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A team of archaeologists researches the "desert kites," the stone megastructures across northern Saudi Arabia and southern Jordan.

The history of unique American horse breeds, including the mustang, Appaloosa, Morgan and quarter horse, that helped shape the nation and the people who continue the tradition of caring for them.

Whether foreign war tourists took part in Bosnian War atrocities; life on the border with Russia; turning small town bakeries into dance floors.

Margaret Hoover leads interviews and debates.

Science, health, technology and environment experts and professionals address issues such as artificial intelligence, medicine and climate science.

Movements to enhance strength and coordination.

Basketball; the Neighbors prepare to celebrate the arrival of the comet.

Lyla and her family must figure out a way to get Stu back home when he gets lost delivering cookies.

Arugula and Carl go on an adventure as archaeologists; Carl spots a UFO on Mother's Day.

Chrissie encourages Daniel to ride a horse; Margaret gets scared when fireflies crash the family picnic.

Phoebe learns what privacy signs are and how to use them to communicate to neighbors; Jay gets nervous about getting a haircut.

Papa Bear wants to teach Baby Bear Tee ball, but Baby Bear would rather prefer to draw the ball than hit it.

The Squad uses math and engineering skills to fix scooters after they mysteriously break; Jackie tests her new fixing skills on a broken family heirloom.

The brothers are trapped when their submarine loses power.

A panel of journalists provides reporting and analysis of the major stories emanating from the United States capital.

Margaret Hoover leads interviews and debates.

Social, political and economic trends of American agriculture.

Tom Brokaw narrates this portrait of Iowa's past and present.

President George H.W. Bush's childhood, early career in Texas and rise in the Republican Party.

President George H.W. Bush's role as leader of the first Gulf War, through the final days of his presidency.

Exploring the period between 1963 and 1976 when America was forced to confront the purpose of the vice president and the succession process that is enacted if a president is unable to serve.

Duncan Campbell discovers a very rare silver tobacco box from the 1600s; Serhat Ahmet examines a porcelain egg with a royal connection.

A businessman is shot in a packed boardroom; a dead magpie points the investigation into the world of magic; Patience traces her mother's address and hears some shocking news.

Alphy finds himself adrift following his mother's departure, until a mysterious case forces him back to work; Geordie accepts a promotion that could end their partnership; Leonard rediscovers his calling; Cathy faces temptation at CeCe's.

Tensions flare between Isobel and Cora over the management of the convalescent home; Ethel's flirtation with Maj. Bryant lands her in more trouble than she could have anticipated.

The charred corpse of an Iranian man is found in his house, leaving investigators to question whether it is a case of spontaneous combustion or a diabolical crime.

With a decision about living arrangements finally made, Alistair and Sandy help Lionel move in with Jean.

Foggy wants to do something for the Royal Jubilee. This simple wish means enlisting the support of Compo and Clegg, and offering their services to the Pastor. Things do not quite go to plan.

A distillery owner is poisoned during a group tasting of his premium rum, but the case is shrouded in mystery when it's revealed all the guests drank from the same bottle.

Country singer Kacey Musgraves.

A businessman is shot in a packed boardroom; a dead magpie points the investigation into the world of magic; Patience traces her mother's address and hears some shocking news.

Alphy finds himself adrift following his mother's departure, until a mysterious case forces him back to work; Geordie accepts a promotion that could end their partnership; Leonard rediscovers his calling; Cathy faces temptation at CeCe's.

Tensions flare between Isobel and Cora over the management of the convalescent home; Ethel's flirtation with Maj. Bryant lands her in more trouble than she could have anticipated.

Experts analyze prominent international affairs topics and America's role in a shifting world.

A series of large, complex movements to challenge balance, strengthen the full body, and stimulate the brain.

Benny's toy penguin is swept away by melting snow, transforming a day of sledding into an urgent rescue mission.

Lyla, Luke and Everett look for buried car keys at the beach; Lyla and Everett write a Super Stu comic.

Dylan is excited to play his new game, but things take a turn when the game pieces fall into a floor vent; Carl is determined to get into the FuzzyWorld Book of Records.

Margaret and Teddy miss their dads at music class, but learn that grown-ups come back; Katerina misses her mommy when she goes out to dinner.

Phoebe plans a birthday surprise for Grandma; Phoebe and Jay must tend to the bell pepper in the garden.

Cookie Monster uses his new Cookie Cart to bake for his friends; Grover tries magic to entertain his friends.

When Bex removes her cochlear implant and hearing aid so she can go on the waterslide, Sammy and the Wombats find new ways to communicate; the Wombats love Leiko's new mural.

Donkey Hodie takes Cousin Hodie and Purple Panda on a road trip around Someplace Else, but the plan goes off course.

Rosie wants an ice pop from the Ice Pop Truck, but she must come up with an extra dollar to buy it; Rosie can't decide what to buy at the mercado.

While observing butterflies and caterpillars, the kids realize they've never seen a baby butterfly; Elinor, Ari and Olive put on a circus for their friends.

Peg and Cat face Bad Jack in a showdown at high noon.

Trini wants to send her mom a care package, but she is unable to find all of her favorite things; Trini and her dad find themselves without lights and heat during a blizzard.

Margaret and Teddy miss their dads at music class, but learn that grown-ups come back; Katerina misses her mommy when she goes out to dinner.

When Bex removes her cochlear implant and hearing aid so she can go on the waterslide, Sammy and the Wombats find new ways to communicate; the Wombats love Leiko's new mural.

Phoebe plans a birthday surprise for Grandma; Phoebe and Jay must tend to the bell pepper in the garden.

Benny's toy penguin is swept away by melting snow, transforming a day of sledding into an urgent rescue mission.

