In pursuit of their Aryan dream, the Nazis were encumbered by an ideological war from within that would undermine their ability to succeed in World War II.

The inside story of the F-86 Sabre, one of America's first fighter jets, and its epic battles against the Soviet MiG jet during the Korean War and beyond.

Relive the daring 17-minute hostage rescue at the Iranian Embassy in London that was caught on live TV. Learn how US teams ran deniable missions in Southeast Asia, then see the global threat of a Russian nuclear cruise missile with limitless range.

In pursuit of their Aryan dream, the Nazis were encumbered by an ideological war from within that would undermine their ability to succeed in World War II.

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 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.

In pursuit of their Aryan dream, the Nazis were encumbered by an ideological war from within that would undermine their ability to succeed in World War II.

Navigating the historic Potomac River from West Virginia to Chesapeake Bay, passing through Washington, D.C. and the national monuments and ending at George Washington's Mount Vernon estate.

Learning why an important urban center is sinking toward oblivion; soaring over sprawling ruins buried under Saharan sands; learning the modern secret of an ancient fortress; eyeing a ghost town on the edge of the Gobi.

Phil Risko's team at Northstar works fast to refloat a trawler that's been blown onto the shore of a national park in New Jersey; the team improvises to get it back to sea before it suffers further damage.

Navigating the historic Potomac River from West Virginia to Chesapeake Bay, passing through Washington, D.C. and the national monuments and ending at George Washington's Mount Vernon estate.

Learning why an important urban center is sinking toward oblivion; soaring over sprawling ruins buried under Saharan sands; learning the modern secret of an ancient fortress; eyeing a ghost town on the edge of the Gobi.

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

Paid programming.

Follow the meteoric rise of the Macedonian conqueror who seized Egypt and built an empire that stretched from Europe to Asia; find out how founding the city of Alexandria and becoming a pharaoh transformed Alexander's life before his death at age 32.

Uncover the secrets of the Old Kingdom ruler who revolutionized architecture alongside his vizier, Imhotep; piece together the mysterious life of the very first king to build a step pyramid in the heart of a grandiose and complex burial site.

Ramesses II reigns for 66 years and builds monuments and temples.

The inside story of the F-86 Sabre, one of America's first fighter jets, and its epic battles against the Soviet MiG jet during the Korean War and beyond.

Relive the daring 17-minute hostage rescue at the Iranian Embassy in London that was caught on live TV. Learn how US teams ran deniable missions in Southeast Asia, then see the global threat of a Russian nuclear cruise missile with limitless range.

In pursuit of their Aryan dream, the Nazis were encumbered by an ideological war from within that would undermine their ability to succeed in World War II.

The inside story of the F-86 Sabre, one of America's first fighter jets, and its epic battles against the Soviet MiG jet during the Korean War and beyond.

Relive the daring 17-minute hostage rescue at the Iranian Embassy in London that was caught on live TV. Learn how US teams ran deniable missions in Southeast Asia, then see the global threat of a Russian nuclear cruise missile with limitless range.

Track German tank commander Georg Gaertner, vanishes from a U.S. POW camp and eludes the FBI for 40 years; learn how two escaped Auschwitz prisoners help save countless lives and how Nazi officer Adolf Eichmann is finally brought to justice.

An American 2nd lieutenant sends his company back during an enemy counterattack during the Allied bid to clear the Colmar Pocket; he tries to hold off the German soldiers with his carbine rifle and calling in artillery but runs out of bullets.

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

Track German tank commander Georg Gaertner, vanishes from a U.S. POW camp and eludes the FBI for 40 years; learn how two escaped Auschwitz prisoners help save countless lives and how Nazi officer Adolf Eichmann is finally brought to justice.

An American 2nd lieutenant sends his company back during an enemy counterattack during the Allied bid to clear the Colmar Pocket; he tries to hold off the German soldiers with his carbine rifle and calling in artillery but runs out of bullets.

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

Follow the meteoric rise of the Macedonian conqueror who seized Egypt and built an empire that stretched from Europe to Asia; find out how founding the city of Alexandria and becoming a pharaoh transformed Alexander's life before his death at age 32.

Uncover the secrets of the Old Kingdom ruler who revolutionized architecture alongside his vizier, Imhotep; piece together the mysterious life of the very first king to build a step pyramid in the heart of a grandiose and complex burial site.

Ramesses II reigns for 66 years and builds monuments and temples.

Delve into the history of the Fourth Dynasty monarch responsible for one of the great pyramids; examine the tyrannical reputation of this ancient leader and decipher the complex strategies he used to guide such a massive building project.

A journey down one of the wild rivers in the world, the Yukon; the unusual trip starts in an aircraft piloted by a painter and the odyssey ends with a visit to a graveyard of disintegrating rear-wheel steamers.

