On a warm summer night in July 1988, the Piper Alpha oil rig in the middle of the North Sea was the scene of the world's deadliest offshore accident.

There are many stories behind the 1940 Battle of Britain, like pilot Bill Millington who sacrifices himself to save civilians.

Blinded in one eye in the battle for Normandy, a defiant French-Canadian sniper sets out to liberate a Dutch city in the final days of the war.

When an infant is discovered dead in the River Thames, police uncover a dark underworld, where society's most vulnerable are being exploited.

On a warm summer night in July 1988, the Piper Alpha oil rig in the middle of the North Sea was the scene of the world's deadliest offshore accident.

There are many stories behind the 1940 Battle of Britain, like pilot Bill Millington who sacrifices himself to save civilians.

Blinded in one eye in the battle for Normandy, a defiant French-Canadian sniper sets out to liberate a Dutch city in the final days of the war.

Quttinirpaaq National Park is affected by climate change.

Visitors from around the world come to La Maurice National Park each fall when the leaves change.

In 1587, more than 100 English colonists who were settled on Roanoke Island vanish, baffling historians for centuries; experts use forensic archaeology to investigate the true story behind one of America's oldest mysteries.

Navigating the narrow, deep fjords that lead to Narvik, Norway, where German and British forces faced off in April 1940; repeated torpedo failures threatened to sink the mission and leave Hitler's invading troops exposed and vulnerable.

Learning why a clash over Nazi ideology wrecked a bright U-boat commander's career.

Retracing the steps of a German U-boat that's willing to do anything to replace its dwindling fuel and food stores, and get back to port; examining how the crew, plagued by scurvy, turns the tables on the US submarines that try to ram their ship.

A high-profile murder case in Brazil during the 1970s captures the world's attention and leads to a national scandal.

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 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 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 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 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.

On a warm summer night in July 1988, the Piper Alpha oil rig in the middle of the North Sea was the scene of the world's deadliest offshore accident.

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.

An elite group of British paratroopers launch a midnight raid in order to capture Hitler's unusual radar equipment.

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 legendary Battle of Trafalgar in 1805, which pitted Napoleon's French ships against a British armada under the command of Admiral Horatio Nelson.

An elite group of British paratroopers launch a midnight raid in order to capture Hitler's unusual radar equipment.

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 legendary Battle of Trafalgar in 1805, which pitted Napoleon's French ships against a British armada under the command of Admiral Horatio Nelson.

A high-profile murder case in Brazil during the 1970s captures the world's attention and leads to a national scandal.

An elite group of British paratroopers launch a midnight raid in order to capture Hitler's unusual radar equipment.

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 legendary Battle of Trafalgar in 1805, which pitted Napoleon's French ships against a British armada under the command of Admiral Horatio Nelson.

The Gulf Island National Park sits between the development of Vancouver Island and British Columbia.

Killarney Provincial Park acted as a battleground early in the environmental movement.

In 1587, more than 100 English colonists settle on Roanoke Island and soon vanish, baffling historians for centuries; now, experts use the latest forensic archaeology to investigate the true story behind America's oldest, most controversial mystery.

A US sub shows unbelievable courage in the face of impossible odds. A look into how a bomb dropped by the Japanese forces pushes the craft into a deadly dive, and ignites a toxic chemical fire that leaves the crew fighting for their lives.

A look at the failures that forced a US submarine commander to rebuild his crew's trust, one person at a time; discovering how this commanding officer overcame dissent on board and refocused on targeting enemy ships in dangerous Japanese waters.

An American submarine crew gets an order: to hunt Japanese ships that are conducting a secret VIP evacuation in the Philippines in June 1945; examining the stealthy, dangerous tactics they used that would set a US Navy record.

Scientists enter the rainforests of Barro Colorado Island, Panama to study its wildlife and the worst drought in ages.

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

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

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

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

Incredible treasures left behind by the raiders that were never found are examined, revealing the source of Han's wealth and power.

An elite group of British paratroopers launch a midnight raid in order to capture Hitler's unusual radar equipment.

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 legendary Battle of Trafalgar in 1805, which pitted Napoleon's French ships against a British armada under the command of Admiral Horatio Nelson.

An electrical failure, a rogue moose, and a supply run challenge the staff and pilots at Ted Stevens Airport.

