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

Cruising the River Seine; Napoleon's tomb; Louvre; shopping in Paris; Bastille Day celebration.

When a new arrival is found dead at a gated estate, Barnaby realizes the likely killer is an ex-police officer.

Mike, Kristin, and the team look into the murder of a farmer's market owner, who staggers into the crowd with a garden implement embedded into her back.

A look at an 8th-century Pictish carving, a cane concealing a telescope and a compass, an engineer's prized silver salver, 17th-century silk shoes, a history-making sheep's fleece and bagpipes.

Becca and Rosaline reel from shock and seek solace in different directions as revelations about the circumstances surrounding Mary's death come to light.

Edmond reveals to Villefort that Heloise stole the vial of poison from him, the same poison used to murder the Marquise; Villefort confronts Heloise, threatening to expose her.

D.W. doesn't want another pet after her bird, Spanky, dies; Buster's too busy to spend any time with Arthur.

Owen and Ohio provide backup on a case, so they can have a pizza party; an unlucky coin is accidentally released to the public.

A Creature Quiz challenge question about the differences between a crocodile and an alligator turns into a Crocogator contest.

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

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

Carl blames Nico when his special crayon breaks and Nico blames Carl when his drawing rips; Lotta tries to learn to play the alto saxophone.

The Tiger Family goes to the restaurant for taco night; Music Man Stan comes to school for a musical story with the class.

Phoebe and Jay set a new record for the longest paper airplane fight; Phoebe and Jay learn how to build a stable pillow fort.

Reporters Elmo and Abby offer strategies to Nursery Rhyme characters experiencing big feelings of excitement, nervousness and frustration.

The Wombats track down a scary-weird sound that has frightened Carly, CeCe and Clyde; the Wombats become Hopping Helpers for a day.

Donkey and Panda must complete hard challenges to earn badges for Try Scouts; Donkey and Duck Duck teach Bob Dog a new game.

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 play Hide-and-Go-Seek but are unable to stay hidden from the Goat twins; an owl inspires Elinor's costume for Costume Day.

Alma cheers up Lucas after he misses out on a trip to the Statue of Liberty; Alma and Andre help Dona Carmen with a recipe.

Molly faces big obstacles while training for a cross-country ski race; Molly and her family lose their lunch when a seal sneaks onto their boat and steals their food during a fishing trip.

Bruce Lee helps Xavier and Brad realize that no matter how angry they get, they are in charge of what their body does; Sonia Manzano shows Yadina that telling stories can help manage big feelings.

Pork stew stacked in corn tortillas; poison beans; Argentinian chorizo and carne asada torta; chimichurri with a Mexican accent.

Yeasted doughnuts; vegan chocolate ice cream tasting; banana muffins with coconut and macadamia.

Creatures of the ocean must deal with violence as a part of life.

Actor Michael Douglas and writer/director Lena Dunham explore their family roots.

Using a mobile CNC routing machine; building a dog dish stand using power tools; different methods for wiring a portable generator to a house.

A detailed look into news stories from around the world from the BBC news desk in Washington, D.C.

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

Coverage from Washington, D.C. and London, with a regular panel of guests from across the political spectrum discussing the biggest stories of the day.

The Ring Road -- the 800-mile loop around Iceland on Highway 1; the geothermal hot zone of Lake Mývatn; the rugged Eastfjords; glacier lagoons of the Southeast; waterfalls and beaches of the South Coast; puffins at the Westman Islands.

Jamie Chung, Cyndi Lauper and Danny Trejo retrace the journeys of their immigrant ancestors.

Research into the ancestry of singer Lea Salonga and actress Amanda Seyfried reveals relatives who survived heart-wrenching ordeals.

President Trump's unprecedented challenges to the Federal Reserve and what it means for the economy; tracing the battle between Trump and the Fed as the central bank steers the economy through an increasingly precarious moment.

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

Jamie Chung, Cyndi Lauper and Danny Trejo retrace the journeys of their immigrant ancestors.

Sister Veronica weighs her future with the Order; Dr. Turner makes a final stand against the council's news before the maternity home closes; the Mullucks campaign for the rights of all thalidomide victims.

Becca and Rosaline reel from shock and seek solace in different directions as revelations about the circumstances surrounding Mary's death come to light.

Edmond reveals to Villefort that Heloise stole the vial of poison from him, the same poison used to murder the Marquise; Villefort confronts Heloise, threatening to expose her.

A tranquil cruise along the rivers and canals of France's Burgundy region; tasting the vintages of the Cote-d'Or.