Get petrified by cryptic rock structures normally hidden from view; look inside curious dwellings in the Peruvian Andes; visit a sacred monolith in Wyoming's Black Hills; haunt a Turkish stone village; spot an immovable waterfall in Mexico.

At the mouth of the Suez Canal, Lino Arosemena and his crew have a monster repair job of removing and refitting a 20-ton propeller.

A journey down one of the wild rivers in the world, the Yukon; the unusual trip starts in an aircraft piloted by a painter and the odyssey ends with a visit to a graveyard of disintegrating rear-wheel steamers.

Get petrified by cryptic rock structures normally hidden from view; look inside curious dwellings in the Peruvian Andes; visit a sacred monolith in Wyoming's Black Hills; haunt a Turkish stone village; spot an immovable waterfall in Mexico.

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

Paid programming.

Delve into the history of the Fourth Dynasty monarch responsible for one of the great pyramids; examine the tyrannical reputation of this ancient leader and decipher the complex strategies he used to guide such a massive building project.

Chart the turbulent reign of a brilliant strategist who allied herself with powerful Roman leaders in the hopes of saving her kingdom; examine the battle against Octavian that ended three millennia of Egyptian history and sealed Cleopatra's fate.

Track German tank commander Georg Gaertner, vanishes from a U.S. POW camp and eludes the FBI for 40 years; learn how two escaped Auschwitz prisoners help save countless lives and how Nazi officer Adolf Eichmann is finally brought to justice.

An American 2nd lieutenant sends his company back during an enemy counterattack during the Allied bid to clear the Colmar Pocket; he tries to hold off the German soldiers with his carbine rifle and calling in artillery but runs out of bullets.

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

Track German tank commander Georg Gaertner, vanishes from a U.S. POW camp and eludes the FBI for 40 years; learn how two escaped Auschwitz prisoners help save countless lives and how Nazi officer Adolf Eichmann is finally brought to justice.

An American 2nd lieutenant sends his company back during an enemy counterattack during the Allied bid to clear the Colmar Pocket; he tries to hold off the German soldiers with his carbine rifle and calling in artillery but runs out of bullets.

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

Visiting the Vancouver House, Norway's Under restaurant and the Seattle Central Library to discover how these visionary buildings were created.

Mike is in Iceland, where teams harness the power of volcanos to keep the geothermal energy flowing; they battle harsh weather to maintain and upgrade giant power systems, fixing miles of steam pipes, and bringing a dead well back to life.

Going under one of the world's largest lakes for a multi-million dollar tunnel boring project in one of the fastest growing cities on Earth.

Visiting the Vancouver House, Norway's Under restaurant and the Seattle Central Library to discover how these visionary buildings were created.

Mike is in Iceland, where teams harness the power of volcanos to keep the geothermal energy flowing; they battle harsh weather to maintain and upgrade giant power systems, fixing miles of steam pipes, and bringing a dead well back to life.

Going under one of the world's largest lakes for a multi-million dollar tunnel boring project in one of the fastest growing cities on Earth.

Chart the turbulent reign of a brilliant strategist who allied herself with powerful Roman leaders in the hopes of saving her kingdom; examine the battle against Octavian that ended three millennia of Egyptian history and sealed Cleopatra's fate.

Unearth the dramatic final days of the Twentieth Dynasty's great warrior king, Ramses III; view a rare judicial papyrus that recounts the story of an assassination plot hatched in the royal harem; see what the monarch's mummy reveals today.

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.

Meandering through the black waters of a primordial river immortalized in a folk song.

Witness 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 U.S. porcine stampede; confront top ocean predators on the Florida coast.

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.

Meandering through the black waters of a primordial river immortalized in a folk song.

Witness 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 U.S. porcine stampede; confront top ocean predators on the Florida coast.

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.

Look into the strange disappearance of the Lost Colony of Roanoke in 1590, then discover how the Hope Diamond was stolen during the French Revolution; pinpoint new clues that could explain why the USS Cyclops vanished in 1918 in the Bermuda Triangle.

Contemplate the strange disappearance and reappearance of the master of macabre, Edgar Allan Poe, just before his death in 1849; explore the chilling rumor that Shakespeare's grave was robbed, then chase down thieves who stole the Mona Lisa in 1911.

Visiting the Vancouver House, Norway's Under restaurant and the Seattle Central Library to discover how these visionary buildings were created.

Mike is in Iceland, where teams harness the power of volcanos to keep the geothermal energy flowing; they battle harsh weather to maintain and upgrade giant power systems, fixing miles of steam pipes, and bringing a dead well back to life.

Going under one of the world's largest lakes for a multi-million dollar tunnel boring project in one of the fastest growing cities on Earth.

Visiting the Vancouver House, Norway's Under restaurant and the Seattle Central Library to discover how these visionary buildings were created.