Mike works with repair and construction teams at Dreamworld, Australia's largest theme park, after a cyclone caused $4M in damage; they fix scream machines and finish a $50M expansion featuring the world's first triple switch rollercoaster.

Defy gravity in an Amsterdam high-rise that hangs 164 feet above the water; marvel at three interconnected towers in Chicago that have a road running through them; examine the revolutionary framework of Paris' controversial Pompidou Centre.

An electrical failure, a rogue moose, and a supply run challenge the staff and pilots at Ted Stevens Airport.

Mike works with repair and construction teams at Dreamworld, Australia's largest theme park, after a cyclone caused $4M in damage; they fix scream machines and finish a $50M expansion featuring the world's first triple switch rollercoaster.

Defy gravity in an Amsterdam high-rise that hangs 164 feet above the water; marvel at three interconnected towers in Chicago that have a road running through them; examine the revolutionary framework of Paris' controversial Pompidou Centre.

Scientists enter the rainforests of Barro Colorado Island, Panama to study its wildlife and the worst drought in ages.

An electrical failure, a rogue moose, and a supply run challenge the staff and pilots at Ted Stevens Airport.

Mike works with repair and construction teams at Dreamworld, Australia's largest theme park, after a cyclone caused $4M in damage; they fix scream machines and finish a $50M expansion featuring the world's first triple switch rollercoaster.

Defy gravity in an Amsterdam high-rise that hangs 164 feet above the water; marvel at three interconnected towers in Chicago that have a road running through them; examine the revolutionary framework of Paris' controversial Pompidou Centre.

Veteran salvor Paul Hay and his team rescue a clam-dredging crew's harvest lost in a storm off the New Jersey coast; following an annual cleanup operation in New Zealand that salvages fishing equipment gone astray.

From high above, a view of Niagara Falls, Lake Ontario, the Greater Toronto Area and the wonders of Thousand Islands National Park.

Nanabijou's trails may affect dear, wolf, and moose populations.

Quetico Provincial Park pioneers forest fire strategies and faces a declining moose population.

Veteran salvor Paul Hay and his team rescue a clam-dredging crew's harvest lost in a storm off the New Jersey coast; following an annual cleanup operation in New Zealand that salvages fishing equipment gone astray.

From high above, a view of Niagara Falls, Lake Ontario, the Greater Toronto Area and the wonders of Thousand Islands National Park.

Nanabijou's trails may affect dear, wolf, and moose populations.

Quetico Provincial Park pioneers forest fire strategies and faces a declining moose population.

Jackie Kennedy's crucial role in the Kennedy years; Dolley Madison's role; Nancy Reagan's role as a First Lady.

In Jordan and Saudi Arabia, two cities, Petra and Hegra, are thought to have been centers of a "lost matriarchy.".

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

Jackie Kennedy's crucial role in the Kennedy years; Dolley Madison's role; Nancy Reagan's role as a First Lady.

In Jordan and Saudi Arabia, two cities, Petra and Hegra, are thought to have been centers of a "lost matriarchy.".

The first invasion of the Italian Campaign of WWII: Operation Husky.

Stories of ghost towns, including Pripyat and Hashima Island.

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.

An aerial tour over China shows how its ancient traditions and innovations continue to impact the country today.

The Ted Stevens crew faces a host of challenges, including a truck accident, a record day of snowfall, and the return of a wild moose.

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.

An aerial tour over China shows how its ancient traditions and innovations continue to impact the country today.

The Ted Stevens crew faces a host of challenges, including a truck accident, a record day of snowfall, and the return of a wild moose.

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.

The hunt for the missing flag draped over USA goalie after the hockey team won Olympic gold in 1980.

An aerial tour over China shows how its ancient traditions and innovations continue to impact the country today.

The Ted Stevens crew faces a host of challenges, including a truck accident, a record day of snowfall, and the return of a wild moose.

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.

Exploring the St. Lawrence Seaway from the Great Lakes to Quebec City.

Exploring the international boundary dividing the province of Quebec and the United States, from Ottawa and Montreal south.

The jewel of the Ontario parks system gives a muse to Tom Thompson and draws many researchers.

Determining the effect of global warming on the park's glaciers and wolverine population.

Exploring the St. Lawrence Seaway from the Great Lakes to Quebec City.

Exploring the international boundary dividing the province of Quebec and the United States, from Ottawa and Montreal south.

