Mike in north eastern Australia, going on and under the water, into labs and onto construction projects working with specialized teams as they tackle the daunting challenge of saving dying coral on the incredible Great Barrier R.

Paying tribute to the brave, gravity-defying design of the U.S. National Medal of Honor Museum; traveling to Singapore for a look at a leaning tower of gambling, then exploring a New York City office building that lets the sun shine through.

Investigate the costs of Hitler's Soviet invasion, which aims to give the Nazis control over a key nickel mine and a transportation hub; seeing how this summer battle turns into a bitter winter war as the Allies tighten their grip on the Arctic.

Dr. Lindsey Fitzharris explores the mysterious death of Brian Jones, founder of the Rolling Stones.

Mike in north eastern Australia, going on and under the water, into labs and onto construction projects working with specialized teams as they tackle the daunting challenge of saving dying coral on the incredible Great Barrier R.

Paying tribute to the brave, gravity-defying design of the U.S. National Medal of Honor Museum; traveling to Singapore for a look at a leaning tower of gambling, then exploring a New York City office building that lets the sun shine through.

Investigate the costs of Hitler's Soviet invasion, which aims to give the Nazis control over a key nickel mine and a transportation hub; seeing how this summer battle turns into a bitter winter war as the Allies tighten their grip on the Arctic.

Lunar and solar eclipses.

An exploration of the astrophysics of stars creating matter.

Revealing the truth behind the planet's ancient legends; touring an island covered in polar bears, twin craters in Greece, peeking at a supervolcano hidden under Yellowstone Park and examining an ocean formation that's eerily similar to Atlantis.

A rich mix of coastal towns, islands, inland mountains and seascapes from Nanaimo to Campbell River.

The true story of the F-14 Tomcat, the military aircraft made famous in "Top Gun"; how it served as the US Navy's top carrier fighter for a generation.

A look at the amphibious aircraft and the many roles it served during WWII, from patrol bomber to search-and-rescue aircraft.

The Boeing B-17 Flying Fortress is one of the most lethal bombers of the U.S. Air Force in WWII's European and Pacific campaigns; among other things, the plane delivered food to the German-occupied Netherlands.

A look at the British multi-role fighter aircraft; the de Havilland Mosquito was used in the Second World War as a bomber, fighter and reconnaissance aircraft.

The engineers who designed and built Saturn V, the rocket that made JFK's dream to put a man on the moon a reality.

The engineers who built the Apollo Lunar Module, which allowed astronauts to land on the moon and then launch back into orbit.

The story of the engineers who created the world's first reusable space vehicle.

The Last 747 captures the emotion around the build of Boeing's last 747 jumbo jet and also tells the story of how this one airplane completely transformed the economics of air travel - with huge implications for globalization, trade and geopolitics.

STOL drag racers face off in their annual competition. Legendary pilot Patty Wagstaff teaches two students what to do when things go wrong. Archer aviation hopes to change how we move as they work to get their EVTOL Aircraft into the sky.

The Civil Air Patrol and Air National Guard aim to protect the skies; a high-speed race that requires a special kind of training in Reno; Dave Edwards proves that anyone can fly with a little money and effort.

Grant Korgan uses his "hero flights" to uplift other disabled veterans and first responders. Fly For The Culture inspires young people of color to pursue a future in aviation. A photographer and pilot recreate an iconic photo over New York City.

Hurricane Hunters get their weather lab ready for hurricane season. PHI Medical faces the challenges of transporting patients quickly and safely. Erick O'Connor conducts a two day boot camp on formation flying to teach pilots how to fly together.

Unearthing a doomed ice age discovery in Russia's Arctic; unveiling a Dutch painting that spells misfortune; digging up a king's unlikely final resting place in an English marsh.

Takes a look inside the Pyramid of Menkaure and its unfinished bicolor monument, including a chamber made entirely of graphite and a sarcophagus buried at sea.