Mike is in Iceland, where teams harness the power of volcanos to keep the geothermal energy flowing; they battle harsh weather to maintain and upgrade giant power systems, fixing miles of steam pipes, and bringing a dead well back to life.

Going under one of the world's largest lakes for a multi-million dollar tunnel boring project in one of the fastest growing cities on Earth.

An airliner dodges thunderstorms flying to a cyclone-damaged island; aerial firefighters cross the country to battle infernos; daredevil chainsaw operators hang underneath helicopters.

Bush aviators push the limit of their plane to deliver a two-ton generator; in Fairbanks, slippery runways threaten the International Ice Carving Championship and a high-tech airframe inspection on a Boeing 737 uncovers a potential issue.

A journey across Central Italy from the air reveals the ancient Rome, the bloody medieval battles of Tuscany and the colossal marble quarries of Carrara.

An airliner dodges thunderstorms flying to a cyclone-damaged island; aerial firefighters cross the country to battle infernos; daredevil chainsaw operators hang underneath helicopters.

Bush aviators push the limit of their plane to deliver a two-ton generator; in Fairbanks, slippery runways threaten the International Ice Carving Championship and a high-tech airframe inspection on a Boeing 737 uncovers a potential issue.

A journey across Central Italy from the air reveals the ancient Rome, the bloody medieval battles of Tuscany and the colossal marble quarries of Carrara.

An airliner dodges thunderstorms flying to a cyclone-damaged island; aerial firefighters cross the country to battle infernos; daredevil chainsaw operators hang underneath helicopters.

Look into the strange disappearance of the Lost Colony of Roanoke in 1590, then discover how the Hope Diamond was stolen during the French Revolution; pinpoint new clues that could explain why the USS Cyclops vanished in 1918 in the Bermuda Triangle.

Contemplate the strange disappearance and reappearance of the master of macabre, Edgar Allan Poe, just before his death in 1849; explore the chilling rumor that Shakespeare's grave was robbed, then chase down thieves who stole the Mona Lisa in 1911.

Bush aviators push the limit of their plane to deliver a two-ton generator; in Fairbanks, slippery runways threaten the International Ice Carving Championship and a high-tech airframe inspection on a Boeing 737 uncovers a potential issue.

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.

Get a bird's-eye view of a mysterious explosion in China and a quickly melting glacier on Earth's iciest continent; investigate an orange haze enveloping the Big Apple, then float over a toxic, too-hot-to-handle lake in New Zealand.

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.

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.

Get a bird's-eye view of a mysterious explosion in China and a quickly melting glacier on Earth's iciest continent; investigate an orange haze enveloping the Big Apple, then float over a toxic, too-hot-to-handle lake in New Zealand.

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.

Investigate the sudden death of a tycoon linked to King Tut's tomb; search for three lighthouse keepers who vanished from the Flannan Isles, then analyze the gruesome, unexplained deaths of nine hikers at the Dyatlov Pass in the Ural Mountains.

Uncover how a royal imprisoned two princes and took the British throne; ponder how the Irish crown jewels were stolen from a locked safe inside Dublin Castle, then see if the death of Amy Robsart at Elizabeth I's court was an accident or murder.

An airliner dodges thunderstorms flying to a cyclone-damaged island; aerial firefighters cross the country to battle infernos; daredevil chainsaw operators hang underneath helicopters.

Bush aviators push the limit of their plane to deliver a two-ton generator; in Fairbanks, slippery runways threaten the International Ice Carving Championship and a high-tech airframe inspection on a Boeing 737 uncovers a potential issue.

A journey across Central Italy from the air reveals the ancient Rome, the bloody medieval battles of Tuscany and the colossal marble quarries of Carrara.

An airliner dodges thunderstorms flying to a cyclone-damaged island; aerial firefighters cross the country to battle infernos; daredevil chainsaw operators hang underneath helicopters.

Bush aviators push the limit of their plane to deliver a two-ton generator; in Fairbanks, slippery runways threaten the International Ice Carving Championship and a high-tech airframe inspection on a Boeing 737 uncovers a potential issue.

A journey across Central Italy from the air reveals the ancient Rome, the bloody medieval battles of Tuscany and the colossal marble quarries of Carrara.

Follow American M18 Hellcat tank destroyers as they sweep to victory across Europe and watch flamethrower tanks help the Allies claim island after island in Japan. Then see how WW II's lessons culminated in the modern main battle tank.

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.

Tease out the common denominators that lead to tyranny; map the rise of some of the 20th century's dictators and discover how they seized power, exploited governing systems and gutted existing power structures to gain total control.

Follow American M18 Hellcat tank destroyers as they sweep to victory across Europe and watch flamethrower tanks help the Allies claim island after island in Japan. Then see how WW II's lessons culminated in the modern main battle tank.

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.

Tease out the common denominators that lead to tyranny; map the rise of some of the 20th century's dictators and discover how they seized power, exploited governing systems and gutted existing power structures to gain total control.