The jewel of the Ontario parks system gives a muse to Tom Thompson and draws many researchers.

Determining the effect of global warming on the park's glaciers and wolverine population.

Lady Bird Johnson, Edith Roosevelt and Betty Ford inherited the role of First Lady by chance during times when the nation was looking for stability.

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

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.

Lady Bird Johnson, Edith Roosevelt and Betty Ford inherited the role of First Lady by chance during times when the nation was looking for stability.

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

A secret British regiment in 1942 led a daring raid on a Nazi-occupied Libyan harbor.

The Ted Stevens crew faces a host of challenges, including a truck accident, a record day of snowfall, and the return of a wild moose.

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.

Mike works with repair and construction teams at Dreamworld, Australia's largest theme park, after a cyclone caused $4M in damage; they fix scream machines and finish a $50M expansion featuring the world's first triple switch rollercoaster.

Defy gravity in an Amsterdam high-rise that hangs 164 feet above the water; marvel at three interconnected towers in Chicago that have a road running through them; examine the revolutionary framework of Paris' controversial Pompidou Centre.

The Allies plan their landing in Normandy and devise a diversionary operation in the north; commando attacks continue and the resistance becomes more active; Hitler continues his building projects.

Mike works with repair and construction teams at Dreamworld, Australia's largest theme park, after a cyclone caused $4M in damage; they fix scream machines and finish a $50M expansion featuring the world's first triple switch rollercoaster.

Defy gravity in an Amsterdam high-rise that hangs 164 feet above the water; marvel at three interconnected towers in Chicago that have a road running through them; examine the revolutionary framework of Paris' controversial Pompidou Centre.

The Allies plan their landing in Normandy and devise a diversionary operation in the north; commando attacks continue and the resistance becomes more active; Hitler continues his building projects.

The hunt for the football involved in one of sports' greatest plays and a controversial championship ring.

Mike works with repair and construction teams at Dreamworld, Australia's largest theme park, after a cyclone caused $4M in damage; they fix scream machines and finish a $50M expansion featuring the world's first triple switch rollercoaster.

Defy gravity in an Amsterdam high-rise that hangs 164 feet above the water; marvel at three interconnected towers in Chicago that have a road running through them; examine the revolutionary framework of Paris' controversial Pompidou Centre.

The Allies plan their landing in Normandy and devise a diversionary operation in the north; commando attacks continue and the resistance becomes more active; Hitler continues his building projects.

Capt. John Ward and his crew are called to raise a sunken houseboat near Pensacola, Fla.; the owner of the boat wants it back, but the current occupiers of the boat living in it don't want John's services; there've been reports of gunfire too.

From the remote border town of Pohegemanook, tracing the Quebec, Maine and New Brunswick borders ending at the open waters of the Atlantic.

A healthy bison population is threatened by where they eat.

How humans discovered the planets and how they became a complex solar system.

Capt. John Ward and his crew are called to raise a sunken houseboat near Pensacola, Fla.; the owner of the boat wants it back, but the current occupiers of the boat living in it don't want John's services; there've been reports of gunfire too.

From the remote border town of Pohegemanook, tracing the Quebec, Maine and New Brunswick borders ending at the open waters of the Atlantic.

A healthy bison population is threatened by where they eat.

How humans discovered the planets and how they became a complex solar system.

Mary Lincoln, Eleanor Roosevelt and Laura Bush's role as First Ladies in calming the nation in times of war.

Archaeologists discover a link between the prophecies of the oracles and seismic activity beneath Earth's surface.

Military search and rescue efforts in deadly arctic conditions rely on a specialized helicopter with unrivaled power and endurance, and special access reveals how it works; in the Alps, a monster snow blower keeps trains running in dangerous weather.

Mary Lincoln, Eleanor Roosevelt and Laura Bush's role as First Ladies in calming the nation in times of war.

Archaeologists discover a link between the prophecies of the oracles and seismic activity beneath Earth's surface.

An elite squad of Norwegians destroy a power plant in 1943 that the Nazis may have been using for nuclear weapons research.

Mike works with repair and construction teams at Dreamworld, Australia's largest theme park, after a cyclone caused $4M in damage; they fix scream machines and finish a $50M expansion featuring the world's first triple switch rollercoaster.