Scott helps a homeowner raise and lower a light with a motorized lift; Tom shows Kevin the best uses for a jigsaw and how to choose blades; Roger visits Kentucky to help a homeowner repair his once lush lawn.

Green Bay Packers salesman's sample championship rings; Barbie dolls and wardrobe circa 1960; a 1977 Keith Haring Bean Salad lithograph.

Arthur discovers some neat stuff in the attic on a rainy Saturday; the world's worst cook, Grandma Thora, wants to help the bake sale.

The Terrible Three break into HQ intent on planning ultimate oddness; the Agents must close the containment units before oddness takes over the whole town.

Martin and Chris pose a challenge to Koki and Aviva about who has the most challenging job.

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

The Loops play fun practical jokes on each other; Loops Lunch moves outside because of a blackout, but it causes many problems.

Carl's medium-sized fuchsia yo-yo goes missing from his collection; a rainy day changes Carl's pool day plans.

Daniel and Mom make a coconut swirl snack together; when a backyard campout is rained out, Jodi, Teddy and Leo find that they can still have a special night being together.

Phoebe and Jay use Miss Jean's field guide to identify their new butterfly friend; Phoebe gets courage to perform at the talent show.

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

The Treeborhood is alive with sound patterns; Zadie loses one of Louisa's toys.

Panda hopes to find a quiet way to show his love for the moon moths; Donkey helps Panda fix his spaceship.

Rosie and Javi's pirate adventure goes awry; Rosie has trouble choosing a job at the first Fun Club meeting.

Elinor's power goes out, making her house look different; Elinor's Frisbee gets stuck in a tree.

Alma searches for the best way to greet others; Alma wants to figure out why Junior is shy around his new sitter.

Molly and Tooey get lost in the wilderness while gathering firewood; Molly uses a constellation to find her way to Grandpa's friends cabin.

Jackie Robinson shows Xavier that it takes courage to change something that isn't right.

Candied orange and pineapple empanadas.

Mustardy apple butter-glazed pork chops; a white chocolate chip tasting; reviewing grill spatulas; the secrets to browned butter blondies.

For creatures of all sizes, the challenge of finding food drives life in the Pacific.

The story behind David Attenborough's wildlife documentary series "Life on Earth," which changed his life forever.

Jenn visits Washington's Cherry Blossom Festival and plants a tree; Mark learns how Mount Rushmore was built and shows stone cutting; Nathan visits Abe Lincoln's house then replaces mortise hardware.

A detailed look into news stories from around the world from the BBC news desk in Washington, D.C.

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

Coverage from Washington, D.C. and London, with a regular panel of guests from across the political spectrum discussing the biggest stories of the day.

Switzerland's mountains and culture; scenic train rides; exploring glaciers; making cheese the old fashioned way.

Onsite extraction of fossils of an ichthyosaur, a fish lizard that ruled during the time of the dinosaurs, and a 3-D reconstruction of the creature; host David Attenborough.

Exploring the quantum universe.

Pioneers from Guatemala to Japan share space with wildlife and restore the way we coexist and cultivate among the trees.

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

Onsite extraction of fossils of an ichthyosaur, a fish lizard that ruled during the time of the dinosaurs, and a 3-D reconstruction of the creature; host David Attenborough.

Father Brown takes the lead when, during a television dancing contest, things turn grave and a contestant becomes a target of an attempted murder.

The Lyell are called to King's Cross Station Museum, where they discover the bodies of eight victims entombed below; with the knowledge that a serial killer was operating in London nearly 20 years ago, Nikki and the team know they will be busy.

A crossword puzzle is found on a murder victim, and the police seek help from crossword queen Cora.

Research into the ancestry of singer Lea Salonga and actress Amanda Seyfried reveals relatives who survived heart-wrenching ordeals.

Jamie Chung, Cyndi Lauper and Danny Trejo retrace the journeys of their immigrant ancestors.

Arthur can't come up with a jingle for a cereal contest; D.W. struggles to do cartwheels as well as Emily.

Olive and Otto investigate why things are disappearing all around town; one of the four Debbies from Debbie's Pizzeria disappears.

Chris, Martin and Aviva need osprey creature powers to find keys that Jimmy dropped in the ocean.

The Hunter kids head to the state park to learn why leaves change color.

Lyla gets a strike her first time bowling but gets frustrated when she realizes bowling isn't as easy as she thought it was; Lyla feels left out when Everett and Ale's friendship thrives.

Carl doesn't know what to do when Nico falls; Carl learns a new word -- shindig.