Follow American M18 Hellcat tank destroyers as they sweep to victory across Europe and watch flamethrower tanks help the Allies claim island after island in Japan. Then see how WW II's lessons culminated in the modern main battle tank.

Investigate the sudden death of a tycoon linked to King Tut's tomb; search for three lighthouse keepers who vanished from the Flannan Isles, then analyze the gruesome, unexplained deaths of nine hikers at the Dyatlov Pass in the Ural Mountains.

Uncover how a royal imprisoned two princes and took the British throne; ponder how the Irish crown jewels were stolen from a locked safe inside Dublin Castle, then see if the death of Amy Robsart at Elizabeth I's court was an accident or murder.

Follow American M18 Hellcat tank destroyers as they sweep to victory across Europe and watch flamethrower tanks help the Allies claim island after island in Japan. Then see how WW II's lessons culminated in the modern main battle tank.

A journey along Ireland's longest river, the Shannon, through an emerald green landscape of rolling hills and sparkling waters; how Vikings, monks and kings have all made their mark.

Examine mysterious holes in Israel; explore a ghost village hidden in the Colombian jungle, a shipwreck off the coast of Sri Lanka and a gutted airplane fuselage abandoned in Iceland.

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.

A journey along Ireland's longest river, the Shannon, through an emerald green landscape of rolling hills and sparkling waters; how Vikings, monks and kings have all made their mark.

Examine mysterious holes in Israel; explore a ghost village hidden in the Colombian jungle, a shipwreck off the coast of Sri Lanka and a gutted airplane fuselage abandoned in Iceland.

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.

Hunt for the Amber Room, a Nazi-looted treasure that disappeared in 1944; track the final flight of bandleader Glenn Miller over the English Channel, then re-examine the arrest of Anne Frank to see if she was betrayed or a victim of coincidence.

Question whether Napoleon Bonaparte was poisoned in exile, then find out whose bones were buried underneath Benjamin Franklin's London home; analyze evidence that suggests that Grand Duchess Anastasia may have escaped the 1918 Romanov massacre.

Follow American M18 Hellcat tank destroyers as they sweep to victory across Europe and watch flamethrower tanks help the Allies claim island after island in Japan. Then see how WW II's lessons culminated in the modern main battle tank.

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.

Tease out the common denominators that lead to tyranny; map the rise of some of the 20th century's dictators and discover how they seized power, exploited governing systems and gutted existing power structures to gain total control.

Follow American M18 Hellcat tank destroyers as they sweep to victory across Europe and watch flamethrower tanks help the Allies claim island after island in Japan. Then see how WW II's lessons culminated in the modern main battle tank.

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.

Tease out the common denominators that lead to tyranny; map the rise of some of the 20th century's dictators and discover how they seized power, exploited governing systems and gutted existing power structures to gain total control.

The engineering secrets behind the world's steepest mountain railway, a remodeled 145-year-old museum and a futuristic condo.

The Black Pyramid is a decaying brick-and-clay structure that contains an elaborate network of tunnels filled with ancient artifacts; Egyptologists use a mini-laser to uncover the mysteries contained within.

Chart the turbulent reign of a brilliant strategist who allied herself with powerful Roman leaders in the hopes of saving her kingdom; examine the battle against Octavian that ended three millennia of Egyptian history and sealed Cleopatra's fate.

The engineering secrets behind the world's steepest mountain railway, a remodeled 145-year-old museum and a futuristic condo.

The Black Pyramid is a decaying brick-and-clay structure that contains an elaborate network of tunnels filled with ancient artifacts; Egyptologists use a mini-laser to uncover the mysteries contained within.

Chart the turbulent reign of a brilliant strategist who allied herself with powerful Roman leaders in the hopes of saving her kingdom; examine the battle against Octavian that ended three millennia of Egyptian history and sealed Cleopatra's fate.

The engineering secrets behind the world's steepest mountain railway, a remodeled 145-year-old museum and a futuristic condo.

Hunt for the Amber Room, a Nazi-looted treasure that disappeared in 1944; track the final flight of bandleader Glenn Miller over the English Channel, then re-examine the arrest of Anne Frank to see if she was betrayed or a victim of coincidence.

Question whether Napoleon Bonaparte was poisoned in exile, then find out whose bones were buried underneath Benjamin Franklin's London home; analyze evidence that suggests that Grand Duchess Anastasia may have escaped the 1918 Romanov massacre.

Chart the turbulent reign of a brilliant strategist who allied herself with powerful Roman leaders in the hopes of saving her kingdom; examine the battle against Octavian that ended three millennia of Egyptian history and sealed Cleopatra's fate.

The journey down the attraction-packed Niagara River is filled with adventure and beauty; navigating the fascinating history and engineering of this border river between Canada and the United States, arriving at the world-famous Niagara Falls.