After the king of France targets the Knights Templar, they face imprisonment, torture and executions, but their legacy endures through present day.

Unearthing a doomed ice age discovery in Russia's Arctic; unveiling a Dutch painting that spells misfortune; digging up a king's unlikely final resting place in an English marsh.

Takes a look inside the Pyramid of Menkaure and its unfinished bicolor monument, including a chamber made entirely of graphite and a sarcophagus buried at sea.

Dr. Fitzharris hunts for the identity of the saddest victim of the Titanic: a two-year-old child.

After the king of France targets the Knights Templar, they face imprisonment, torture and executions, but their legacy endures through present day.

Unearthing a doomed ice age discovery in Russia's Arctic; unveiling a Dutch painting that spells misfortune; digging up a king's unlikely final resting place in an English marsh.

Takes a look inside the Pyramid of Menkaure and its unfinished bicolor monument, including a chamber made entirely of graphite and a sarcophagus buried at sea.

An exploration of the science behind the Anthropic Principle.

Isaac Brock's daring made him a hero, but may also be his flaw.

Walking among colossal wonders scattered across the Earth's surface, including an ancient reptile skeleton, a massive head carving in the Alberta badlands, a giant South African footprint and a pentagram etched into a remote peninsula in Kazakhstan.

From scenic Telegraph Cove, around Cape Scott Provincial Park, and beyond.

An orphaned bear cub flies to a new home, bush pilots bring life-saving medical machinery to a remote village, record snowfall threatens to close down Anchorage Airport for Thanksgiving, and the US Army prepares for airborne war.

A breakdown on the Fairbanks runway threatens a heavy-weight military jet's urgent mission; a rookie flight instructor faces a make-or-break flight; an ice-tour pilot races against Alaskan weather; a bush airline flies a 400-mile pizza delivery.

A major snowstorm disrupts Christmas travel in Anchorage; bush pilots aid an Arctic village after a fire; ice jeopardizes an airborne science mission; Customs agents combat a surge in illegal holiday food imports.

A Coast Guard chopper pilot battles winds in a mission that will decide her flying career; a mountain construction project gets an express aerial delivery of materials in Alaska-style; two bald eagles hitch a first-class ride.

A trainee chopper pilot tackles a mid-air engine shutdown. Bush pilots face a high-altitude test on an aerial grocery run. The US Army in Alaska launch their biggest helicopter deployment ever, and an Arctic-sports phenom flies.

The most-produced bomber in US history, used during World War II by every branch of the American military, as well as by the Royal Air Force.

A look at the top U.S. military aircraft in America's modern arsenal, including the F-117 Nighthawk stealth fighter, the hybrid V-22 Osprey, and more.

A countdown of the most influential and impactful military planes of the Cold War, from America's B-2 to the Soviet's MiG-15.

A countdown of the ten greatest military planes of World War II, including the Japanese Zero, the Nazi ME 109, and the B-29 Superfortress.

Features captain Chuck Yeager, the pilot who broke the sound barrier and changed aviation forever, and his brilliant team and the Bell X-1 jet that made a breakthrough possible.

Investigators try to determine what caused a routine commuter flight to crash.

Two crashed Cessnas baffle investigators.

Investigators determine why a plane crashes on Alaska's Kenai Peninsula.

The Dendera Temple is one of the best-preserved temples in all of Egypt; experts decipher its mystifying zodiac images and uncover the ceremonial events that took place at this sacred site, and stunning CGI rebuilds this grand complex in its prime.

A strange, deserted city in America's heartland, a gigantic wall deep in snowcapped mountains, and a mysterious top-secret Soviet facility are deserted engineering projects, and new discoveries reveal how they were built and why they were abandoned.

Features captain Chuck Yeager, the pilot who broke the sound barrier and changed aviation forever, and his brilliant team and the Bell X-1 jet that made a breakthrough possible.

