Guest comedian Rachel Bloom.

A volcanic island off the coast of Antarctica with a mysterious past; the mummified remains of a teenage girl in the Peruvian Andes; a shipwreck is found near Russia's Franz Josef Archipelago; strange holes appearing in snow in Japan.

Examine a Revolutionary War-era ship found in the rubble of the World Trade Center. Uncover a mass grave of Viking settlers in Oxford, visit the resistance bunkers of the Warsaw Ghetto Uprising, and tour a necropolis full of burial jars in Corsica.

Encounter kids' drawings on the walls in Pompeii that expose the city's violent gladiatorial past; check out a mythical sculpture unearthed by an Indian tsunami, a 12-century temple in quake-prone Mexico; a sunken ship in Utah's Great Salt Lake.

Catastrophe strikes a crucial allied air supply route in WWII as 15 planes never return; London's River Thames ices up so much, a fair is held on it; a mission to the Moon narrowly avoids disaster.

The science behind some of the most incredible engineering accidents ever filmed is revealed; a look at the physics involved as well as forensic details to explain the slip-ups that turned construction into destruction.

Budding entrepreneurs get three minutes to pitch their business ideas to five multimillionaires who are willing to invest their own cash to kick-start the businesses in the original "Shark Tank." After each pitch, the Dragons have the opportunity to ask questions about the venture. The entrepreneurs don't always have to answer, but of course what they choose not to address could very well affect the outcome. The pitch is over when each of the Dragons has declared,"I'm out." Evan Davis hosts.

On Aug. 17, 2020, a series of lightning strikes ignite multiple fires around Napa Valley; fanned by intense winds, the fires rapidly intensify into the LNU Fire Complex.

A cat named Louis requires major leg surgery, a Kunekune pig named Crumbfoot needs emergency X-rays, and Savannah heads out to conduct a wild horse study, looking at how horses treat their own parasites through a process known as Zoopharmacognosy.

A guinea pig named JT has a life-threatening tooth issue, a duck named Dick has a septic joint that needs cleaning, and Savannah and Dayle head to La Ronge, SK. to speak to a class of high schoolers and mentor the next generation of veterinarians.

Encounter kids' drawings on the walls in Pompeii that expose the city's violent gladiatorial past; check out a mythical sculpture unearthed by an Indian tsunami, a 12-century temple in quake-prone Mexico; a sunken ship in Utah's Great Salt Lake.

Catastrophe strikes a crucial allied air supply route in WWII as 15 planes never return; London's River Thames ices up so much, a fair is held on it; a mission to the Moon narrowly avoids disaster.

Examine a Revolutionary War-era ship found in the rubble of the World Trade Center. Uncover a mass grave of Viking settlers in Oxford, visit the resistance bunkers of the Warsaw Ghetto Uprising, and tour a necropolis full of burial jars in Corsica.

Guest comic Mircea Monroe.

Paid programming.

Triangle shaped hovering objects are seen by thousands of people and investigated by scientists and government officials, yet they could never be explained; the sightings occurred in a more than two year wave over Belgium, beginning in late 1989.

Caroline Aherne narrates as some of Britain's most opinionated viewers comment freely.

Wayne Brady, Ryan Stiles Colin Mochrie and guest performer Greg Proops are joined by star guest Kat Graham to put their comedic skills to the test through a series of spontaneous improv games.

A special episode featuring a compilation of games, moments, and outtakes of never-before-seen footage.

Sandi and Alan are joined by Jason Manford, Ahir Shah and Holly Walsh to look at veggies.

Sandi and Alan search for victory with Rob Beckett, Daliso Chaponda and Lara Ricote.

Will Kirk and Christina Trevanion take their mobile auction house on the road.

Caroline Aherne narrates as some of Britain's most opinionated viewers comment freely.

Alaskans are forced to embrace their inner warrior as winter deepens.

Examine a Revolutionary War-era ship found in the rubble of the World Trade Center. Uncover a mass grave of Viking settlers in Oxford, visit the resistance bunkers of the Warsaw Ghetto Uprising, and tour a necropolis full of burial jars in Corsica.

Scattered around the world are long-forgotten engineering marvels, decaying cities and empty factories that once stood on the cutting edge of design and construction. Today they are discarded, dangerous, and some of them are even deadly. "Mysteries of the Abandoned" reveals why these engineering triumphs were built and how they were left to crumble. In each hourlong episode, stories tell of who originally designed the structure, its historical significance, and why it was ultimately no longer viable. California's Goat Canyon Trestle railway, Pennsylvania's Kinzua Viaduct steel bridge, the Grand Goulets Road in the French Alps, and Hashima Island, a once thriving and now deserted Japanese island, are among episode subjects.

U.S. Navy veteran turned private investigator Jennifer Marshall and paranormal researcher Heidi Hollis investigate a series of mysterious encounters with an unknown creature in the Bluegrass hills of Kentucky.

The science behind some of the most incredible engineering accidents ever filmed is revealed; a look at the physics involved as well as forensic details to explain the slip-ups that turned construction into destruction.

Sign off.

U.S. Navy veteran turned private investigator Jennifer Marshall and paranormal researcher Heidi Hollis investigate a series of mysterious encounters with an unknown creature in the Bluegrass hills of Kentucky.

The science behind some of the most incredible engineering accidents ever filmed is revealed; a look at the physics involved as well as forensic details to explain the slip-ups that turned construction into destruction.

Alaskans are forced to embrace their inner warrior as winter deepens.

Encounter kids' drawings on the walls in Pompeii that expose the city's violent gladiatorial past; check out a mythical sculpture unearthed by an Indian tsunami, a 12-century temple in quake-prone Mexico; a sunken ship in Utah's Great Salt Lake.

U.S. Navy veteran turned private investigator Jennifer Marshall and paranormal researcher Heidi Hollis investigate a series of mysterious encounters with an unknown creature in the Bluegrass hills of Kentucky.

Catastrophe strikes a crucial allied air supply route in WWII as 15 planes never return; London's River Thames ices up so much, a fair is held on it; a mission to the Moon narrowly avoids disaster.

