nuclear submarine goes missing while spying on Soviet maneuvers, and its wreckage is found on the ocean floor.

Beneath Yellowstone National Park is one of the world's largest active volcanoes, and it's poised to erupt at any moment; experts use seismic technology and visual imaging to reveal its catastrophic threat.

Using cutting-edge forensic analyses, some of the world's leading investigative experts uncover the stunning truth behind compelling mysteries from ancient times to the recent past.

A fleet of sunken ships that point to ghosts, cannibals, and bloodshed in early America; strange arctic holes that NASA can't explain; near Area 51, mysterious alien structures straight out of Star Wars.

New discoveries from space give experts new clues in the hunt for Jack the Ripper; a strange object crash-lands in Antarctica, experts speculate it could be an alien visitor.

Hundreds of shipwrecks in the middle of a desert in Africa; a ghost town where hundreds of its inhabitants have mysteriously died; something strange in North Korea; cutting-edge tech helps experts answer these sinister mysteries from space.

A site that could be the Garden of Eden hides a deadly secret; when a gateway to hell suddenly opens, experts investigate where it leads; a mysterious shipwreck could be an infamous Soviet KGB pirate ship.

The world's most dangerous threats reside in top-secret locations all over the planet; experts use cutting-edge technology to reveal the truth behind sinister mysteries from space.

Evidence of a mysterious 5,000-year-old structure suddenly appears in Ireland; a top-secret machine that can see back in time; a satanic pentagram in the snow that points to witchcraft in the New World.

The world's most dangerous threats reside in top-secret locations all over the planet; experts use cutting-edge technology to reveal the truth behind sinister mysteries from space.

Evidence of a mysterious 5,000-year-old structure suddenly appears in Ireland; a top-secret machine that can see back in time; a satanic pentagram in the snow that points to witchcraft in the New World.

A site that could be the Garden of Eden hides a deadly secret; when a gateway to hell suddenly opens, experts investigate where it leads; a mysterious shipwreck could be an infamous Soviet KGB pirate ship.

Josh Gates explores how club members' swashbuckling exploits inspired Hollywood; a bullwhip-cracking archaeologist may be the real-life Indiana Jones; a Nazi mountaineer's life-changing "Seven Years in Tibet" became a Brad Pitt star turn.

A fleet of sunken ships that point to ghosts, cannibals, and bloodshed in early America; strange arctic holes that NASA can't explain; near Area 51, mysterious alien structures straight out of Star Wars.

Jamie and Adam try to tenderize steak with explosives and test to see if a motorist uses more fuel when driving under stress.

The team tests some popular ninja myths.

The team tests four myths.

Special access inside one of the world's fastest catamarans reveals the secrets of a high-speed, hi-tech monster ferry that uses the power of 50 Formula One cars to conquer some of the roughest seas on earth.

George sends Greg to the world of production to explore the relationship between technology, sustainability and the precious metals needed to shape the future.

Body casting; downdraft stoves; compression garments; electric motorcycles.

Special access inside one of the world's biggest cruise ships reveals the secrets of a high-class, hi-tech floating city that can accommodate thousands of guests and weather the roughest seas.

The Airbus Beluga is an extraordinary mega-freight plane that can carry 47 tons of cargo on a single trip, and behind-the-scenes access into this hi-tech behemoth reveals how its crew transports massive loads across the planet.

The KMAX 1200 is a world-class helicopter that can lift cargo heavier than its own body weight, and special behind-the-scenes access reveals how its bizarre design helps this engineering marvel carry record-breakingloads in extreme environments.

Alaskan engineers build a massive dam to power an entire town; the world's largest helicopters; Alaska's largest boat lift hauls a 400-ton fishing ship in high winds.

A ship built to endure tsunami size waves travels on a highway unlike any other in North America; a fleet of machines combats a huge flood in the Arctic Circle; the biggest, most powerful wind turbines in Alaska.

The Yeti, a machine with 588 sharp teeth, helps keep an airport running; tugboats break the ice in an Alaskan port; soldiers stationed at the coldest army post in the US.

An airport made from nothing but water and ice; an Alaskan fish factory churns out millions of pounds of seafood a day; hardy vehicles brave the arctic to travel across the tundra.