The Dendera Temple is one of the best-preserved temples in all of Egypt; experts decipher its mystifying zodiac images and uncover the ceremonial events that took place at this sacred site, and stunning CGI rebuilds this grand complex in its prime.

Dr. Fitzharris and her team examine the death of actress Brittany Murphy to see if it was an accident or foul play.

A strange, deserted city in America's heartland, a gigantic wall deep in snowcapped mountains, and a mysterious top-secret Soviet facility are deserted engineering projects, and new discoveries reveal how they were built and why they were abandoned.

Features captain Chuck Yeager, the pilot who broke the sound barrier and changed aviation forever, and his brilliant team and the Bell X-1 jet that made a breakthrough possible.

The Dendera Temple is one of the best-preserved temples in all of Egypt; experts decipher its mystifying zodiac images and uncover the ceremonial events that took place at this sacred site, and stunning CGI rebuilds this grand complex in its prime.

Charles de Salaberry is forced to rely on cunning tactics.

With her husband wounded, Laura Secord sets out to warn the British of a possible American attack.

Traipsing along ancient pathways criss-crossing Easter Island; finding gigantic designs carved into Asia's Eastern Steppe; ascending a tall pyramid rising from Antarctica's icy landscape.

A collection of scenic towns, parks and coastal rainforest unique in the world.

Engineers come together to create the International Space Station, humanity's first permanent outpost in space; the largest space structure ever created.

The inside story of the Hubble Space Telescope that almost broke NASA; the engineers behind its creation tell their story and how they staked their careers on repairing it.

Project Viking set out to create a Mars lander with a miniature laboratory designed to travel more than 500 times the distance from Earth to the moon.

Newly uncovered records reveal why the seemingly reliable plane was headed toward disaster and what could have been done to prevent it.

In the wilds of Southern Africa, aviation takes over where roads don't go. Extreme Airport Africa brings you into the world of high-octane, high-risk bush flying where pilots brave rough runways, wild fires and wild animals.

A P51 Mustang takes a combat veteran back in time. A bush aviator flies a mission to save rhinos from extinction. Mechanics race to fit new engines on an air ambulance heading into a warzone, and a pilot takes control of a jet f.

In the wilds of Southern Africa, aviation takes over where roads don't go. Extreme Airport Africa brings you into the world of high-octane, high-risk bush flying where pilots brave rough runways, wild fires and wild animals.

A bush airport fights fire with fire. Flying Namibian cowboys race against the heat to save antelope from drought. A father and son duo of mechanics tackle a test that could make or break their careers, and an endangered Pangoli.

A look at the rise and fall of the infamous Nazi dive bomber Ju-87 Stuka, an aircraft of World War II.

During the Vietnam War, the United States needed a helicopter that could defend itself; the AH-1 Cobra, the world's first pure attack helicopter.

The inside story of how the AH/MH-6 evolved over the decades to become an irreplacable aircraft for the U.S. Military.

An inside look at the U.S. Air Force's largest aircraft, the C-5 Galaxy; its most dramatic combat and peacetime missions over the last 50 years.

The Japanese attack on Pearl Harbor triggers the U.S. entering WWII; we reveal the secret stories behind the battle such as that of Dorie Miller.

A U.S. Parachute Infantry Regiment rushes to protect a critical bridge from a Nazi battle group during the opening days of the Battle of the Bulge.

On the evening of May 3, 1999, the residents of Oklahoma City were hit with a devastating tornado.

The Japanese attack on Pearl Harbor triggers the U.S. entering WWII; we reveal the secret stories behind the battle such as that of Dorie Miller.

A U.S. Parachute Infantry Regiment rushes to protect a critical bridge from a Nazi battle group during the opening days of the Battle of the Bulge.

Dr. Lindsey Fitzharris and her team revisit the life and death of Houdini to learn for sure if he died of a ruptured appendix or foul play.

On the evening of May 3, 1999, the residents of Oklahoma City were hit with a devastating tornado.