Investigate an abandoned village in the shifting sands on Dubai's outskirts and a collection of inexplicable stone circles in Colombia; a mysterious hilltop tower in Iran and a puzzling purple phenomenon in Chile's Atacama Desert.

Salvor and treasure seeker Phil Risko sets out to retrieve valuable 80-year-old hardwood logs from the bottom of the sea; a multi-million dollar cruise vessel undergoes emergency repairs in Panama.

The journey down the attraction-packed Niagara River is filled with adventure and beauty; navigating the fascinating history and engineering of this border river between Canada and the United States, arriving at the world-famous Niagara Falls.

Investigate an abandoned village in the shifting sands on Dubai's outskirts and a collection of inexplicable stone circles in Colombia; a mysterious hilltop tower in Iran and a puzzling purple phenomenon in Chile's Atacama Desert.

Salvor and treasure seeker Phil Risko sets out to retrieve valuable 80-year-old hardwood logs from the bottom of the sea; a multi-million dollar cruise vessel undergoes emergency repairs in Panama.

Joining the manhunt for three inmates who escaped Alcatraz in 1962; following the trail of pirate Henry Avery after he pulled off a massive heist in 1695, then stalking Axeman of New Orleans, a serial killer who taunted police but spared jazz lovers.

Revisit the crimes of Jack the Ripper as investigators try to ID his first victim; chase the Mad Gasser, who terrorized an Illinois town in 1944, then hunt for the Servant Girl Annihilator, a killer who stalked Austin, Texas, in the darkness.

The engineering secrets behind the world's steepest mountain railway, a remodeled 145-year-old museum and a futuristic condo.

The Black Pyramid is a decaying brick-and-clay structure that contains an elaborate network of tunnels filled with ancient artifacts; Egyptologists use a mini-laser to uncover the mysteries contained within.

Chart the turbulent reign of a brilliant strategist who allied herself with powerful Roman leaders in the hopes of saving her kingdom; examine the battle against Octavian that ended three millennia of Egyptian history and sealed Cleopatra's fate.

The engineering secrets behind the world's steepest mountain railway, a remodeled 145-year-old museum and a futuristic condo.

The Black Pyramid is a decaying brick-and-clay structure that contains an elaborate network of tunnels filled with ancient artifacts; Egyptologists use a mini-laser to uncover the mysteries contained within.

Chart the turbulent reign of a brilliant strategist who allied herself with powerful Roman leaders in the hopes of saving her kingdom; examine the battle against Octavian that ended three millennia of Egyptian history and sealed Cleopatra's fate.

Examine a unique silver scroll found in a collapsed Umayyad-period house in Jerash, Jordan; watch an advanced CT scanner penetrate its lead casing, revealing mysterious grooves and an enigmatic message that suggests it may be a protective amulet.

Puzzling over history-making structures and artifacts; Searching for clues about civilization's origins in Göbekli Tepe, visiting a German statue that reveals symbolic thought; witnessing the brutality of colonization in a Mexican skull tower.

Joining the manhunt for three inmates who escaped Alcatraz in 1962; following the trail of pirate Henry Avery after he pulled off a massive heist in 1695, then stalking Axeman of New Orleans, a serial killer who taunted police but spared jazz lovers.

Examine a unique silver scroll found in a collapsed Umayyad-period house in Jerash, Jordan; watch an advanced CT scanner penetrate its lead casing, revealing mysterious grooves and an enigmatic message that suggests it may be a protective amulet.

Puzzling over history-making structures and artifacts; Searching for clues about civilization's origins in Göbekli Tepe, visiting a German statue that reveals symbolic thought; witnessing the brutality of colonization in a Mexican skull tower.

Joining the manhunt for three inmates who escaped Alcatraz in 1962; following the trail of pirate Henry Avery after he pulled off a massive heist in 1695, then stalking Axeman of New Orleans, a serial killer who taunted police but spared jazz lovers.

Examine a unique silver scroll found in a collapsed Umayyad-period house in Jerash, Jordan; watch an advanced CT scanner penetrate its lead casing, revealing mysterious grooves and an enigmatic message that suggests it may be a protective amulet.

Joining the manhunt for three inmates who escaped Alcatraz in 1962; following the trail of pirate Henry Avery after he pulled off a massive heist in 1695, then stalking Axeman of New Orleans, a serial killer who taunted police but spared jazz lovers.

Revisit the crimes of Jack the Ripper as investigators try to ID his first victim; chase the Mad Gasser, who terrorized an Illinois town in 1944, then hunt for the Servant Girl Annihilator, a killer who stalked Austin, Texas, in the darkness.

Joining the manhunt for three inmates who escaped Alcatraz in 1962; following the trail of pirate Henry Avery after he pulled off a massive heist in 1695, then stalking Axeman of New Orleans, a serial killer who taunted police but spared jazz lovers.