Defy gravity in an Amsterdam high-rise that hangs 164 feet above the water; marvel at three interconnected towers in Chicago that have a road running through them; examine the revolutionary framework of Paris' controversial Pompidou Centre.

Looking at the engineering genius that's taken repurposing underground, from a rotting shipyard transformed into a subterranean museum to a rusting bank vault that now serves cocktails.

Unraveling centuries of bloodshed and avarice surrounding an unlucky Indian jewel; exploring a car where a Hollywood star met an untimely death; assessing the violent end of an English king's legacy and an ominous Assyrian curse etched in stone.

The Pyramid of Khufu is the only one of the Seven Wonders of the Ancient World which can still be seen in its original state.

Looking at the engineering genius that's taken repurposing underground, from a rotting shipyard transformed into a subterranean museum to a rusting bank vault that now serves cocktails.

Unraveling centuries of bloodshed and avarice surrounding an unlucky Indian jewel; exploring a car where a Hollywood star met an untimely death; assessing the violent end of an English king's legacy and an ominous Assyrian curse etched in stone.

The Pyramid of Khufu is the only one of the Seven Wonders of the Ancient World which can still be seen in its original state.

The search for Secretariat's missing Kentucky derby saddlecloth and Dale Earnhardt's first racecar.

Looking at the engineering genius that's taken repurposing underground, from a rotting shipyard transformed into a subterranean museum to a rusting bank vault that now serves cocktails.

Unraveling centuries of bloodshed and avarice surrounding an unlucky Indian jewel; exploring a car where a Hollywood star met an untimely death; assessing the violent end of an English king's legacy and an ominous Assyrian curse etched in stone.

The Pyramid of Khufu is the only one of the Seven Wonders of the Ancient World which can still be seen in its original state.

Revealing amazing Arctic wonders, from the towering ice fields of Eclipse Sound to the natural beauty of Sirmilik National Park.

Traveling from the northern point of Baffin Island onto the brilliant waters of Admiralty Inlet and ending up in the northern desert hamlet of Gjoa Haven.

Venus offers a complex story with its thick atmosphere and a substantial amount of matter.

Earth's closest neighbor, the moon, is the cosmic stepping stone to a future with the planets.

Revealing amazing Arctic wonders, from the towering ice fields of Eclipse Sound to the natural beauty of Sirmilik National Park.

Traveling from the northern point of Baffin Island onto the brilliant waters of Admiralty Inlet and ending up in the northern desert hamlet of Gjoa Haven.

Venus offers a complex story with its thick atmosphere and a substantial amount of matter.

Earth's closest neighbor, the moon, is the cosmic stepping stone to a future with the planets.

A look at how first ladies have changed their role through activism, brains and toughness.

A 4,000-year-old leather manuscript at the Cairo Museum sheds new light on The Book of the Dead from ancient Egypt.

The Yeti is a custom-made snow-eater that keeps a critical Alaskan airport open for business; experts reveal how cutting-edge engineering and the latest technology keep this machine running in the toughest conditions.

A look at how first ladies have changed their role through activism, brains and toughness.

A 4,000-year-old leather manuscript at the Cairo Museum sheds new light on The Book of the Dead from ancient Egypt.

Uncovering the inspiring stories of the U.S. Army's 761st Tank Battalion; descendants and historians discuss the honour the first armored unit of its kind, entirely composed of African-American servicemen.

Looking at the engineering genius that's taken repurposing underground, from a rotting shipyard transformed into a subterranean museum to a rusting bank vault that now serves cocktails.

The Pyramid of Khufu is the only one of the Seven Wonders of the Ancient World which can still be seen in its original state.

The U.S. gains information about space borders using unwanted battleship guns; a V2 rocket is developed from the remains of a secret Nazi base.

Witness jaw-dropping animal spectacles from high above the Earth. Watch a whirling herd of northern nomads, see undersea behemoths show off in the Pacific shallows, track a US porcine stampede, and confront top ocean predators on the Florida coast.

In 373 B.C., the Greek city of Helike vanished; archaeologists believe they've found the ruins of the great lost metropolis; using CGI, experts re-create the city's final moments and reveal its links to the greatest lost land of all - Atlantis.

The U.S. gains information about space borders using unwanted battleship guns; a V2 rocket is developed from the remains of a secret Nazi base.