The Japanese attack on Pearl Harbor triggers the U.S. entering WWII; we reveal the secret stories behind the battle such as that of Dorie Miller.

A U.S. Parachute Infantry Regiment rushes to protect a critical bridge from a Nazi battle group during the opening days of the Battle of the Bulge.

Tecumseh forges an alliance with the British in pursuit of his dream.

John Norton leads Six Nations warriors against the invading Americans.

Exploring some of the most cavernous places on the planet, including an expansive Siberian crater with no explainable origin, Greenland's bizarre black holes, an ancient forbidden well in the Yemeni desert, and a voluminous void in Antarctica.

BC's lower mainland is a mix of remote mountain ranges, spectacular cityscapes and marine life.

The inside story of the ultimate stealth fighter, the F-22 Raptor, and its predecessors.

The world's most versatile and powerful helicopters, including the Huey that served as a rescue helicopter in Vietnam, and the Apache attack helicopter.

Exploring the history of the F-18 and how the U.S. Navy's dual-role aircraft has dominated both the air and the battlefields for over three decades.

Considered the deadliest fighter of WWII, Germany's Me-109s were feared by Allied bombers and fighters alike; 109s fought Spitfires in the Battle of Britain and alongside Rommel in North Africa.

A mystery emerges after a single-engine floatplane crashes.

A trip goes wrong when a pilot's Piper Super Cub crashes into a treacherous waterway.

Evidence is lost to a fire after a Cessna crash on a public road, challenging investigators.

Scientists fly to save Anchorage from avalanche destruction. Border agents stop a potential insect invasion at Anchorage International. A bush pilot flies explosive cargo for a village festival, and the Coast Guard race to repai.

A DC-6 flies into fuel-freezing weather to deliver vital medicine. A rookie Coast Guard rescue swimmer faces his final helicopter test.

Two pilots try to build a new bush plane from 70-year-old designs. The Army gets its big guns airborne to protect America's north. Hurricane-force winds threaten Anchorage International, and NASA scientists blast off from Alaska.

A pilot races to fly food to a homesteader. Entrepreneurs reviving a 1940's airframe land on ice to prove it can be the future of bush flying. Trainee plane mechanics face a crucial test, and an airport night guardian calls time.

The Coast Guard flies a twelve-ton fuel truck to keep a remote base operational. An athlete flies to a dangerous airport for a glacier race. Fairbanks crews fight an avian invasion, and after a decade in a museum, a Grumman Goo.

Investigate the costs of Hitler's Soviet invasion, which aims to give the Nazis control over a key nickel mine and a transportation hub; seeing how this summer battle turns into a bitter winter war as the Allies tighten their grip on the Arctic.

A look at experimental ships and revolutionary designers that have changed the tide of war through the centuries.

Footage of life and death on the battlefield of El Alamein and behind the lines in the African desert.

Investigate the costs of Hitler's Soviet invasion, which aims to give the Nazis control over a key nickel mine and a transportation hub; seeing how this summer battle turns into a bitter winter war as the Allies tighten their grip on the Arctic.

A look at experimental ships and revolutionary designers that have changed the tide of war through the centuries.

Dr. Lindsey Fitzharris and her team try to determine who fired the shot that killed drug lord Pablo Escobar.

Footage of life and death on the battlefield of El Alamein and behind the lines in the African desert.

Investigate the costs of Hitler's Soviet invasion, which aims to give the Nazis control over a key nickel mine and a transportation hub; seeing how this summer battle turns into a bitter winter war as the Allies tighten their grip on the Arctic.

A look at experimental ships and revolutionary designers that have changed the tide of war through the centuries.

East coast shipper creates a private fleet to seize American ships.

Top Gun flight instructors show the famous and prestigious training program in the sky, and reveal the tactics and techniques taught in the classroom and in the air; examining how the real Navy Top Gun came to be.