A breathtaking journey down the German section of the beautiful Moselle river, famous for vineyards on its dramatically steep banks and remarkable meandering loops.

Come across a set of disturbingly familiar stone monoliths in Colombia, then explore a lost city in the Sierra Nevada de Santa Marta; puzzle over an ancient ruin in Corinth, Greece, and explore an old structure on a Maltese island.

Responding to an emergency call, Northstar marine sets out to salvage a sunken tug in the Delaware Bay; following the devastation caused by Hurricane Sally, Capt. Chris Ward and his crew work to salvage sunken sailboats and wrecked powerboats.

A breathtaking journey down the German section of the beautiful Moselle river, famous for vineyards on its dramatically steep banks and remarkable meandering loops.

Come across a set of disturbingly familiar stone monoliths in Colombia, then explore a lost city in the Sierra Nevada de Santa Marta; puzzle over an ancient ruin in Corinth, Greece, and explore an old structure on a Maltese island.

Responding to an emergency call, Northstar marine sets out to salvage a sunken tug in the Delaware Bay; following the devastation caused by Hurricane Sally, Capt. Chris Ward and his crew work to salvage sunken sailboats and wrecked powerboats.

Determining if exotic dancer Mata Hari was a spy or just a wartime scapegoat; solving the riddle of Kaspar Hauser, the boy who appeared from nowhere; trying to identify the Man in the Iron Mask, who died in a French prison without revealing his face.

Diving into the mystery of the HMS Terror, an Arctic ship found 150 years after it and its crew vanished without a trace; seeing if the explosion of the SS Sultana on the Mississippi was an accident or sabotage; boarding the ghost ship Mary Celeste.

Examine a unique silver scroll found in a collapsed Umayyad-period house in Jerash, Jordan; watch an advanced CT scanner penetrate its lead casing, revealing mysterious grooves and an enigmatic message that suggests it may be a protective amulet.

Puzzling over history-making structures and artifacts; Searching for clues about civilization's origins in Göbekli Tepe, visiting a German statue that reveals symbolic thought; witnessing the brutality of colonization in a Mexican skull tower.

Joining the manhunt for three inmates who escaped Alcatraz in 1962; following the trail of pirate Henry Avery after he pulled off a massive heist in 1695, then stalking Axeman of New Orleans, a serial killer who taunted police but spared jazz lovers.

Examine a unique silver scroll found in a collapsed Umayyad-period house in Jerash, Jordan; watch an advanced CT scanner penetrate its lead casing, revealing mysterious grooves and an enigmatic message that suggests it may be a protective amulet.

Puzzling over history-making structures and artifacts; Searching for clues about civilization's origins in Göbekli Tepe, visiting a German statue that reveals symbolic thought; witnessing the brutality of colonization in a Mexican skull tower.

Joining the manhunt for three inmates who escaped Alcatraz in 1962; following the trail of pirate Henry Avery after he pulled off a massive heist in 1695, then stalking Axeman of New Orleans, a serial killer who taunted police but spared jazz lovers.

Early victories in World War II injected Hitler with a precipitous sense of over-confidence that was eventually tested and proven vulnerable.

The story of the world's first nuclear bomber, the B-29, and its explosive impact on aerial warfare.

Witness the fierce urban combat of the Battle of Mogadishu after a quick mission spirals out of control. Explore the fallout from a downed Cold War spy plane, then cheer on the commandos who crippled the Nazi atomic program in a daring raid.

Early victories in World War II injected Hitler with a precipitous sense of over-confidence that was eventually tested and proven vulnerable.

The story of the world's first nuclear bomber, the B-29, and its explosive impact on aerial warfare.

Witness the fierce urban combat of the Battle of Mogadishu after a quick mission spirals out of control. Explore the fallout from a downed Cold War spy plane, then cheer on the commandos who crippled the Nazi atomic program in a daring raid.

Early victories in World War II injected Hitler with a precipitous sense of over-confidence that was eventually tested and proven vulnerable.

Determining if exotic dancer Mata Hari was a spy or just a wartime scapegoat; solving the riddle of Kaspar Hauser, the boy who appeared from nowhere; trying to identify the Man in the Iron Mask, who died in a French prison without revealing his face.

Diving into the mystery of the HMS Terror, an Arctic ship found 150 years after it and its crew vanished without a trace; seeing if the explosion of the SS Sultana on the Mississippi was an accident or sabotage; boarding the ghost ship Mary Celeste.

Early victories in World War II injected Hitler with a precipitous sense of over-confidence that was eventually tested and proven vulnerable.

New York's Hudson River stretches 315 miles through natural landscapes, from the Adirondack Mountains to the George Washington Bridge and Statue of Liberty.

Unlock an abandoned site on a remote Antarctic isle and check out mysterious shapes in the Finnish snow. Puzzle over an inexplicable monolith in the far reaches of Norway, then get shocked by a blood-red frozen waterfall at the bottom of the world.