Witness jaw-dropping animal spectacles from high above the Earth. Watch a whirling herd of northern nomads, see undersea behemoths show off in the Pacific shallows, track a US porcine stampede, and confront top ocean predators on the Florida coast.

In 373 B.C., the Greek city of Helike vanished; archaeologists believe they've found the ruins of the great lost metropolis; using CGI, experts re-create the city's final moments and reveal its links to the greatest lost land of all - Atlantis.

The search for a World Series home run ball and a rare bat that may have been used by a baseball legend.

The U.S. gains information about space borders using unwanted battleship guns; a V2 rocket is developed from the remains of a secret Nazi base.

Witness jaw-dropping animal spectacles from high above the Earth. Watch a whirling herd of northern nomads, see undersea behemoths show off in the Pacific shallows, track a US porcine stampede, and confront top ocean predators on the Florida coast.

In 373 B.C., the Greek city of Helike vanished; archaeologists believe they've found the ruins of the great lost metropolis; using CGI, experts re-create the city's final moments and reveal its links to the greatest lost land of all - Atlantis.

John Ward and his crew are called to salvage a massive barge upturned by a storm in a canal; Hickory Scuba Divers work to salvage a valuable sailboat that's sunk at its mooring.

Explore the Nunavut community of Gjoa Haven then head west on approach to the central Arctic hub of Cambridge Bay.

A fleet of spacecraft orbits, and sometimes lands on the surface of, Mars.

Jupiter, Saturn, Uranus and Neptune all have exotic atmospheres, liquid interiors and rings.

John Ward and his crew are called to salvage a massive barge upturned by a storm in a canal; Hickory Scuba Divers work to salvage a valuable sailboat that's sunk at its mooring.

Explore the Nunavut community of Gjoa Haven then head west on approach to the central Arctic hub of Cambridge Bay.

A fleet of spacecraft orbits, and sometimes lands on the surface of, Mars.

Jupiter, Saturn, Uranus and Neptune all have exotic atmospheres, liquid interiors and rings.

The new masters of the universe refuse to limit their imaginations, exploring space tourism, asteroid mining and colonies on Mars.

Evidence of ritual murder, human sacrifice and cannibalism in the desert valley of Chaco Canyon, New Mexico.

A helicopter made for extreme environments aids US Army rescue efforts in some of the most harsh conditions; a trio of small but capable tugboats moves cargo vessels through the busiest port of Alaska.

The new masters of the universe refuse to limit their imaginations, exploring space tourism, asteroid mining and colonies on Mars.

Evidence of ritual murder, human sacrifice and cannibalism in the desert valley of Chaco Canyon, New Mexico.

The crew of the USS George H.W. Bush aircraft carrier prepares to give air support to ground troops battling ISIS in Iraq.

Witness jaw-dropping animal spectacles from high above the Earth. Watch a whirling herd of northern nomads, see undersea behemoths show off in the Pacific shallows, track a US porcine stampede, and confront top ocean predators on the Florida coast.

In 373 B.C., the Greek city of Helike vanished; archaeologists believe they've found the ruins of the great lost metropolis; using CGI, experts re-create the city's final moments and reveal its links to the greatest lost land of all - Atlantis.

At midnight on July 30, 1945, the USS Indianapolis was sailing west on the Pacific toward the Philippines with 1,197 men on board when it was hit with two Japanese torpedoes.

The history of the F-16 Fighting Falcon and how it became the U.S. Air Force's most versatile plane.

After the landing on Normandy Beach, the Battle of Carentan breaks out and an American unit launches a desperate bayonet charge.

At midnight on July 30, 1945, the USS Indianapolis was sailing west on the Pacific toward the Philippines with 1,197 men on board when it was hit with two Japanese torpedoes.

The history of the F-16 Fighting Falcon and how it became the U.S. Air Force's most versatile plane.

After the landing on Normandy Beach, the Battle of Carentan breaks out and an American unit launches a desperate bayonet charge.

The investigation of a missing basketball and a controversial Kentucky Derby trophy.

At midnight on July 30, 1945, the USS Indianapolis was sailing west on the Pacific toward the Philippines with 1,197 men on board when it was hit with two Japanese torpedoes.

The history of the F-16 Fighting Falcon and how it became the U.S. Air Force's most versatile plane.

After the landing on Normandy Beach, the Battle of Carentan breaks out and an American unit launches a desperate bayonet charge.