A perfect circle carved around an ancient peak; a scary phenomenon in the Pacific; strange shapes in a Middle Eastern desert; a formation below the ocean's surface.

The Sea to Sky corridor reveals one of the west coast's most iconic landscapes.

STOL drag racers face off in their annual competition. Legendary pilot Patty Wagstaff teaches two students what to do when things go wrong. Archer aviation hopes to change how we move as they work to get their EVTOL Aircraft into the sky.

The Civil Air Patrol and Air National Guard aim to protect the skies; a high-speed race that requires a special kind of training in Reno; Dave Edwards proves that anyone can fly with a little money and effort.

Grant Korgan uses his "hero flights" to uplift other disabled veterans and first responders. Fly For The Culture inspires young people of color to pursue a future in aviation. A photographer and pilot recreate an iconic photo over New York City.

Hurricane Hunters get their weather lab ready for hurricane season. PHI Medical faces the challenges of transporting patients quickly and safely. Erick O'Connor conducts a two day boot camp on formation flying to teach pilots how to fly together.

The inside story of the Avro Lancaster, the British bomber that was rushed into service to fight back against Nazi Germany.

An inside look at the Panavia Tornado's evolution from a Cold War low-level bomber to a high-level fighter-interceptor.

The history of the F-111 and how the fighter-bomber no one wanted went on to dominate both air and battlefields in the late 20th century.

An inside look at the P47 Thunderbolt and the critical role it played in both the European and Pacific Theaters of World War II.

An SOS from an island of penguins sends a helicopter team on an emergency mission; a young pilot attempts a record-breaking flight; aircraft maintenance teams tackle a dangerous fluid leak; vets in Zambia stop a war between humans and elephants.

A mid-air engine shutdown forces maintenance teams to scramble. A helicopter pilot flies engineers onto live power lines. A rookie pilot flies his first solo anti-poaching patrol, and scientists fly to track down a pride of lion.

A skilled canine team tracks birds disrupting Africa's busiest airport. Mechanics race to fix a cargo hauler for the largest bush airline. Helicopter pilots meet ships near the Cape of Good Hope, while flying doctors deliver life-saving surgery.

A helicopter security team flees extreme weather. A bush pilot faces a test that will determine his aviation future. UN aviators fly emergency missions over Madagascar, and vets take to the skies for a flight to save the Black Rhino from extinction.

Mike joins crews as they build the world's longest railway tunnel in the Alps, fixing gridlock through the infamous Brenner Pass by drilling, blasting and digging their way through the mountains.

Peek inside a cloud-inspired library in Canada that's built over a live railway; see how clever engineering helped a huge Seattle skyscraper go up without harming its iconic neighbour, then cross an Australian bridge that floats above a busy river.

Thanksgiving weekend and severe storms challenge the staff at Ted Stevens Airport with heavy traffic, heavy snow, and even a lightning strike.

Mike joins crews as they build the world's longest railway tunnel in the Alps, fixing gridlock through the infamous Brenner Pass by drilling, blasting and digging their way through the mountains.

Peek inside a cloud-inspired library in Canada that's built over a live railway; see how clever engineering helped a huge Seattle skyscraper go up without harming its iconic neighbour, then cross an Australian bridge that floats above a busy river.

The story of the 16th century warship Mars the Magnificent and the modern-day expedition that found her deep in the Baltic Sea.

Thanksgiving weekend and severe storms challenge the staff at Ted Stevens Airport with heavy traffic, heavy snow, and even a lightning strike.

Mike joins crews as they build the world's longest railway tunnel in the Alps, fixing gridlock through the infamous Brenner Pass by drilling, blasting and digging their way through the mountains.

Peek inside a cloud-inspired library in Canada that's built over a live railway; see how clever engineering helped a huge Seattle skyscraper go up without harming its iconic neighbour, then cross an Australian bridge that floats above a busy river.

The Grasslands National Park protects the North American mixed grass prairie.

Despite being the second smallest park in Canada, Point Pelee bird watching reputation is huge.