A mysterious object is raised from the depths of the ocean; a stranded speedboat; an elite crew works to salvage America's biggest shipwreck before hurricane season.

New York's Hudson River stretches 315 miles through natural landscapes, from the Adirondack Mountains to the George Washington Bridge and Statue of Liberty.

Unlock an abandoned site on a remote Antarctic isle and check out mysterious shapes in the Finnish snow. Puzzle over an inexplicable monolith in the far reaches of Norway, then get shocked by a blood-red frozen waterfall at the bottom of the world.

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

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Look into the strange disappearance of the Lost Colony of Roanoke in 1590, then discover how the Hope Diamond was stolen during the French Revolution; pinpoint new clues that could explain why the USS Cyclops vanished in 1918 in the Bermuda Triangle.

Contemplate the strange disappearance and reappearance of the master of macabre, Edgar Allan Poe, just before his death in 1849; explore the chilling rumor that Shakespeare's grave was robbed, then chase down thieves who stole the Mona Lisa in 1911.

Investigate the sudden death of a tycoon linked to King Tut's tomb; search for three lighthouse keepers who vanished from the Flannan Isles, then analyze the gruesome, unexplained deaths of nine hikers at the Dyatlov Pass in the Ural Mountains.

The story of the world's first nuclear bomber, the B-29, and its explosive impact on aerial warfare.

Witness the fierce urban combat of the Battle of Mogadishu after a quick mission spirals out of control. Explore the fallout from a downed Cold War spy plane, then cheer on the commandos who crippled the Nazi atomic program in a daring raid.

Follow American M18 Hellcat tank destroyers as they sweep to victory across Europe and watch flamethrower tanks help the Allies claim island after island in Japan. Then see how WW II's lessons culminated in the modern main battle tank.

The story of the world's first nuclear bomber, the B-29, and its explosive impact on aerial warfare.

Witness the fierce urban combat of the Battle of Mogadishu after a quick mission spirals out of control. Explore the fallout from a downed Cold War spy plane, then cheer on the commandos who crippled the Nazi atomic program in a daring raid.

Revisit Colditz Castle, a Nazi fortress where breakouts featured human catapults and clever disguises; meet the pilots who staged the famed Great Escape from a Polish stalag; see how 32 POWs pulled off the Warburg Wire Job in just one minute.

U.S. paratroopers that dropped into France before the D-Day landings battle Nazi defenders for a key bridge behind enemy lines.

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.

Revisit Colditz Castle, a Nazi fortress where breakouts featured human catapults and clever disguises; meet the pilots who staged the famed Great Escape from a Polish stalag; see how 32 POWs pulled off the Warburg Wire Job in just one minute.

U.S. paratroopers that dropped into France before the D-Day landings battle Nazi defenders for a key bridge behind enemy lines.

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.

Revisit Colditz Castle, a Nazi fortress where breakouts featured human catapults and clever disguises; meet the pilots who staged the famed Great Escape from a Polish stalag; see how 32 POWs pulled off the Warburg Wire Job in just one minute.

Look into the strange disappearance of the Lost Colony of Roanoke in 1590, then discover how the Hope Diamond was stolen during the French Revolution; pinpoint new clues that could explain why the USS Cyclops vanished in 1918 in the Bermuda Triangle.

Contemplate the strange disappearance and reappearance of the master of macabre, Edgar Allan Poe, just before his death in 1849; explore the chilling rumor that Shakespeare's grave was robbed, then chase down thieves who stole the Mona Lisa in 1911.

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.

Bill Nighy narrates a trip along the River Po, traveling across northern Italy from the snow-capped Alps to the delta where it meets the Adriatic Sea.

The view from above reveals baffling behavior from one of the ocean's fastest fish; whales with a strange, aquatic accessorizing habit; a confounding congregation of sharks down under; a perplexing collection of circles decorating the seabed.

A salvage maestro returns to raise more valuable tropical hardwood trying not to wreck his own boat in the process; the multimillion dollar operation to salvage America's biggest shipwreck.

Bill Nighy narrates a trip along the River Po, traveling across northern Italy from the snow-capped Alps to the delta where it meets the Adriatic Sea.

The view from above reveals baffling behavior from one of the ocean's fastest fish; whales with a strange, aquatic accessorizing habit; a confounding congregation of sharks down under; a perplexing collection of circles decorating the seabed.

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

Paid programming.

Uncover how a royal imprisoned two princes and took the British throne; ponder how the Irish crown jewels were stolen from a locked safe inside Dublin Castle, then see if the death of Amy Robsart at Elizabeth I's court was an accident or murder.

Hunt for the Amber Room, a Nazi-looted treasure that disappeared in 1944; track the final flight of bandleader Glenn Miller over the English Channel, then re-examine the arrest of Anne Frank to see if she was betrayed or a victim of coincidence.