A barge carries an entire train along Alaska's high seas; a flying ambulance saves lives at 14,000 feet; 16 missiles stand by to prevent a nuclear disaster.

Alaska's Coast Guard fights dangerous waters to maintain buoys; machinery finds big rewards 800 feet below Alaska's surface; Alaskans build a steel ferry.

The vehicle carrier Thermopylae is one of the biggest ships ever built; facing rough waves on deadly seas, her crew must navigate their priceless cargo to destinations on the other side of the world.

The Helgafell is one of the largest vessels on the icy waters of the North Atlantic, and its crew uses the latest engineering and cutting-edge technology to cross a deadly ocean and deliver its goods before time runs out.

The Crown Princess is a titanic cruise ship that weighs more than 100,000 tons; racing the clock, its crew uses the latest technology and cutting-edge engineering to prepare for its next voyage.

A colossal container ship braves treacherous tidal waters in a race against the clock to deliver perishable cargo.

The Helgafell is one of the largest vessels on the icy waters of the North Atlantic, and its crew uses the latest engineering and cutting-edge technology to cross a deadly ocean and deliver its goods before time runs out.

The Crown Princess is a titanic cruise ship that weighs more than 100,000 tons; racing the clock, its crew uses the latest technology and cutting-edge engineering to prepare for its next voyage.

A colossal container ship braves treacherous tidal waters in a race against the clock to deliver perishable cargo.

The vehicle carrier Thermopylae is one of the biggest ships ever built; facing rough waves on deadly seas, her crew must navigate their priceless cargo to destinations on the other side of the world.

The Yeti, a machine with 588 sharp teeth, helps keep an airport running; tugboats break the ice in an Alaskan port; soldiers stationed at the coldest army post in the US.

An airport made from nothing but water and ice; an Alaskan fish factory churns out millions of pounds of seafood a day; hardy vehicles brave the arctic to travel across the tundra.

The team tests "Viral Videos" from the Internet.

Adam and Jamie test a phone book fable; Kari, Grant and Tory test a fishy tale of Hollywood.

Adam and Jamie try to turn a conventional electric stun gun into a water-powered electric stun gun.

Steel; apple juice; landing gear for aircraft; cosmetics. Host: Mark Tewksbury.

Holograms; package printing; skin cultures; canned corn. Host: Mark Tewksbury.

Custom running shoes; axes; racing karts; animatronics.

Headphones; diving regulators; reflector light bulbs.

Fly fishing reels; house paint; weaving loom; ice maker.

Graphite pencil leads; clarinets; special effects.

Rawhide lampshades; chocolate chip cookies; MRI scanners.

Noise barrier walls; front-load washers; bourbon; flexible circuit.

Railway bridge ties; membrane filters; hydraulic post drivers; bi-planes.

Hospital laundry; brass instrument restoration; horse replicas; excavation.

Traditional bows; coffee machines; mascots; hammocks.

Chains; bagels; vinyl records.

Windshields; English saddles; butter; post clocks.

Fiberglass insulation; wooden ducks; gumball machines; exhaust systems.

A medieval engineering project might be the home to the remains of the Bible's Three Magi.

New evidence could help solve some of the Great Pyramid's mysteries; the investigation into how it was built, revealing the truth about hidden tombs and other secrets.

The Red Pyramid at Dahshur is a revolutionary megastructure and the first true pyramid ever constructed in ancient Egypt; experts investigate to reveal the pharaoh who built it and the mystery behind it's trailblazing design.

Hadrian's Villa is the largest Roman palace ever constructed and demonstrates the opulent peak of Rome's ancient engineering; experts investigate secrets that could reveal the truth behind one of Rome's most enigmatic emperors.

Along with Pompeii, the devastating eruption of Mount Vesuvius left another mysterious Roman settlement buried beneath its ashes; experts reveal new evidence of an ancient civilization and history's most infamous disaster.

Scientist use cutting-edge technology to explore the supervolcano that lies beneath Yellowstone National Park.

The legendary city of Kish, Iraq, lies at the cradle of human civilization and home to some of the world's first kings; using cutting-edge tech, experts investigate the buried secrets of this lost city to uncover the first origins of royalty.

Scientist use cutting-edge technology to explore the supervolcano that lies beneath Yellowstone National Park.