Budding entrepreneurs get three minutes to pitch their business ideas to five multimillionaires who are willing to invest their own cash to kick-start the businesses in the original "Shark Tank." After each pitch, the Dragons have the opportunity to ask questions about the venture. The entrepreneurs don't always have to answer, but of course what they choose not to address could very well affect the outcome. The pitch is over when each of the Dragons has declared,"I'm out." Evan Davis hosts.

An elderly dog named Layne needs tests to see if she's stable enough for surgery; a cow suffers from a prolapsed uterus; Lil shows up with a couple of creatures that need the team's help before they can be released back into the wild.

A cat named Lovebug requires emergency surgery after being shot in the leg; a Pomeranian named Cheeka has a bad cough; Savannah and Dayle take a trip to learn some horse-handling skills from a well-known Métis expert.

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 a mind-blowing old structure on a Maltese island.

In the jungles of southern Mexico, a rancher discovers dozens of skulls and bones on a cave floor; strange grass-covered domes are investigated in the Philippines; archaeologists uncover carved stone figures on the Hawaiian island of Kauai.

Soldiers encounter a luminous triangular-shaped craft in an English field; witnesses report a metallic object hovering over water.

A silent, orange football-shaped object is spotted over Loring Air Force Base in Maine; a Swedish farmer witnesses a crash into a lake.

Take your pick when Rick reveals the right, wrong, and totally impossible answers to the contestants; discover if any of these bright competitors have what it takes to weed out the wrong info and take a crack at the 10,000 pound jackpot.

A special episode featuring a compilation of games, moments and outtakes of never-before-seen footage.

Improv veterans Ryan Stiles, Wayne Brady and Colin Mochrie return for a new take on the comedy series with host, Aisha Tyler. Each episode, a special guest star joins the comics as they tackle a series of spontaneous improvised sketches, with only a few random ideas from the studio audience and their host. With little information and a lot of imagination, the comics depict a variety of characters and scenes, and even perform songs. At the end of each round, Aisha awards points to each of the four performers and announces a winner at the end of every episode.

When seen from above, the pyramids of Giza align with the stars; survivors of Katrina find rescue when least expected; a volcano burns bright blue; a forgotten beach reveals its secrets.

Tour a gun making company town in Connecticut and a Jersey Shore facility that revolutionized transatlantic communication; investigate a Colorado plain that was the site of a brutal labor battle, then check out a fairytale mansion in New Hampshire.

A massive typhoon in the Philippines; a record-breaking California wildfire; a submerged house; a lost snowboarder spends an icy night facing bears and deadly frostbite.

In the jungles of southern Mexico, a rancher discovers dozens of skulls and bones on a cave floor; strange grass-covered domes are investigated in the Philippines; archaeologists uncover carved stone figures on the Hawaiian island of Kauai.

Budding entrepreneurs get three minutes to pitch their business ideas to five multimillionaires who are willing to invest their own cash to kick-start the businesses in the original "Shark Tank." After each pitch, the Dragons have the opportunity to ask questions about the venture. The entrepreneurs don't always have to answer, but of course what they choose not to address could very well affect the outcome. The pitch is over when each of the Dragons has declared,"I'm out." Evan Davis hosts.

A special episode featuring a compilation of games, moments and outtakes of never-before-seen footage.

Improv veterans Ryan Stiles, Wayne Brady and Colin Mochrie return for a new take on the comedy series with host, Aisha Tyler. Each episode, a special guest star joins the comics as they tackle a series of spontaneous improvised sketches, with only a few random ideas from the studio audience and their host. With little information and a lot of imagination, the comics depict a variety of characters and scenes, and even perform songs. At the end of each round, Aisha awards points to each of the four performers and announces a winner at the end of every episode.

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 a mind-blowing old structure on a Maltese island.

The science behind some of the most incredible engineering accidents ever filmed is revealed; a look at the physics involved as well as forensic details to explain the slip-ups that turned construction into destruction.

Explore evidence that ties a meteor strike to a Biblical tale; delve into a treasure-filled tunnel revealed by a sinkhole in Mexico, a medieval cave shrine exposed during a UK landslide and famine warnings brought to light by a severe drought.

Rescuers aid a young girl trapped under rubble after a Turkish earthquake, all while a tsunami threatens to add to the turmoil; a father and daughter escape Oregon wildfires; a flash flood upstages an outdoor wedding.

The science behind some of the most incredible engineering accidents ever filmed is revealed; a look at the physics involved as well as forensic details to explain the slip-ups that turned construction into destruction.

Explore evidence that ties a meteor strike to a Biblical tale; delve into a treasure-filled tunnel revealed by a sinkhole in Mexico, a medieval cave shrine exposed during a UK landslide and famine warnings brought to light by a severe drought.

A special episode featuring a compilation of games, moments and outtakes of never-before-seen footage.

Improv veterans Ryan Stiles, Wayne Brady and Colin Mochrie return for a new take on the comedy series with host, Aisha Tyler. Each episode, a special guest star joins the comics as they tackle a series of spontaneous improvised sketches, with only a few random ideas from the studio audience and their host. With little information and a lot of imagination, the comics depict a variety of characters and scenes, and even perform songs. At the end of each round, Aisha awards points to each of the four performers and announces a winner at the end of every episode.

A massive typhoon in the Philippines; a record-breaking California wildfire; a submerged house; a lost snowboarder spends an icy night facing bears and deadly frostbite.

When seen from above, the pyramids of Giza align with the stars; survivors of Katrina find rescue when least expected; a volcano burns bright blue; a forgotten beach reveals its secrets.

In the jungles of southern Mexico, a rancher discovers dozens of skulls and bones on a cave floor; strange grass-covered domes are investigated in the Philippines; archaeologists uncover carved stone figures on the Hawaiian island of Kauai.

Soldiers encounter a luminous triangular-shaped craft in an English field; witnesses report a metallic object hovering over water.

A silent, orange football-shaped object is spotted over Loring Air Force Base in Maine; a Swedish farmer witnesses a crash into a lake.