West of Cambridge Bay, examine Nunavut's remote, northern waterways, from Dease Strait, to Bathurst inlet and then finally, the open waters of Coronation Gulf, and then to Kugluktuk.

The Western Nunavut region is one of the most sporadically-seen landscapes on Earth. We examine the community of Kugluktuk - Tukut Nogait National Park - and further west, the tiny hamlet of Paulatuk.

The history of the solar system might be preserved out in the dark domain of Pluto and beyond.

A dramatic repair mission gives the Hubble Space Telescope another chance to capture stunning pictures like only it can.

West of Cambridge Bay, examine Nunavut's remote, northern waterways, from Dease Strait, to Bathurst inlet and then finally, the open waters of Coronation Gulf, and then to Kugluktuk.

The Western Nunavut region is one of the most sporadically-seen landscapes on Earth. We examine the community of Kugluktuk - Tukut Nogait National Park - and further west, the tiny hamlet of Paulatuk.

The history of the solar system might be preserved out in the dark domain of Pluto and beyond.

A dramatic repair mission gives the Hubble Space Telescope another chance to capture stunning pictures like only it can.

The first invasion of the Italian Campaign of WWII: Operation Husky.

A secret British regiment in 1942 led a daring raid on a Nazi-occupied Libyan harbor.

An elite squad of Norwegians destroy a power plant in 1943 that the Nazis may have been using for nuclear weapons research.

Uncovering the inspiring stories of the U.S. Army's 761st Tank Battalion; descendants and historians discuss the honour the first armored unit of its kind, entirely composed of African-American servicemen.

The crew of the USS George H.W. Bush aircraft carrier prepares to give air support to ground troops battling ISIS in Iraq.

At midnight on July 30, 1945, the USS Indianapolis was sailing west on the Pacific toward the Philippines with 1,197 men on board when it was hit with two Japanese torpedoes.

There are many stories behind the 1940 Battle of Britain, like pilot Bill Millington who sacrifices himself to save civilians.

Blinded in one eye in the battle for Normandy, a defiant French-Canadian sniper sets out to liberate a Dutch city in the final days of the war.

American paratroopers are dropped behind German lines on D-Day in order to secure territory behind the beaches.

The Allies plan their landing in Normandy and devise a diversionary operation in the north; commando attacks continue and the resistance becomes more active; Hitler continues his building projects.

A portrayal of a crucial September 1950 military operation that helped the UN and ROK gain the upper hand over North Korea in the Korean War.

American paratroopers are dropped behind German lines on D-Day in order to secure territory behind the beaches.

The Allies plan their landing in Normandy and devise a diversionary operation in the north; commando attacks continue and the resistance becomes more active; Hitler continues his building projects.

A portrayal of a crucial September 1950 military operation that helped the UN and ROK gain the upper hand over North Korea in the Korean War.

The search for a missing Olympic gold medal won by one of the greatest sports heroes in American history.

American paratroopers are dropped behind German lines on D-Day in order to secure territory behind the beaches.

The Allies plan their landing in Normandy and devise a diversionary operation in the north; commando attacks continue and the resistance becomes more active; Hitler continues his building projects.

A portrayal of a crucial September 1950 military operation that helped the UN and ROK gain the upper hand over North Korea in the Korean War.

A journey on Scotland's River Spey, traveling from its source in the Highlands, winding by boat through the mountains to where the river meets the North Sea.

The Northern mainland coast of the Northwest Territories is a dazzling contrast in scenery - from the Smoking Hills of Bathurst peninsula - to the ethereal Tuktoyaktuk Peninsula - to the locality that shares its name.

In the future, telescopes will allow scientists to see further to planets that may support life.

In an attempt to view the cosmos beyond the scope of human vision, infrared light and gamma radiation are used.

A journey on Scotland's River Spey, traveling from its source in the Highlands, winding by boat through the mountains to where the river meets the North Sea.

The Northern mainland coast of the Northwest Territories is a dazzling contrast in scenery - from the Smoking Hills of Bathurst peninsula - to the ethereal Tuktoyaktuk Peninsula - to the locality that shares its name.

In the future, telescopes will allow scientists to see further to planets that may support life.

In an attempt to view the cosmos beyond the scope of human vision, infrared light and gamma radiation are used.