Leonardo da Vinci helps Xavier realize it's ok to try many different after-school activities; Amelia Earhart shows Brad that if there is something he wants to do, he should do it.

Alma and Rafia try to give away rubber bands; Alma and Rafia think they've invited too many people to Safina's bake sale.

The twins find out that Tommy is two minutes older than Timmy; Ladonna gets paint on Muffy's dress.

To save the birds of paradise, Aviva puts her dancing skills on the line.

The ins and outs and pros and cons of cruising, including making smart use of limited time on shore and the congestion and commercialism that comes with mass tourism.

A Thomas Hart Benton oil on tin; Kentucky sugar chest; a 1960 inscribed "To Kill a Mockingbird.".

Co-anchors Amna Nawaz and Geoff Bennett and correspondents offer in-depth analysis of current events.

Items reflect 250 years of American art, artifacts, crafts and collectibles; finds include a flag quilt circa 1880, a Tiffany Studios turtleback glass shade circa 1915 and an 1884 Edison light bulb.

A Harry Kellar illusion head; a Dinh Van-designed Cartier gold ring; Tiffany glass mosaics.

An adventure across Iowa's scenic byways, enjoying the historic sites, unique attractions and natural beauty along the way.

Raising a giant pumpkin, the Capitol page program, broadcaster Bob Fisher and Spook Cave.

Following the stories of enslaved and freed Black Americans who fought to define democracy and their liberty through the Revolutionary War.

Oskar Reinhardt and Max must widen the search as they investigate the death of the countess; a new line of investigation opens.

Co-anchors Amna Nawaz and Geoff Bennett and correspondents offer in-depth analysis of current events.

A Romanian town living with bears; cheap energy prices in a German village; Ethiopia's stilt walkers.

An age-old practice of knitting lace by Benedictine nuns; cooking a sacred dish by locals on Pakleni Islands.

Items reflect 250 years of American art, artifacts, crafts and collectibles; finds include a flag quilt circa 1880, a Tiffany Studios turtleback glass shade circa 1915 and an 1884 Edison light bulb.

A Harry Kellar illusion head; a Dinh Van-designed Cartier gold ring; Tiffany glass mosaics.

An adventure across Iowa's scenic byways, enjoying the historic sites, unique attractions and natural beauty along the way.

Raising a giant pumpkin, the Capitol page program, broadcaster Bob Fisher and Spook Cave.

Christiane Amanpour leads discussions about world issues and interviews with global leaders.

Boosting energy with a standing and floor workout that combines leg, core, and back exercises.

As a hurricane approaches, the Hunter kids learn about preparation and safety, moving furniture inside and checking their emergency supplies.

Lyla struggles to sleep and tries to figure out what is wrong with her sleep routine; Lyla tries to do her own hairstyle.

Carl and Sheldon are on a thank-you mission; Carl shows his friends the right way to play with pet rocks.

Neighbors band together to search for Snowball, the class pet who has gone missing; neighbors help out when Daniel and his mom don't feel well.

Jay and Lupe use wayfinding signs to track down Phoebe; Pete and Craig face an epic hoops battle on the courts.

While Abby and Elmo work together to find a lost Bubble Bug, Grover and Cookie Monster stay behind to take care of the fairy garden's magical beasties.

Wombats look for unicorns on the moon; Louisa commands the moon to change its shape.

Cousin Hodie's pet rock Dotto goes missing; Donkey hosts a special tea party but forgets her pals' favorite teas and treats.

For the Day of the Dead celebration, Rosie is in charge of the Catrina doll, but it keeps disappearing; Rosie celebrates Lunar New Year with the Lius.

The kids travel to Moose Mountain to retrieve Ari's plushie after it gets taken by an eagle.

Peg and Cat learn about fractions when they receive orders for half pizzas; the flying pizza pirates try to take Peg and Cat's pizzas.

Molly and Tooey join Nina and Olin on a cave exploration to find out how old Qyah really is.

Neighbors band together to search for Snowball, the class pet who has gone missing; neighbors help out when Daniel and his mom don't feel well.

Wombats look for unicorns on the moon; Louisa commands the moon to change its shape.

Jay and Lupe use wayfinding signs to track down Phoebe; Pete and Craig face an epic hoops battle on the courts.

As a hurricane approaches, the Hunter kids learn about preparation and safety, moving furniture inside and checking their emergency supplies.

Wilma Rudolph encourages Xavier to stay with track and field even though he thinks he should quit; Jonas Salk explains that you don't need a reward for doing a good deed.

On Alma's great-grandmother's 100th birthday, Alma wants to find Bisabuela the perfect gift; even though she can think of all kinds of things that Bisabuela likes, none of them are quite right.

Muffy helps Francine deal with the death of her Bubbe; Arthur and Buster try to make the family vacation more exciting.

Martin and Chris help a stranded koala.

Three classic Greek getaways -- Santorini, Mykonos and Rhodes -- include touring ancient Greek ruins, tracing the vestiges of the Crusades and sampling rustic cuisine.

Green Bay Packers championship group; Joseph Henry Sharp oil; Molesworth lamp and furniture.

Co-anchors Amna Nawaz and Geoff Bennett and correspondents offer in-depth analysis of current events.

Comics Carol Burnett and Niecy Nash see family mysteries solved by DNA.

Exploring how the American Revolution affected Britain, with sabotage, espionage and political unrest reshaping the empire.

Examining the alliance between Crown Prince Mohammed bin Salman and President Donald Trump.

Tom Brokaw narrates this portrait of Iowa's past and present.

After a council clerk is found dead, Barnaby and Jones head to Fennacomobe Bay searching for clues to his murder.