Decoding the secrets of long-lost human settlements; scrutinizing a mysterious Norwegian mound, a prehistoric stone circle on the banks of the Tagus River, a lost city in the cradle of civilization and bizarre rock shapes.

The Sunshine coast features world famous mountain ranges, forest landscapes and iconic towns.

Exploring offshore islands, inland volcanoes and forgotten World War II defense fortifications north of Powell River.

BC's inland waterways.

When a body is discovered in a bombed-out London church, investigators race to determine if it was caused by the Nazi Blitz or a local killer.

A behind-the-scenes look at the meticulous preparations involved in carrying out the Tower's biggest naval event: the Constable's Dues.

A look at how acts of resistance and rebellion during slavery paved the way to abolition.

An up-close look at NASA's decades-long mission to reach and explore Mars, including its latest rover, the high-tech Perseverance.

A behind-the-scenes look at the meticulous preparations involved in carrying out the Tower's biggest naval event: the Constable's Dues.

A look at how acts of resistance and rebellion during slavery paved the way to abolition.

A different view of the events in the Arctic during World War II, with countless unknown details; a focus on the struggle of the great powers for control of the area and its natural resources.

A strange, deserted city in America's heartland, a gigantic wall deep in snowcapped mountains, and a mysterious top-secret Soviet facility are deserted engineering projects, and new discoveries reveal how they were built and why they were abandoned.

Unearthing a doomed ice age discovery in Russia's Arctic; unveiling a Dutch painting that spells misfortune; digging up a king's unlikely final resting place in an English marsh.

An aerial tour over New Zealand showcases a diverse world of snow-capped mountains, active volcanoes, and a storied past.

Record snowfall and vicious headwinds threaten the runways and a sea plane pilot.

A baboon invasion on a runway threatens to cut off a remote safari lodge, engine faults wreck airline flight schedules and a wild cheetah gets a first taste of flying.

An aerial tour over New Zealand showcases a diverse world of snow-capped mountains, active volcanoes, and a storied past.

Record snowfall and vicious headwinds threaten the runways and a sea plane pilot.

A baboon invasion on a runway threatens to cut off a remote safari lodge, engine faults wreck airline flight schedules and a wild cheetah gets a first taste of flying.

When a body is discovered in a bombed-out London church, investigators race to determine if it was caused by the Nazi Blitz or a local killer.

An aerial tour over New Zealand showcases a diverse world of snow-capped mountains, active volcanoes, and a storied past.

Record snowfall and vicious headwinds threaten the runways and a sea plane pilot.

A baboon invasion on a runway threatens to cut off a remote safari lodge, engine faults wreck airline flight schedules and a wild cheetah gets a first taste of flying.

The civilization of the first and finest national park in Canada, is surrounded by untamed wildlife.

The Bruce Peninsula is the largest natural landscape remaining in Southern Ontario.

Zoom in on some otherworldly sights; spot a giant glacier on the Red Planet, let the milky seas off the coast of Java bathe your vision, ponder a huge hexagon floating above Saturn and take a spin around a doughnut-shaped lake in Saskatchewan.

An epic, high-altitude journey from Seven Sisters Provincial Park to Salmon Glacier.

An epic, high-altitude journey from Seven Sisters Provincial Park to Salmon Glacier.

The creation legends of Naikoon Provincial Park; rich sea lion colonies; remote lighthouses.

The story of "America's first serial killer," who stalked Chicago in the 1890's, and how the police departments of two major cities finally brought him to justice.

We examine life for the Yeoman Warders once they're off duty and gain unique access to a history-making archeological dig by the Tower's parish church.

The journeys of two actors confronting their personal connection to slavery.

An inside look at the July 2000 crash of an Air France Concorde jet and series of events that caused the accident.

We examine life for the Yeoman Warders once they're off duty and gain unique access to a history-making archeological dig by the Tower's parish church.