Budding entrepreneurs get three minutes to pitch their business ideas to five multimillionaires who are willing to invest their own cash to kick-start the businesses in the original "Shark Tank." After each pitch, the Dragons have the opportunity to ask questions about the venture. The entrepreneurs don't always have to answer, but of course what they choose not to address could very well affect the outcome. The pitch is over when each of the Dragons has declared,"I'm out." Evan Davis hosts.

Getting ready to say goodbye to a group of contestants, who are primed and ready for their last shot at taking home the 10,000 pounds; checking who wins the day and all those shiny coins packed into the giant exclamation point.

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.

The origins of a colossal image of a man carved into the red sands of Central Australia; mysterious mummies and peculiar whale bones resting in two different parts of Chile's Atacama Desert; a lost Egyptian tomb.

Puzzle over an out-of-place relic from World War II and get a bird's-eye view of stone circles in Norway; examine mysterious, ancient mounds on the banks of the Mississippi and uncover the dark history of a medieval English village.

Getting ready to say goodbye to a group of contestants, who are primed and ready for their last shot at taking home the 10,000 pounds; checking who wins the day and all those shiny coins packed into the giant exclamation point.

Improv veterans Ryan Stiles, Wayne Brady and Colin Mochrie return for a new take on the comedy series with host, Aisha Tyler. Each episode, a special guest star joins the comics as they tackle a series of spontaneous improvised sketches, with only a few random ideas from the studio audience and their host. With little information and a lot of imagination, the comics depict a variety of characters and scenes, and even perform songs. At the end of each round, Aisha awards points to each of the four performers and announces a winner at the end of every episode.

Guest comic Jeff Davis.

Strange aquatic mammals populating a river in Columbia; a ship marooned in a sea of sand along Namibia's notorious Skeleton Coast; a Boeing 727 jetliner hidden in a pine forest; an unusual pattern is discovered in the Nevada desert.

Explore a Louisiana military base that helped save the world, then descend into a basement filled with Prohibition-era secrets; look around a bizarre castle in the Colorado mountains and a ruined Pennsylvania resort that was a Union stronghold.

Reviewing footage of an underground volcanic eruption in Tonga and the tsunami it triggers; mapping the path of destruction left by a giant tornado in the U.S. South; fierce storms in Europe.

The origins of a colossal image of a man carved into the red sands of Central Australia; mysterious mummies and peculiar whale bones resting in two different parts of Chile's Atacama Desert; a lost Egyptian tomb.

Budding entrepreneurs get three minutes to pitch their business ideas to five multimillionaires who are willing to invest their own cash to kick-start the businesses in the original "Shark Tank." After each pitch, the Dragons have the opportunity to ask questions about the venture. The entrepreneurs don't always have to answer, but of course what they choose not to address could very well affect the outcome. The pitch is over when each of the Dragons has declared,"I'm out." Evan Davis hosts.

Improv veterans Ryan Stiles, Wayne Brady and Colin Mochrie return for a new take on the comedy series with host, Aisha Tyler. Each episode, a special guest star joins the comics as they tackle a series of spontaneous improvised sketches, with only a few random ideas from the studio audience and their host. With little information and a lot of imagination, the comics depict a variety of characters and scenes, and even perform songs. At the end of each round, Aisha awards points to each of the four performers and announces a winner at the end of every episode.

Guest comic Jeff Davis.

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.

A missing cat named Dr. Pepper comes back with serious injuries; an owl found on the side of the road may have a broken wing; Dr. Poitras and her staff take precautions with a growling rottweiler named Kid who needs treatment around his face.

Aisling Bea, Urzila Carlson, and Romesh Ranganathan compete in this upside-down episode.

Sandi Toksvig is joined by Nabil Abdulrashid, Bill Bailey, Victoria Coren Mitchell and Alan Davies.

Gyles Brandreth, Judi Love and Kiri Pritchard-McLean.

Alaskans soldier through the heart of dark winter in pursuit of the resources they desperately need for survival.

A missing cat named Dr. Pepper comes back with serious injuries; an owl found on the side of the road may have a broken wing; Dr. Poitras and her staff take precautions with a growling rottweiler named Kid who needs treatment around his face.

Sandi Toksvig puts the UK-US special relationship under the microscope with Kemah Bob, Alex Edelman, David Mitchell, and Alan Davies.

Sandi Toksvig is joined by Nabil Abdulrashid, Bill Bailey, Victoria Coren Mitchell and Alan Davies.

Gyles Brandreth, Judi Love and Kiri Pritchard-McLean.

Improv veterans Ryan Stiles, Wayne Brady and Colin Mochrie return for a new take on the comedy series with host, Aisha Tyler. Each episode, a special guest star joins the comics as they tackle a series of spontaneous improvised sketches, with only a few random ideas from the studio audience and their host. With little information and a lot of imagination, the comics depict a variety of characters and scenes, and even perform songs. At the end of each round, Aisha awards points to each of the four performers and announces a winner at the end of every episode.

Guest comic Jeff Davis.

Reviewing footage of an underground volcanic eruption in Tonga and the tsunami it triggers; mapping the path of destruction left by a giant tornado in the U.S. South; fierce storms in Europe.

Strange aquatic mammals populating a river in Columbia; a ship marooned in a sea of sand along Namibia's notorious Skeleton Coast; a Boeing 727 jetliner hidden in a pine forest; an unusual pattern is discovered in the Nevada desert.

The origins of a colossal image of a man carved into the red sands of Central Australia; mysterious mummies and peculiar whale bones resting in two different parts of Chile's Atacama Desert; a lost Egyptian tomb.

Puzzle over an out-of-place relic from World War II and get a bird's-eye view of stone circles in Norway; examine mysterious, ancient mounds on the banks of the Mississippi and uncover the dark history of a medieval English village.

Budding entrepreneurs get three minutes to pitch their business ideas to five multimillionaires who are willing to invest their own cash to kick-start the businesses in the original "Shark Tank." After each pitch, the Dragons have the opportunity to ask questions about the venture. The entrepreneurs don't always have to answer, but of course what they choose not to address could very well affect the outcome. The pitch is over when each of the Dragons has declared,"I'm out." Evan Davis hosts.