Daniel gets mad when he doesn't get a crayon box right away at the Crayon Factory.

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

While watching baby dragons for the first time, Abby, Elmo and crew join voices for a soothing bedtime bop to make sure the little beasties go to sleep.

Zadie earns Junior EMT status and follows Ellie on her EMT calls; the Wombats bake a boat-shaped birthday cake.

Duck Duck learns how to fix her broken bookcase; Donkey welcomes Greeble the Treeble to Someplace Else.

Rosie puts on a concert when Tia is unable to get tickets to see her favorite singer; Rosie loses her first tooth, and prepares to welcome both the Tooth Fairy and the Tooth Mouse.

Elinor and her dad learn how to make their own chocolate; after accidentally breaking a jade plant, the kids learn how the plant grows.

Alma and Junior teach Uncle Nestor how to ride his first bike; Papi lets Alma go to the grocery store by herself.

A heat wave hits Qyah and Molly is determined to find out the highest temperature on record; Molly and Trini must save Qyah from a wildflower.

Xavier and Yadina overcome a sibling spat with the help of Confucius; Sacagawea helps Xavier and Brad realize that just because Yadina is younger, she can do more than they think.

Making piloncillo the traditional way; orange and piloncillo adobo pork roast pizza; flour pizza dough; orange piloncillo adobo pizza sauce.

A flavorful tandoori salmon; favorite kitchen gadgets under $15; a tasting of yogurt; broiled smashed zucchini with garlicky yogurt.

The quest to multiply includes an array of unusual behaviors and adaptations by forest penguins, great white sharks and other species; male pregnancy.

Stephen Hawking considers whether time travel is possible; ideas include DeLorean, atomic clocks, a giant black hole and a large swath of New York.

Ross tests out smart lighting; Tom helps a homeowner build a custom screen door; Richard gives advice on maintaining a washing machine; Mauro shares techniques to paint old 1960s wood trim.

A detailed look into news stories from around the world from the BBC news desk in Washington, D.C.

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

Coverage from Washington, D.C. and London, with a regular panel of guests from across the political spectrum discussing the biggest stories of the day.

The cuisine of Lyon, France; Chamonix in France; riding the lift up to Aiguille du Midi and to the border of Italy; hiking the Tour du Mont Blanc -- the trail that circles the mountain.

Touring a new attic apartment ADU in Dorchester, Mass.; plumbing update.

Replacing vintage ceramic toothbrush and soap holders; repairing a water-damaged ceiling crack matching the original swirl texture.

Two antiwar protests in the fall of 1969 cause President Richard Nixon to cancel his "madman" plans for a massive escalation of the U.S. war in Vietnam.

The stories of three women quilters whose lives complement and contrast each other are shown in "American Seams"; a Vietnamese American daughter captures her parents' dreams in "Thoi Tho Au (Childhood)."

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

Touring a new attic apartment ADU in Dorchester, Mass.; plumbing update.

Replacing vintage ceramic toothbrush and soap holders; repairing a water-damaged ceiling crack matching the original swirl texture.

Alexa must discern fact from fiction when a compulsive liar confesses to a murder at a high-end jeweler.

Mervin reopens his mother's case and uncovers the prime suspect in her murder; though evidence points to this suspicious figure, they can't determine how foul play occurred.

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.

Onsite extraction of fossils of an ichthyosaur, a fish lizard that ruled during the time of the dinosaurs, and a 3-D reconstruction of the creature; host David Attenborough.

Exploring the quantum universe.

Sue Ellen becomes obsessed with an Internet game; the gang must decide whether to go on a camping trip.

Ozzi and Orli go on a mission to catch the villain who is ruining the Triangle Sisters' café; Opie must collect enough money to pay for Captain O's 10-layer birthday cake.

Chris and Martin search for an obscure rain forest creature.

The Hunters learn how temperatures can affect outdoor plants and gardens.

After feeling left out, Luke decides to switch places with Stu; the Loops kids throw a surprise party for their parents.

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.

Daniel and Miss Elaina don't want to stop playing when it is time for Quiet Time at school; Daniel finds something that will help him rest.

Phoebe and Jay use a checklist to guide them through their tasks; Jay creates his first comic book and learns about the importance of page order.

Abby, Big Bird and Cookie Monster play against Gabrielle, Zoe and Elmo in I Wonder If We Can Use This, a game where they figure out if items can be used for something.

Devonte J. Squirrel moves to the Treeborhood; Devonte and the Wombats create a machine that makes ice cream using a bike.