In Jordan and Saudi Arabia, two cities, Petra and Hegra, are thought to have been centers of a "lost matriarchy.".

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

Archaeologists discover a link between the prophecies of the oracles and seismic activity beneath Earth's surface.

A 4,000-year-old leather manuscript at the Cairo Museum sheds new light on The Book of the Dead from ancient Egypt.

Evidence of ritual murder, human sacrifice and cannibalism in the desert valley of Chaco Canyon, New Mexico.

American paratroopers are dropped behind German lines on D-Day in order to secure territory behind the beaches.

The Allies plan their landing in Normandy and devise a diversionary operation in the north; commando attacks continue and the resistance becomes more active; Hitler continues his building projects.

A portrayal of a crucial September 1950 military operation that helped the UN and ROK gain the upper hand over North Korea in the Korean War.

The arrival of U.S. evacuees escaping the coronavirus outbreak in China; a daring helicopter airlift; punishing snow.

Mike works with the Army Corps of Engineers on a massive project to restore essential flow of fresh water to the Florida Everglades. He also joins scientists, python hunters and the Miccosuke Tribe to eliminate invasive species.

Witness amazing buildings, bridges, lifts, and other structures that pushed structural concrete engineering to the edge.

The arrival of U.S. evacuees escaping the coronavirus outbreak in China; a daring helicopter airlift; punishing snow.

Mike works with the Army Corps of Engineers on a massive project to restore essential flow of fresh water to the Florida Everglades. He also joins scientists, python hunters and the Miccosuke Tribe to eliminate invasive species.

Witness amazing buildings, bridges, lifts, and other structures that pushed structural concrete engineering to the edge.

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.

The arrival of U.S. evacuees escaping the coronavirus outbreak in China; a daring helicopter airlift; punishing snow.

Mike works with the Army Corps of Engineers on a massive project to restore essential flow of fresh water to the Florida Everglades. He also joins scientists, python hunters and the Miccosuke Tribe to eliminate invasive species.

Witness amazing buildings, bridges, lifts, and other structures that pushed structural concrete engineering to the edge.

Journey along the MacKenzie River Delta southwest following the winter ice road before ending in the transportation and cultural hub of the area, Inuvik.

From the district of Inuvik - travel west - above the MacKenzie Delta - open tundra - and the Richardson Mountains - to the northernmost land separating Canada and the US.

Advanced telescopes capture images of the night sky from the Atacama Desert.

The Northern Lights tells the story of the makeup of the planet, the sun and possibly life on other planets.

Journey along the MacKenzie River Delta southwest following the winter ice road before ending in the transportation and cultural hub of the area, Inuvik.

From the district of Inuvik - travel west - above the MacKenzie Delta - open tundra - and the Richardson Mountains - to the northernmost land separating Canada and the US.

Advanced telescopes capture images of the night sky from the Atacama Desert.

The Northern Lights tells the story of the makeup of the planet, the sun and possibly life on other planets.

Windsor was the safe haven that kept Princess Elizabeth and her sister Margaret safe during the war, and it is where Elizabeth fell in love with Prince Philip.

Many experts believe King Arthur was a mythical figure; however, new evidence from ancient sites suggests that the Arthurian legend is rooted in fact, and it may finally answer the question of whether this storied king was real or myth.

Salvaging a 50-foot motor yacht in Islamorda, Fla.; a 44-foot launch hung up on a dam on the Mississippi River; repairing a major storm gate in the British Isles.

Windsor was the safe haven that kept Princess Elizabeth and her sister Margaret safe during the war, and it is where Elizabeth fell in love with Prince Philip.

Many experts believe King Arthur was a mythical figure; however, new evidence from ancient sites suggests that the Arthurian legend is rooted in fact, and it may finally answer the question of whether this storied king was real or myth.

In April 1945, the Yamato, the largest battleship in history, leaves for Okinawa to destroy American warships and prevent their landing; weighing 70,000 tonnes and armed with 150 guns, it faced the U.S.

The U.S. gains information about space borders using unwanted battleship guns; a V2 rocket is developed from the remains of a secret Nazi base.

Unraveling centuries of bloodshed and avarice surrounding an unlucky Indian jewel; exploring a car where a Hollywood star met an untimely death; assessing the violent end of an English king's legacy and an ominous Assyrian curse etched in stone.