Revisit Colditz Castle, a Nazi fortress where breakouts featured human catapults and clever disguises; meet the pilots who staged the famed Great Escape from a Polish stalag; see how 32 POWs pulled off the Warburg Wire Job in just one minute.

U.S. paratroopers that dropped into France before the D-Day landings battle Nazi defenders for a key bridge behind enemy lines.

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.

Revisit Colditz Castle, a Nazi fortress where breakouts featured human catapults and clever disguises; meet the pilots who staged the famed Great Escape from a Polish stalag; see how 32 POWs pulled off the Warburg Wire Job in just one minute.

U.S. paratroopers that dropped into France before the D-Day landings battle Nazi defenders for a key bridge behind enemy lines.

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.

Visiting London's Gherkin, Seattle's Evergreen Point Floating Bridge and Lyon's Musée des Confluences to uncover how and why they were built.

In Florida, Mike tackles one of the dangerous jobs on the planet, commercial diving; he helps a specialized team keep waterways safe; fixing construction site leaks and removing dangerous structures, all while hurricane season is in full swing.

Flying on one of the biggest helicopters on Earth, on a quest to pull valuable timber from the forest; huge repairs threaten to bring this mission to a halt.

Visiting London's Gherkin, Seattle's Evergreen Point Floating Bridge and Lyon's Musée des Confluences to uncover how and why they were built.

In Florida, Mike tackles one of the dangerous jobs on the planet, commercial diving; he helps a specialized team keep waterways safe; fixing construction site leaks and removing dangerous structures, all while hurricane season is in full swing.

Flying on one of the biggest helicopters on Earth, on a quest to pull valuable timber from the forest; huge repairs threaten to bring this mission to a halt.

Visiting London's Gherkin, Seattle's Evergreen Point Floating Bridge and Lyon's Musée des Confluences to uncover how and why they were built.

Uncover how a royal imprisoned two princes and took the British throne; ponder how the Irish crown jewels were stolen from a locked safe inside Dublin Castle, then see if the death of Amy Robsart at Elizabeth I's court was an accident or murder.

Hunt for the Amber Room, a Nazi-looted treasure that disappeared in 1944; track the final flight of bandleader Glenn Miller over the English Channel, then re-examine the arrest of Anne Frank to see if she was betrayed or a victim of coincidence.

In Florida, Mike tackles one of the dangerous jobs on the planet, commercial diving; he helps a specialized team keep waterways safe; fixing construction site leaks and removing dangerous structures, all while hurricane season is in full swing.

Bill Nighy leads a magical journey in the Norfolk Broads along England's holiday river, the River Bure; discovering a watery world where both wildlife and recreation go hand in hand.

The view from above reveals a derelict complex of pod-like structures with seemingly alien origins; a bewildering concrete construction in the mountains of Bosnia; a puzzling collection of out of place shapes discarded in the wilds of Greenland.

The team must remove thousands of wrecked cars from the hull before it becomes an environmental disaster; repairing a vessel before the waters of the River Solent flood the hull.

Bill Nighy leads a magical journey in the Norfolk Broads along England's holiday river, the River Bure; discovering a watery world where both wildlife and recreation go hand in hand.

The view from above reveals a derelict complex of pod-like structures with seemingly alien origins; a bewildering concrete construction in the mountains of Bosnia; a puzzling collection of out of place shapes discarded in the wilds of Greenland.

The team must remove thousands of wrecked cars from the hull before it becomes an environmental disaster; repairing a vessel before the waters of the River Solent flood the hull.

Traveling to New York, Denver and Nice, France to visit Little Island, the Denver Museum of Art and La Tête Carrée; the secrets to how they were built are revealed.

Mike Davidson heads to Brazil, where an offshore crew is racing the clock to set up giant power ships to deliver electricity to a country in desperate need.

Visiting London's Gherkin, Seattle's Evergreen Point Floating Bridge and Lyon's Musée des Confluences to uncover how and why they were built.

In Florida, Mike tackles one of the dangerous jobs on the planet, commercial diving; he helps a specialized team keep waterways safe; fixing construction site leaks and removing dangerous structures, all while hurricane season is in full swing.

Flying on one of the biggest helicopters on Earth, on a quest to pull valuable timber from the forest; huge repairs threaten to bring this mission to a halt.

Visiting London's Gherkin, Seattle's Evergreen Point Floating Bridge and Lyon's Musée des Confluences to uncover how and why they were built.

In Florida, Mike tackles one of the dangerous jobs on the planet, commercial diving; he helps a specialized team keep waterways safe; fixing construction site leaks and removing dangerous structures, all while hurricane season is in full swing.

Flying on one of the biggest helicopters on Earth, on a quest to pull valuable timber from the forest; huge repairs threaten to bring this mission to a halt.