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Alistair tells Jean that Lionel is hiding something.

Hyacinth's plans to take her father on a picnic go awry when he takes the car.

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

Grizzly 399 attempts to raise an unusually large litter in Grand Teton National Park, becoming a hopeful symbol of the survival and preservation of wildlife.

Ancient humans' journey into an icy and perilous new land.

Nebraska's beauty from the sky, mountain biking at Platte River Park and a journey down the Platte River.

Tom finishes the forms for the new foundation and pours the concrete with a new intern; Richard gets the house safe for demolition; Roger and his apprentice save roses and lilacs from being trampled by construction; mold is found in the basement.

News. Reporting on the day's international news from London and from BBC correspondents around the world.

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

Ancient humans' journey into an icy and perilous new land.

From Phoenix to Sydney, finding solutions for extreme heat that is reshaping lives across the globe.

The house in Newton is nearly finished; Kevin finds Tommy and Charlie installing a final detail on the stove; Roger uses flowers, shrubs, and fruit trees to highlight the yard; Liz and Joe pick a countertop.

The life and career of Pulitzer Prize-winning writer Mary Oliver, who published more than 30 collections of poetry and essays.

Exploring the family trees of musicians Lizzo and Flea.

There's a new hallway monitor at Lakewood Elementary; Ladonna Compson thinks everyone likes her.

Olive and Otto investigate a case in which people have turned into puppets; Delivery Debbie and Delivery Doug need help when their food disappears.

An aardvark accidentally becomes a stowaway in Chris' backpack.

Corky is selected to make a presentation at school during a science day celebration, but humidity jeopardizes her project.

Lyla has to help multiple people but rushes each task, which makes things worse; Lyla must use her left hand after hurting her right wrist.

Lotta is determined to show Skyler that she is more than just "headphone girl"; the new kid in school causes a hullabaloo on the playground.

Daniel makes a sea turtle for his class mural at school; Prince Wednesday and Chrissie find a caterpillar.

Phoebe and Jay learn how to keep cool while using their thermometer to track the temperature in the apartment; Pete and Grandma Annie teach the kids how to tell time.

Tamir is disappointed when Grandma Nell shows off the drawing he made for Chris before it is finished.

Mr. E has a lot of ping-pong balls and the survey says that he should sell the purple ones; Super's lost her glasses and the Lost and Found Patrol try to find them.

Donkey is excited about directing a new show starring all her pals; Donkey and Panda discover a surprise spider.

Things get out of control when Rosie starts a pet-sitting business; Rosie plays with a rock from Javi's rock collection.

Elinor and her friends come up with a plan when lizards get in the way of Mrs. Beaver's new park bench; Elinor and her friends observe birds.

Alma takes shortcuts so she can play soccer with Beto, but her plan backfires; Alma saves the Nighttime Dance Break party.

When one of Connie's prized turkeys goes missing on Molly and Tooey's watch, it's up to them to track it down; Molly, Tooey and Trini decide to build their own sailboat and voyage to distant waters.

Isaac Newton shows Xavier that when it comes to solving something tricky, it's best to slow down and think through the problem; Golda Meir shows Yadina that she should tell people when there's a big problem, so it can be solved together.

Tamir is disappointed when Grandma Nell shows off the drawing he made for Chris before it is finished.

Daniel makes a sea turtle for his class mural at school; Prince Wednesday and Chrissie find a caterpillar.

An unpublished Art Spiegelman book proposal circa 1974; headboard from the set of "The Godfather: Part II"; rare photographic baseball cards with a handwritten letter from the 1871-1872 Boston Red Stockings.

A painting featuring the beautiful colors of a cool autumn day.

A soft mountain scene with lacy bushes and birch trees.

Showbiz pals Pam Ayres and Geoffrey Whitehead head to an auction in Cirencester alongside Kate Bliss and James Braxton.

Exploring the history, artistry and impact of personal adornment with jewelers Tom Herman, Harriete Estel Berman, Art Smith, Gabrielle Gould and Jesse Monongya.

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

Panel of experts answer lawn & garden questions.

What's under the hood matters, but not as much as stories that stretch across the miles and fuel our affection for classic cars.

The new addition foundations are poured and backfilled; installing a beam to support the new opening from the dining room to the kitchen; the interior designer helps with decisions; Tommy and Kevin discuss the new apprentices.

News. Reporting on the day's international news from London and from BBC correspondents around the world.

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

The life and work of the sculptor, carver, painter and miniature architect.

Historic footage, photographs and interviews shed light on the survival stories of East Hampton's first European settlers who have fished and farmed the East End of Long Island since 1648.

From Phoenix to Sydney, finding solutions for extreme heat that is reshaping lives across the globe.

Grizzly 399 attempts to raise an unusually large litter in Grand Teton National Park, becoming a hopeful symbol of the survival and preservation of wildlife.

Ancient humans' journey into an icy and perilous new land.

Lakewood Elementary students must share their school with rival students whose school gets flooded; the gang doesn't know what to do when the internet goes out.

Ozzie and Orli think they know who is responsible when the museum reports missing shapes; Miss Information uses bar graphs to spread false data.

The Kratt brothers use a new archery skill to rescue baby animals from Donita Donata's yacht.

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

Lyla, Everett and her sisters build makeshift carnival games for their brother, Luke, using household and recycled materials; Louisa seeks help to create a special beat for her school presentation.

Carl gets a universal screwdriver for his birthday; a storm creates a hole in the walkway to Carl's house.

Daniel learns to ask before hugging Margaret; Jodi learns that it is important to ask first before touching someone else.

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

After looking at the moon through Yasmine's telescope, Tamir, Elmo and Zoe pretend to be astronauts traveling to the moon.

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, Cousin and Grampy open a froyo stand for their neighbors; Panda changes his mind about what to bake for the Baking Bonanza.

Rosie and Javi make a chalk town in the circle drive, but run into trouble when others want to use the space as well; Rosie tries to fix the community garden herself, but it turns out to be difficult.

The kids learn the best way to slide down a hill; Ari and his friends learn the importance of oral health after Ari forgets to brush his teeth.

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.

Molly is eager to help the Kratt brothers track a missing wolf pack; Molly and friends investigate a strange noise.

Ruth Bader Ginsburg inspires Yadina to speak up when the girls are left out of a Nature Troop activity, and she realizes she has the power to create change.

After looking at the moon through Yasmine's telescope, Tamir, Elmo and Zoe pretend to be astronauts traveling to the moon.

Daniel learns to ask before hugging Margaret; Jodi learns that it is important to ask first before touching someone else.

A 1956-1958 Celtics team-signed photo and basketball; Buffalo Bill poster circa 1893; an Edwardian sapphire and diamond ring.

Viking stew at the Midgard Viking Center; cinnamon buns at painter Edvard Munch's house in Asgardstrand; making chocolate mousse in the grand hall of the historic Naval Society Hotel.

A culinary tour showcasing the rich food traditions of New Orleans.

Exploring America's ancient cities; a lost city on the Mississippi River; native elders reveal ancient powers of the sky.

A Civil War soldier's letter; fabric from an aircraft could be linked to Charles Lindbergh and Igor Sikorsky; 1950s comic book "Negro Romance.".

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

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

The Vienna Philharmonic performs an open-air concert from the gardens of Austria's Schönbrunn Palace; bass-baritone Bryn Terfel performs arias from "Falstaff" and Tevye's song from "Fiddler on the Roof.".

A musical journey through Europe with Rick Steves and the Cincinnati Pops Orchestra includes Romantic-era anthems from Strauss, Grieg and Verdi.

Twenty-four hours a day, the latest national and international stories as they break.

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