The journeys of two actors confronting their personal connection to slavery.

A different view of the events in the Arctic during World War II, with countless unknown details; a focus on the struggle of the great powers for control of the area and its natural resources.

Record snowfall and vicious headwinds threaten the runways and a sea plane pilot.

A baboon invasion on a runway threatens to cut off a remote safari lodge, engine faults wreck airline flight schedules and a wild cheetah gets a first taste of flying.

Mike joins crews as they build the world's longest railway tunnel in the Alps, fixing gridlock through the infamous Brenner Pass by drilling, blasting and digging their way through the mountains.

Peek inside a cloud-inspired library in Canada that's built over a live railway; see how clever engineering helped a huge Seattle skyscraper go up without harming its iconic neighbour, then cross an Australian bridge that floats above a busy river.

The scale of World War II grows as the United States joins the war; explore the operations where Allied commando troops raid the Norwegian coast.

Mike joins crews as they build the world's longest railway tunnel in the Alps, fixing gridlock through the infamous Brenner Pass by drilling, blasting and digging their way through the mountains.

Peek inside a cloud-inspired library in Canada that's built over a live railway; see how clever engineering helped a huge Seattle skyscraper go up without harming its iconic neighbour, then cross an Australian bridge that floats above a busy river.

The scale of World War II grows as the United States joins the war; explore the operations where Allied commando troops raid the Norwegian coast.

The story of "America's first serial killer," who stalked Chicago in the 1890's, and how the police departments of two major cities finally brought him to justice.

Mike joins crews as they build the world's longest railway tunnel in the Alps, fixing gridlock through the infamous Brenner Pass by drilling, blasting and digging their way through the mountains.

Peek inside a cloud-inspired library in Canada that's built over a live railway; see how clever engineering helped a huge Seattle skyscraper go up without harming its iconic neighbour, then cross an Australian bridge that floats above a busy river.

The scale of World War II grows as the United States joins the war; explore the operations where Allied commando troops raid the Norwegian coast.

The Pacific Rim National Park Reserve is one of Canada's most beautiful and powerful parks.

This oldest National Park in the Canadian Maritimes is home to the highest density of moose in the world.

Explores strongholds abandoned by their architects; a lost city in the Amazon jungle; a desert fortress made by humanity's most notorious empire; explores a city of identical castles; examines a Greek isle's bloody history from the air.

A cultural and geological past told through the stunning landscape of Gwaii Haanas National Park Reserve.

Tourists explore the far reaches of northern Canada and gain exclusive access to polar bears on custom-built rovers; the Twin Otter aircraft drops much-needed supplies to isolated villages.

A wind farm depends on the all-terrain abilities of the Hagglund BV206 in Sweden.

When a woman is found dead in the cellar of an Edinburgh doctor in 1828, police uncover a murky world where murders are being committed for money.

An inside look at how Hampton Court's warders and staff open and close the palace to the public; a look at the marriage of Henry VIII and Jane Seymour.

Witness little-known stories of the global slave trade involving an African musician, Thomas Jefferson, and more.

Tourists explore the far reaches of northern Canada and gain exclusive access to polar bears on custom-built rovers; the Twin Otter aircraft drops much-needed supplies to isolated villages.

An inside look at how Hampton Court's warders and staff open and close the palace to the public; a look at the marriage of Henry VIII and Jane Seymour.

Witness little-known stories of the global slave trade involving an African musician, Thomas Jefferson, and more.

A different view of the events in the Arctic during World War II, with countless unknown details; a focus on the struggle of the great powers for control of the area and its natural resources.

Mike joins crews as they build the world's longest railway tunnel in the Alps, fixing gridlock through the infamous Brenner Pass by drilling, blasting and digging their way through the mountains.

Peek inside a cloud-inspired library in Canada that's built over a live railway; see how clever engineering helped a huge Seattle skyscraper go up without harming its iconic neighbour, then cross an Australian bridge that floats above a busy river.