On Aug. 4, 2020, Hurricane Isaias slams into the North Carolina coast before tracking northward, spawning 37 tornadoes in eight states and causing catastrophic flooding in Pennsylvania.

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

A medical-school dropout tries to hide his attraction to his new friend, a bubbly artist who already has a boyfriend.

Contestants compete across the series, scoring points by answering questions correctly; they must avoid the impossible answers, otherwise they will be eliminated until the next day.

Guest comic Jordin Sparks.

Guest comic Chris Lee.

Tripper is the head counselor at a budget summer camp called Camp Northstar. In truth, he's young at heart and only marginally more mature than the campers themselves. Tripper befriends Rudy, a loner camper who has trouble fitting in. As Tripper inspires his young charges to defeat rival Camp Mohawk in the annual Olympiad competition, Rudy plays matchmaker between Tripper and Roxanne, a female counselor at Northstar.

Hurricane Ida's rapid flooding traps people in their cars; a couple escapes a California inferno; a British adventurer outsmarts hungry wolves after being buried alive by an Arctic blizzard.

Discover 10 preserved Byzantine-era crocodiles on the banks of the Nile; untangle the puzzle of the Namib Desert's grass circles; locate the remnants of a lost foreign-ruled city in Egypt and solve the riddle of Peru's Band of Holes.

Budding entrepreneurs get three minutes to pitch their business ideas to five multimillionaires who are willing to invest their own cash to kick-start the businesses in the original "Shark Tank." After each pitch, the Dragons have the opportunity to ask questions about the venture. The entrepreneurs don't always have to answer, but of course what they choose not to address could very well affect the outcome. The pitch is over when each of the Dragons has declared,"I'm out." Evan Davis hosts.

Guest comic Jordin Sparks.

Guest comic Chris Lee.

Tripper is the head counselor at a budget summer camp called Camp Northstar. In truth, he's young at heart and only marginally more mature than the campers themselves. Tripper befriends Rudy, a loner camper who has trouble fitting in. As Tripper inspires his young charges to defeat rival Camp Mohawk in the annual Olympiad competition, Rudy plays matchmaker between Tripper and Roxanne, a female counselor at Northstar.

Dig beneath the Treasury in Petra, Jordan, to find a sealed tomb containing 12 skeletons. Unearth a hoard of coins hidden during a Scottish massacre, question the purpose of an empty grave in Peru, and inspect a Bronze Age leader's coffin in England.

Though a misfit among his brainy family members, Massachusetts bouncer Doug Glatt has a knockout punch that lands him a spot on a minor-league Canadian hockey team.

Dig beneath the Treasury in Petra, Jordan, to find a sealed tomb containing 12 skeletons. Unearth a hoard of coins hidden during a Scottish massacre, question the purpose of an empty grave in Peru, and inspect a Bronze Age leader's coffin in England.

Guest comic Jordin Sparks.

Guest comic Chris Lee.

Hurricane Ida's rapid flooding traps people in their cars; a couple escapes a California inferno; a British adventurer outsmarts hungry wolves after being buried alive by an Arctic blizzard.

An enormous fiery vortex in Redding, Calif.; the island nation of Malta loses a natural treasure; a mysterious radioactive hotspot is discovered near Chernobyl; an unknown force lays waste to a mountain forest in Italian Alps.

Discover 10 preserved Byzantine-era crocodiles on the banks of the Nile; untangle the puzzle of the Namib Desert's grass circles; locate the remnants of a lost foreign-ruled city in Egypt and solve the riddle of Peru's Band of Holes.

On a September morning in 1994, students at a Zimbabwe school witness a silver craft land in a nearby field; numerous adults corroborate the UFO sighting, but the children are silenced; many maintain their account of the incident is true.

Budding entrepreneurs get three minutes to pitch their business ideas to five multimillionaires who are willing to invest their own cash to kick-start the businesses in the original "Shark Tank." After each pitch, the Dragons have the opportunity to ask questions about the venture. The entrepreneurs don't always have to answer, but of course what they choose not to address could very well affect the outcome. The pitch is over when each of the Dragons has declared,"I'm out." Evan Davis hosts.

Caroline Aherne narrates as some of Britain's most opinionated viewers comment freely.

Encounter abandoned pods that may have been designed by alien architects; explore a mysterious concrete channel in Bosnia; weave through a complex of odd shapes in Greenland; meet the mythical guardian of a Vietnamese building.

Investigating an odd phenomenon that makes rocks slide across Death Valley; learning how pieces of jade rewrite Chinese history; examining animal bones that could show an earlier human arrival in the Americas; visiting Earth's oldest stone circle.

A 10,000-gallon water tank is found to be empty after an object is spotted hovering over it; amaranth plants wilt after a saucer-shaped craft hovers above them.

A policeman discovers an oval-shaped object without windows or doors; a woman spots an aura of light surrounding a small tree.

Separate the right from the wrong, then try to figure out what's downright impossible; follow a horde of keen players as they vie for glory and a chance to unlock 10,000 pounds trapped inside the giant exclamation mark on stage.

Guest comic Greg Proops.

Games include: Questions, Doo Wop, Dubbing, Scenes from a hat, Helping hands.

A long-forgotten network of Native American earthworks; a baffling battlefield mystery in Belgium; a mysterious blood-red lake on a remote Greek island; an eerie pink glow emulating from the middle of the Pacific Ocean.

Scattered across the United States are abandoned structures, forgotten ruins of the past and monuments to a bygone era that reveal the secrets of a hidden America.

House-decimating floods in British Columbia; speeding away from a lethal cliff collapse with boaters vacationing in Brazil; two men ditch their car during a hurricane; an Oregon farm razed by a wildfire.

Investigating an odd phenomenon that makes rocks slide across Death Valley; learning how pieces of jade rewrite Chinese history; examining animal bones that could show an earlier human arrival in the Americas; visiting Earth's oldest stone circle.

Budding entrepreneurs get three minutes to pitch their business ideas to five multimillionaires who are willing to invest their own cash to kick-start the businesses in the original "Shark Tank." After each pitch, the Dragons have the opportunity to ask questions about the venture. The entrepreneurs don't always have to answer, but of course what they choose not to address could very well affect the outcome. The pitch is over when each of the Dragons has declared,"I'm out." Evan Davis hosts.