Donkey wonders if she and her cousin can have fun together since they don't like doing the same things anymore; Panda thinks about how he is different from other pandas.

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 surprise Ms. Mole for Teacher's Day; a pig named Rudy helps Elinor and her friends sniff out some truffles.

Alma helps Mr. Ramirez figure out what to do when he lets too many cats into his shoe shop; Alma tries to convince Howard to play stickball.

Molly and Vera visit an excavation site, where they make a discovery; the Sassy Ladies of Saskatoon search for a glacier.

Grace Hopper shows Xavier that he will never know if he can build his robot differently than everyone else unless he tries; Itzhak Perlman shows Xavier that he can learn music his own way.

Talking about art with photographer Nuria Lagarde; author Laura Esquivel reflects on magical realism; celebrating how art and identity shape Mexico City's creative soul.

Broiled chicken with gravy; toaster ovens; toaster oven gear; skillet roasted broccoli.

A behind-the-scenes look at "Big Pacific" includes highlights and challenges of filming wildlife.

People who lost touch after the civil rights movement hope to reconnect.

Touring a new attic apartment ADU in Dorchester, Mass.; plumbing update.

A detailed look into news stories from around the world from the BBC news desk in Washington, D.C.

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

Coverage from Washington, D.C. and London, with a regular panel of guests from across the political spectrum discussing the biggest stories of the day.

April Fair in Seville, Spain; Bastille Day in Paris; running with the bulls in Pamplona, Spain; Munich's Oktoberfest; a traditional family Christmas; Nuremberg, Germany's holiday market; sledding by torchlight in Switzerland.

Storytellers face moments where they had to think on their feet -- making a case, taking a risk or seizing an opportunity.

Teams compete from a statewide roster to become the next academic champions.

Based on the 1935 movie musical starring Fred Astaire and Ginger Rogers, "Top Hat" features dazzling choreography and period sets, with an Irving Berlin score featuring "Cheek to Cheek," "Let's Face the Music and Dance" and "Puttin' on the Ritz."

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

Baltimore Mayor Brandon Scott discusses leadership, public safety and the future of Baltimore.

A wardrobe mishap forces Carly Ciarrocchi to rethink what it really means to fit in; Adam Selbst's job takes a wild turn; Rory Scholl realizes fame isn't as glamorous as it seems.

Ajay Gallewale's innocent mistake at airport security spirals into a full-blown interrogation; Anoush Froundjian navigates the strict traditions of Armenian school until a surprising occasion changes everything; Sean Brown pursues his NBA dreams.

William's teenage crush takes him on an unexpected journey of self-discovery; a college romance leads Erin to an academic awakening; Ian's hesitation to take the next step in life is shaken by a fire.

Ajay helps his team win a baseball game in India; Shannon and his brother unexpectedly bond through baseball; Andrew chases a dream of pitching a no-hitter.

Warsaw, Poland; gingerbread bakeries in red-brick Toruń; the Teutonic knight fortress of Malbork; Hanseatic townhouses in Gdańsk.

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

Margaret Hoover leads interviews and debates.

Onsite extraction of fossils of an ichthyosaur, a fish lizard that ruled during the time of the dinosaurs, and a 3-D reconstruction of the creature; host David Attenborough.

The Ring Road -- the 800-mile loop around Iceland on Highway 1; the geothermal hot zone of Lake Mývatn; the rugged Eastfjords; glacier lagoons of the Southeast; waterfalls and beaches of the South Coast; puffins at the Westman Islands.

Touring the "Mister Rogers' Neighborhood" television studio and meeting the staff.

Arthur can't come up with a jingle for a cereal contest; D.W. struggles to do cartwheels as well as Emily.

Chris, Martin and Aviva need osprey creature powers to find keys that Jimmy dropped in the ocean.

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

Lyla gets a strike her first time bowling but gets frustrated when she realizes bowling isn't as easy as she thought it was; Lyla feels left out when Everett and Ale's friendship thrives.

Carl doesn't know what to do when Nico falls; Carl learns a new word -- shindig.

Daniel gets mad when he doesn't get a crayon box right away at the Crayon Factory.

Ronald, a meticulous, rule-following pig, and Roxy, a free-spirited musical hedgehog, explore the "wows" of one of America's most extraordinary places -- Sequoia National Park.

Rudy is afraid of getting a shot at the doctor's office, so Nina and Abby play pretend to show what the visit will be like so he can feel less scared.

Two brothers connect to their Hawaiian roots through language and the practice of hula.