In Spain, pilgrims walk the Camino de Santiago, ending with a visit to a shrine believed to hold the bones of Saint James the Great; new research suggests that the Camino may have been a sacred pathway long before the Christian age.

Tallying the carnage that followed the disappearance of a Russian wonder; exploring Incan sacrificial rituals; studying a global rivalry sparked by an Egyptian stone; seeing the haunting paintings of a Spanish artist who descended into madness.

Exceptional texts are inscribed on the walls of an obscure pyramid; experts scan the the funerary chamber of Egypt's longest-reigning pharaoh to try to uncover its mysteries.

In Spain, pilgrims walk the Camino de Santiago, ending with a visit to a shrine believed to hold the bones of Saint James the Great; new research suggests that the Camino may have been a sacred pathway long before the Christian age.

Tallying the carnage that followed the disappearance of a Russian wonder; exploring Incan sacrificial rituals; studying a global rivalry sparked by an Egyptian stone; seeing the haunting paintings of a Spanish artist who descended into madness.

Exceptional texts are inscribed on the walls of an obscure pyramid; experts scan the the funerary chamber of Egypt's longest-reigning pharaoh to try to uncover its mysteries.

When a woman is found dead in the cellar of an Edinburgh doctor in 1828, police uncover a murky world where murders are being committed for money.

In Spain, pilgrims walk the Camino de Santiago, ending with a visit to a shrine believed to hold the bones of Saint James the Great; new research suggests that the Camino may have been a sacred pathway long before the Christian age.

Tallying the carnage that followed the disappearance of a Russian wonder; exploring Incan sacrificial rituals; studying a global rivalry sparked by an Egyptian stone; seeing the haunting paintings of a Spanish artist who descended into madness.

Exceptional texts are inscribed on the walls of an obscure pyramid; experts scan the the funerary chamber of Egypt's longest-reigning pharaoh to try to uncover its mysteries.

The Torngat Mountains National Park was set up in part to return the aboriginal people to their birthright.

Riding Mountain National Park in Manitoba.

Peek at landmarks in places where they shouldn't be; wing your way over an imperial pyramid in the Netherlands, a metal sphere in remote Russia, a lion shape carved into an English hillside and a bare swath cut through an Austrian forest.

A special drone uses cutting-edge technology to fly deep into treacherous, hard-to-reach mountains on dangerous search and rescue missions, and a hi-tech ice machine works tirelessly at a Toronto airport to keep flights running in brutal conditions.

Exploring machines invented for human survival in the extreme cold across the planet.

Crawling down the Red River, the Amphibex protects those who live along it during the thaw, while the Hercules C-130 J takes to the Arctic skies of the Canadian North; preparing for summer exploratory missions is Swedish built icebreaker Oden.

While Nazi Germany attempts to cover up the brutal murders of a serial killer, a brilliant detective uses early forensic methods to bring him to justice.

Exploring the palace's 60 acres of stunning gardens, its haunted corridor, and the doomed marriage of Henry VIII and Catherine Howard.

A look at racial injustices before and after slavery was abolished and the struggles that continue today.

A wind farm depends on the all-terrain abilities of the Hagglund BV206 in Sweden.

Exploring the palace's 60 acres of stunning gardens, its haunted corridor, and the doomed marriage of Henry VIII and Catherine Howard.

A look at racial injustices before and after slavery was abolished and the struggles that continue today.

A different view of the events in the Arctic during World War II, with countless unknown details; a focus on the struggle of the great powers for control of the area and its natural resources.

In Spain, pilgrims walk the Camino de Santiago, ending with a visit to a shrine believed to hold the bones of Saint James the Great; new research suggests that the Camino may have been a sacred pathway long before the Christian age.

Exceptional texts are inscribed on the walls of an obscure pyramid; experts scan the the funerary chamber of Egypt's longest-reigning pharaoh to try to uncover its mysteries.