Guest comic Greg Proops.

Games include: Questions, Doo Wop, Dubbing, Scenes from a hat, Helping hands.

Encounter abandoned pods that may have been designed by alien architects; explore a mysterious concrete channel in Bosnia; weave through a complex of odd shapes in Greenland; meet the mythical guardian of a Vietnamese building.

Mysterious industrial waste and abandoned homes in an uninhabited part of Greenland; strange ditches and mounds deep within the Arctic Circle; a huge pyramid on the Kazakh steppe; a ball of golden fur in Yukon's gold fields.

In Guatemala, archaeologists identify an ancient site containing a series of unknown structures; a lake full of jellyfish is studied on a remote South Pacific island; Argentinian researchers discover a complex that may have a dark past.

Experts uncover four global stories of extraordinary curiosities that were once concealed in the deserts of the planet.

Mysterious industrial waste and abandoned homes in an uninhabited part of Greenland; strange ditches and mounds deep within the Arctic Circle; a huge pyramid on the Kazakh steppe; a ball of golden fur in Yukon's gold fields.

In Guatemala, archaeologists identify an ancient site containing a series of unknown structures; a lake full of jellyfish is studied on a remote South Pacific island; Argentinian researchers discover a complex that may have a dark past.

Guest comic Greg Proops.

Games include: Questions, Doo Wop, Dubbing, Scenes from a hat, Helping hands.

House-decimating floods in British Columbia; speeding away from a lethal cliff collapse with boaters vacationing in Brazil; two men ditch their car during a hurricane; an Oregon farm razed by a wildfire.

A long-forgotten network of Native American earthworks; a baffling battlefield mystery in Belgium; a mysterious blood-red lake on a remote Greek island; an eerie pink glow emulating from the middle of the Pacific Ocean.

The ancient necropolis of Abusir contains strange megastructures unlike any discovered in Egypt; experts gain rare access to investigate lost tombs and forgotten rituals to reveal the secrets of Egypt's Sun Cult pharaohs.

A 10,000-gallon water tank is found to be empty after an object is spotted hovering over it; amaranth plants wilt after a saucer-shaped craft hovers above them.

A policeman discovers an oval-shaped object without windows or doors; a woman spots an aura of light surrounding a small tree.

Budding entrepreneurs get three minutes to pitch their business ideas to five multimillionaires who are willing to invest their own cash to kick-start the businesses in the original "Shark Tank." After each pitch, the Dragons have the opportunity to ask questions about the venture. The entrepreneurs don't always have to answer, but of course what they choose not to address could very well affect the outcome. The pitch is over when each of the Dragons has declared,"I'm out." Evan Davis hosts.

Getting ready to say goodbye to a group of contestants, who are primed and ready for their last shot at taking home the 10,000 pounds; checking who wins the day and all those shiny coins packed into the giant exclamation point.

A vanished Neolithic structure in an Irish farmer's field, an ancient oasis in the remote reaches of a Chinese desert, a centuries-old buried treasure in the U.K. and a dreaded predator in the Pacific Ocean are discovered by accident using drones.

Connecting the Great Pyramid to an archeological find near the Suez Canal; unveiling the secrets of colossal rock sculptures in Saudi Arabia; a mystical geological formation deep in the Sahara; unmasking a 37-million-year-old Egyptian enigma.

A daring escape by two contestants leaves the specialist hunters puzzled and desperate to make a break through contacts.

Pay attention as Rick reveals a fresh slate of answers, some of which can't possibly be right; see who gets eliminated and whose smart selections win them a place in the final round and a chance at the juicy 10,000-pound prize.

Improv veterans Ryan Stiles, Wayne Brady and Colin Mochrie return for a new take on the comedy series with host, Aisha Tyler. Each episode, a special guest star joins the comics as they tackle a series of spontaneous improvised sketches, with only a few random ideas from the studio audience and their host. With little information and a lot of imagination, the comics depict a variety of characters and scenes, and even perform songs. At the end of each round, Aisha awards points to each of the four performers and announces a winner at the end of every episode.

Guest comic Jeff Davis.

Dive into the historical and natural secrets of the deep; explore an uninhabited concrete island, ocean spirals off the Australian coast, underwater evidence of a violent past and tracks thousands of metres below the sea's surface.

The origins of a colossal image of a man carved into the red sands of Central Australia; mysterious mummies and peculiar whale bones resting in two different parts of Chile's Atacama Desert; a lost Egyptian tomb.

A tornado tears a mile-wide path through the American town of Moore, Okla., destroying two schools while the pupils are inside.

Connecting the Great Pyramid to an archeological find near the Suez Canal; unveiling the secrets of colossal rock sculptures in Saudi Arabia; a mystical geological formation deep in the Sahara; unmasking a 37-million-year-old Egyptian enigma.

Budding entrepreneurs get three minutes to pitch their business ideas to five multimillionaires who are willing to invest their own cash to kick-start the businesses in the original "Shark Tank." After each pitch, the Dragons have the opportunity to ask questions about the venture. The entrepreneurs don't always have to answer, but of course what they choose not to address could very well affect the outcome. The pitch is over when each of the Dragons has declared,"I'm out." Evan Davis hosts.

A special episode featuring a compilation of games, moments and outtakes of never-before-seen footage.

Improv veterans Ryan Stiles, Wayne Brady and Colin Mochrie return for a new take on the comedy series with host, Aisha Tyler. Each episode, a special guest star joins the comics as they tackle a series of spontaneous improvised sketches, with only a few random ideas from the studio audience and their host. With little information and a lot of imagination, the comics depict a variety of characters and scenes, and even perform songs. At the end of each round, Aisha awards points to each of the four performers and announces a winner at the end of every episode.

A vanished Neolithic structure in an Irish farmer's field, an ancient oasis in the remote reaches of a Chinese desert, a centuries-old buried treasure in the U.K. and a dreaded predator in the Pacific Ocean are discovered by accident using drones.

Celebrity guests discuss their current projects and the latest gossip hitting newsstands.

Caroline Aherne narrates as some of Britain's most opinionated viewers comment freely.

Guest comic Keegan-Michael Key.

Guest comedian Rachel Bloom.

Celebrity guests discuss their current projects and the latest gossip hitting newsstands.

Caroline Aherne narrates as some of Britain's most opinionated viewers comment freely.

Guest comic Keegan-Michael Key.

Guest comedian Rachel Bloom.

A tornado tears a mile-wide path through the American town of Moore, Okla., destroying two schools while the pupils are inside.

Dive into the historical and natural secrets of the deep; explore an uninhabited concrete island, ocean spirals off the Australian coast, underwater evidence of a violent past and tracks thousands of metres below the sea's surface.

Dig beneath the Treasury in Petra, Jordan, to find a sealed tomb containing 12 skeletons. Unearth a hoard of coins hidden during a Scottish massacre, question the purpose of an empty grave in Peru, and inspect a Bronze Age leader's coffin in England.

Flammable snow could be an international danger; black smoke with a mind of its own; a giant red dome that appears to defy the laws of physics.

Along the coastline, Zac and Darin take a deep dive into the coral reef restoration techniques supporting a vast underwater ecosystem.

Explore evidence that ties a meteor strike to a Biblical tale; delve into a treasure-filled tunnel revealed by a sinkhole in Mexico, a medieval cave shrine exposed during a UK landslide and famine warnings brought to light by a severe drought.

The science behind some of the most incredible engineering accidents ever filmed is revealed; a look at the physics involved as well as forensic details to explain the slip-ups that turned construction into destruction.

Mysterious industrial waste and abandoned homes in an uninhabited part of Greenland; strange ditches and mounds deep within the Arctic Circle; a huge pyramid on the Kazakh steppe; a ball of golden fur in Yukon's gold fields.

Budding entrepreneurs get three minutes to pitch their business ideas to five multimillionaires who are willing to invest their own cash to kick-start the businesses in the original "Shark Tank." After each pitch, the Dragons have the opportunity to ask questions about the venture. The entrepreneurs don't always have to answer, but of course what they choose not to address could very well affect the outcome. The pitch is over when each of the Dragons has declared,"I'm out." Evan Davis hosts.

Guest comic Jordin Sparks.

Paid programming.

Rescuers aid a young girl trapped under rubble after a Turkish earthquake, all while a tsunami threatens to add to the turmoil; a father and daughter escape Oregon wildfires; a flash flood upstages an outdoor wedding.

Dig beneath the Treasury in Petra, Jordan, to find a sealed tomb containing 12 skeletons. Unearth a hoard of coins hidden during a Scottish massacre, question the purpose of an empty grave in Peru, and inspect a Bronze Age leader's coffin in England.

Celebrity guests discuss their current projects and the latest gossip hitting newsstands.

Caroline Aherne narrates as some of Britain's most opinionated viewers comment freely.

Aisling Bea, Urzila Carlson, and Romesh Ranganathan compete in this upside-down episode.

Sandi Toksvig puts the UK-US special relationship under the microscope with Kemah Bob, Alex Edelman, David Mitchell, and Alan Davies.

Budding entrepreneurs get three minutes to pitch their business ideas to five multimillionaires who are willing to invest their own cash to kick-start the businesses in the original "Shark Tank." After each pitch, the Dragons have the opportunity to ask questions about the venture. The entrepreneurs don't always have to answer, but of course what they choose not to address could very well affect the outcome. The pitch is over when each of the Dragons has declared,"I'm out." Evan Davis hosts.

Take your pick when Rick reveals the right, wrong, and totally impossible answers to the contestants; discover if any of these bright competitors have what it takes to weed out the wrong info and take a crack at the 10,000 pound jackpot.

Aisling Bea, Urzila Carlson, and Romesh Ranganathan compete in this upside-down episode.

Sandi Toksvig puts the UK-US special relationship under the microscope with Kemah Bob, Alex Edelman, David Mitchell, and Alan Davies.

Dig beneath the Treasury in Petra, Jordan, to find a sealed tomb containing 12 skeletons. Unearth a hoard of coins hidden during a Scottish massacre, question the purpose of an empty grave in Peru, and inspect a Bronze Age leader's coffin in England.

For many years, Heather Mason (Adelaide Clemens) and her father, Harry (Sean Bean), have been on the run from dangerous forces she does not understand. Heather continues to be plagued by terrifying nightmares and frightened by her father's disappearance, and on the eve of her 18th birthday, she discovers that she is not who she thinks she is. The revelation leads her deep into the demonic world of Silent Hill, where she may become trapped forever.

Three men vanish from a remote Scottish lighthouse; dozens of mines explode simultaneously during the Vietnam War, for no apparent reason; ten billion snow crabs disappear from the Bering Sea.

Mysterious industrial waste and abandoned homes in an uninhabited part of Greenland; strange ditches and mounds deep within the Arctic Circle; a huge pyramid on the Kazakh steppe; a ball of golden fur in Yukon's gold fields.

Dig beneath the Treasury in Petra, Jordan, to find a sealed tomb containing 12 skeletons. Unearth a hoard of coins hidden during a Scottish massacre, question the purpose of an empty grave in Peru, and inspect a Bronze Age leader's coffin in England.

Explore evidence that ties a meteor strike to a Biblical tale; delve into a treasure-filled tunnel revealed by a sinkhole in Mexico, a medieval cave shrine exposed during a UK landslide and famine warnings brought to light by a severe drought.

Three men vanish from a remote Scottish lighthouse; dozens of mines explode simultaneously during the Vietnam War, for no apparent reason; ten billion snow crabs disappear from the Bering Sea.

The science behind some of the most incredible engineering accidents ever filmed is revealed; a look at the physics involved as well as forensic details to explain the slip-ups that turned construction into destruction.

Budding entrepreneurs get three minutes to pitch their business ideas to five multimillionaires who are willing to invest their own cash to kick-start the businesses in the original "Shark Tank." After each pitch, the Dragons have the opportunity to ask questions about the venture. The entrepreneurs don't always have to answer, but of course what they choose not to address could very well affect the outcome. The pitch is over when each of the Dragons has declared,"I'm out." Evan Davis hosts.

On Aug. 4, 2020, Hurricane Isaias slams into the North Carolina coast before tracking northward, spawning 37 tornadoes in eight states and causing catastrophic flooding in Pennsylvania.

Brooke demonstrates the ever-important job of vet techs as she helps a dog named Charlie who was injured in a dogfight; Dr. Savannah treats a dog who was kicked by a horse; Brooke and Savannah then head over to a spay and neuter clinic in Sturgeon Lake.

A farm dog named Wrangler was run over by a tractor; a foal named Missy ripped her eyelid on a barbed wire fence; Savannah heads to the Enoch Cree Nation to run an emergency Parvo clinic.

Explore evidence that ties a meteor strike to a Biblical tale; delve into a treasure-filled tunnel revealed by a sinkhole in Mexico, a medieval cave shrine exposed during a UK landslide and famine warnings brought to light by a severe drought.

Rescuers aid a young girl trapped under rubble after a Turkish earthquake, all while a tsunami threatens to add to the turmoil; a father and daughter escape Oregon wildfires; a flash flood upstages an outdoor wedding.

Dig beneath the Treasury in Petra, Jordan, to find a sealed tomb containing 12 skeletons. Unearth a hoard of coins hidden during a Scottish massacre, question the purpose of an empty grave in Peru, and inspect a Bronze Age leader's coffin in England.

Guest comic Chris Lee.

Paid programming.

On a September morning in 1994, students at a Zimbabwe school witness a silver craft land in a nearby field; numerous adults corroborate the UFO sighting, but the children are silenced; many maintain their account of the incident is true.

Caroline Aherne narrates as some of Britain's most opinionated viewers comment freely.

Guest comic Greg Proops.

Games include: Questions, Doo Wop, Dubbing, Scenes from a hat, Helping hands.

Sandi Toksvig is joined by Nabil Abdulrashid, Bill Bailey, Victoria Coren Mitchell and Alan Davies.

Gyles Brandreth, Judi Love and Kiri Pritchard-McLean.

Will Kirk and Christina Trevanion take their mobile auction house on the road.

Caroline Aherne narrates as some of Britain's most opinionated viewers comment freely.

Alaskans soldier through the heart of dark winter in pursuit of the resources they desperately need for survival.

Dig beneath the Treasury in Petra, Jordan, to find a sealed tomb containing 12 skeletons. Unearth a hoard of coins hidden during a Scottish massacre, question the purpose of an empty grave in Peru, and inspect a Bronze Age leader's coffin in England.

Scattered around the world are long-forgotten engineering marvels, decaying cities and empty factories that once stood on the cutting edge of design and construction. Today they are discarded, dangerous, and some of them are even deadly. "Mysteries of the Abandoned" reveals why these engineering triumphs were built and how they were left to crumble. In each hourlong episode, stories tell of who originally designed the structure, its historical significance, and why it was ultimately no longer viable. California's Goat Canyon Trestle railway, Pennsylvania's Kinzua Viaduct steel bridge, the Grand Goulets Road in the French Alps, and Hashima Island, a once thriving and now deserted Japanese island, are among episode subjects.

Private investigator Jennifer Marshall and paranormal investigator Heather Taddy travel to Dulce, N.M., to look into reports that a secret underground alien facility exists under Archuleta Mesa - also known as Alien Mountain.

Explore evidence that ties a meteor strike to a Biblical tale; delve into a treasure-filled tunnel revealed by a sinkhole in Mexico, a medieval cave shrine exposed during a UK landslide and famine warnings brought to light by a severe drought.

Sign off.

Private investigator Jennifer Marshall and paranormal investigator Heather Taddy travel to Dulce, N.M., to look into reports that a secret underground alien facility exists under Archuleta Mesa - also known as Alien Mountain.

The science behind some of the most incredible engineering accidents ever filmed is revealed; a look at the physics involved as well as forensic details to explain the slip-ups that turned construction into destruction.

Alaskans soldier through the heart of dark winter in pursuit of the resources they desperately need for survival.

Explore evidence that ties a meteor strike to a Biblical tale; delve into a treasure-filled tunnel revealed by a sinkhole in Mexico, a medieval cave shrine exposed during a UK landslide and famine warnings brought to light by a severe drought.

Private investigator Jennifer Marshall and paranormal investigator Heather Taddy travel to Dulce, N.M., to look into reports that a secret underground alien facility exists under Archuleta Mesa - also known as Alien Mountain.

Three men vanish from a remote Scottish lighthouse; dozens of mines explode simultaneously during the Vietnam War, for no apparent reason; ten billion snow crabs disappear from the Bering Sea.

Budding entrepreneurs get three minutes to pitch their business ideas to five multimillionaires who are willing to invest their own cash to kick-start the businesses in the original "Shark Tank." After each pitch, the Dragons have the opportunity to ask questions about the venture. The entrepreneurs don't always have to answer, but of course what they choose not to address could very well affect the outcome. The pitch is over when each of the Dragons has declared,"I'm out." Evan Davis hosts.

Dr. Dayle treats an adorable mini pony named Daisy who's got a strange growth on her face and helps a mama cow during a difficult calving; Savannah must work to diagnose a dog named Bernadette who has stopped eating due to chronic pain.

A housecat named Smoky is at risk of diabetes and a barn cat named Ashes is in rough shape after being hit by a car; Savannah heads out with the Canadian Animal Task Force to round up, spay/neuter, and release dozens of feral cats from a village.

Unlock military secrets from the air; spot a Nazi weapon designed to turn the tides of war in France; a covert Russian military tower in Chernobyl's shadow; a rumoured nuclear lab buried in Australia; a hush-hush surprise underneath Alcatraz.

Travel to Cairo to examine a stunning find under the Pyramid of Unas' watchful eye. Search for a 16th-century Portuguese shipwreck in the Namib Desert, unearth a WW II plane that crashed in the Sahara, and study a fossilized missing link in Taiwan.

A man observes a saucer-shaped object in a lagoon; an unusual light in a field causes the driver to veer off the road.

A star lands in France, emitting solid beams of light; Belgian police officers follow a triangular craft that shoots out that are red balls of light.

Pick through a dizzying array of questions and answers as Rick tries to separate the winners from the rest of the pack; cheer as one lucky contestant gets a chance to unleash a spectacular torrent of 10,000 one-pound coins.

Guest comic Mark Ballas.

Guest comic Gary Anthony Williams.

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.

Discover 10 preserved Byzantine-era crocodiles on the banks of the Nile; untangle the puzzle of the Namib Desert's grass circles; locate the remnants of a lost foreign-ruled city in Egypt and solve the riddle of Peru's Band of Holes.

A holiday cruise ship sails into a hurricane, terrifying 4,000 passengers as their cabins are plunged underwater.

Travel to Cairo to examine a stunning find under the Pyramid of Unas' watchful eye. Search for a 16th-century Portuguese shipwreck in the Namib Desert, unearth a WW II plane that crashed in the Sahara, and study a fossilized missing link in Taiwan.

Budding entrepreneurs get three minutes to pitch their business ideas to five multimillionaires who are willing to invest their own cash to kick-start the businesses in the original "Shark Tank." After each pitch, the Dragons have the opportunity to ask questions about the venture. The entrepreneurs don't always have to answer, but of course what they choose not to address could very well affect the outcome. The pitch is over when each of the Dragons has declared,"I'm out." Evan Davis hosts.

Guest comic Mark Ballas.

Guest comic Gary Anthony Williams.

Unlock military secrets from the air; spot a Nazi weapon designed to turn the tides of war in France; a covert Russian military tower in Chernobyl's shadow; a rumoured nuclear lab buried in Australia; a hush-hush surprise underneath Alcatraz.

The science behind some of the most incredible engineering accidents ever filmed is revealed; a look at the physics involved as well as forensic details to explain the slip-ups that turned construction into destruction.

Encounter kids' drawings on the walls in Pompeii that expose the city's violent gladiatorial past; check out a mythical sculpture unearthed by an Indian tsunami, a 12-century temple in quake-prone Mexico; a sunken ship in Utah's Great Salt Lake.

Molten lava devours homes and lives when a volcano erupts on La Palma; an entire U.S. town submerged by endless downpours; colossal ice boulders in Italy.

The science behind some of the most incredible engineering accidents ever filmed is revealed; a look at the physics involved as well as forensic details to explain the slip-ups that turned construction into destruction.

Encounter kids' drawings on the walls in Pompeii that expose the city's violent gladiatorial past; check out a mythical sculpture unearthed by an Indian tsunami, a 12-century temple in quake-prone Mexico; a sunken ship in Utah's Great Salt Lake.

Guest comic Mark Ballas.

Guest comic Gary Anthony Williams.

A holiday cruise ship sails into a hurricane, terrifying 4,000 passengers as their cabins are plunged underwater.

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.

Travel to Cairo to examine a stunning find under the Pyramid of Unas' watchful eye. Search for a 16th-century Portuguese shipwreck in the Namib Desert, unearth a WW II plane that crashed in the Sahara, and study a fossilized missing link in Taiwan.

A man observes a saucer-shaped object in a lagoon; an unusual light in a field causes the driver to veer off the road.

A star lands in France, emitting solid beams of light; Belgian police officers follow a triangular craft that shoots out that are red balls of light.

Budding entrepreneurs get three minutes to pitch their business ideas to five multimillionaires who are willing to invest their own cash to kick-start the businesses in the original "Shark Tank." After each pitch, the Dragons have the opportunity to ask questions about the venture. The entrepreneurs don't always have to answer, but of course what they choose not to address could very well affect the outcome. The pitch is over when each of the Dragons has declared,"I'm out." Evan Davis hosts.

Rick reveals the right, wrong and totally impossible answers to the contestants; discovering who has what it takes to weed out the wrong info and take a crack at the 10,000-pound jackpot.

Over a hundred big concrete arrows scattered across the U.S.; a giant chalk figure with an oversized phallus on an English hillside; a mysterious hole in the middle of a lake in Southern California.

Ancient human remains believed to belong to a great hunter are discovered in the Peruvian highlands. In Tunisia, the ruins of a legendary lost Roman city may have finally been found. Strange sounds emanating from sand dunes in the Mongolian desert are investigated. A huge collection of human and animal bones is discovered in a cave in Saudi Arabia.

Parting the waters using satellite imagery to see what lies beneath; discovering a lost-lost Turkish basilica, a church spire amid toxic sludge in Romania, a ship hull in the North Sea, a shocking underwater find that rivals the Great Barrier Reef.

The players try to tease out which of Rick's answers are not just wrong but actually impossible; three tense rounds and seeing who is left standing to face the 10,000-pound exclamation point.

Guest comic Tiffany Coyne.

Guest comic Tiffany Haddish.

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.

Investigating an odd phenomenon that makes rocks slide across Death Valley; learning how pieces of jade rewrite Chinese history; examining animal bones that could show an earlier human arrival in the Americas; visiting Earth's oldest stone circle.

Hurricane Patricia rips apart a Mexican holiday resort sending tourists fleeing for their lives.

Ancient human remains believed to belong to a great hunter are discovered in the Peruvian highlands. In Tunisia, the ruins of a legendary lost Roman city may have finally been found. Strange sounds emanating from sand dunes in the Mongolian desert are investigated. A huge collection of human and animal bones is discovered in a cave in Saudi Arabia.

Budding entrepreneurs get three minutes to pitch their business ideas to five multimillionaires who are willing to invest their own cash to kick-start the businesses in the original "Shark Tank." After each pitch, the Dragons have the opportunity to ask questions about the venture. The entrepreneurs don't always have to answer, but of course what they choose not to address could very well affect the outcome. The pitch is over when each of the Dragons has declared,"I'm out." Evan Davis hosts.

Guest comic Tiffany Coyne.

Guest comic Tiffany Haddish.

Over a hundred big concrete arrows scattered across the U.S.; a giant chalk figure with an oversized phallus on an English hillside; a mysterious hole in the middle of a lake in Southern California.