Crawfish pie; baked stuffed flounder with herbsaint butter; banana fritters.

A tapas tour of Barcelona, Spain; salt and garlic; chicken in vinegar sauce; a cheesy dip.

Chinese, Korean, Indonesian and Japanese techniques shape Nordic ingredients, regenerative farms and Baltic seafood, resulting in cooking that is contemporary yet deeply tied to place.

Harvesting and charring nopales over an open flame; celebrating the traditions of Milpa Alta's community over a meal of mole and nopales.

Four generations at Hildebrand Farms Dairy provide milk and cream bottled in reusable, sustainable glass; lasagna with Mornay sauce, sausage, red peppers and spinach.

Kale salad with avocado and pistachios; marinara sauce; no-mess cheesy baked chicken wings.

Exploring the bonds of friendship in Italy.

Dakos salad; kolyva; Greek island stuffed onions.

Grilled flank steak; why cooking some meat to medium makes them more tender; reviewing aluminum foil; chili crisp noodles.

Slow-roasted duck with blackberry sauce; the best uses for different tinned fish; a rich bean bourguignon.

The Middle East's rich coffee culture and traditions; the cultural significance of Gahwa, traditional Emirati coffee, and how it's prepared; early morning Emirati classics at Al Fanar Restaurant; Greek-style coffee cake.

Mexican American television host César Millán talks about his path from undocumented immigrant to international television star.

Among the millions of immigrants arriving in the United States at the turn of the 20th century were thousands of Muslims from Lebanon, then part of Greater Syria; host Aymann Ismail tells the story of two of these people.

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

Teams compete from a statewide roster to become the next academic champions.

Teams compete from a statewide roster to become the next academic champions.

Salsa dancing and rum tasting in Puerto Rico; Sea Islands off the coast of Georgia; learning about the lost colony of Roanoke on the Outer Banks of North Carolina; Wild Pony Swim in Chincoteague, Va.

Sister Veronica weighs her future with the Order; Dr. Turner makes a final stand against the council's news before the maternity home closes; the Mullucks campaign for the rights of all thalidomide victims.

Becca and Rosaline reel from shock and seek solace in different directions as revelations about the circumstances surrounding Mary's death come to light.

Edmond reveals to Villefort that Heloise stole the vial of poison from him, the same poison used to murder the Marquise; Villefort confronts Heloise, threatening to expose her.

Storytellers face moments where they had to think on their feet -- making a case, taking a risk or seizing an opportunity.

Music teacher and conductor Juana Alzaga sets out to create Georgia's first youth orchestra for undocumented and mixed status families; "A Mother's Promise."

Visual interpretations of classical music set to images of nature, fantasy, historical locations, architecture and art; host Barry Bostwick.

Singer-songwriter Barry Manilow performs fan favorites including "Somewhere in the Night," "Mandy," "Copacabana," "Daybreak" and "I Write the Songs."

Tony Bennett performs duets with a celebrated roster of performers including Marc Anthony, Gloria Estefan and more.

Onsite extraction of fossils of an ichthyosaur, a fish lizard that ruled during the time of the dinosaurs, and a 3-D reconstruction of the creature; host David Attenborough.

Pioneers from Guatemala to Japan share space with wildlife and restore the way we coexist and cultivate among the trees.

Playing the fife and drum; Daniel Tiger learns about friends and sadness.

Sue Ellen becomes obsessed with an Internet game; the gang must decide whether to go on a camping trip.

Chris and Martin search for an obscure rain forest creature.

The Hunter kids head to the state park to learn why leaves change color.

After feeling left out, Luke decides to switch places with Stu; the Loops kids throw a surprise party for their parents.

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.

Daniel and Miss Elaina don't want to stop playing when it is time for Quiet Time at school; Daniel finds something that will help him rest.

Phoebe and Jay set a new record for the longest paper airplane fight; Phoebe and Jay learn how to build a stable pillow fort.

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

Storytellers face moments where they had to think on their feet -- making a case, taking a risk or seizing an opportunity.

Spring brings unique forageable foods like ramps, morels and fiddleheads; maintaining forest health and preserving its ecology makes foraging possible.

Indigenous and early American food traditions; clamming on Cape Cod; the secret of Red's Eats' famous lobster roll.

Chasing down the South's pie cherry to a dye house tree on a Kentucky farm.

James Moss, founder of Moss Winery; sommelier Tonya Pitts; the Napa Valley Wine Train ride.

Onsite extraction of fossils of an ichthyosaur, a fish lizard that ruled during the time of the dinosaurs, and a 3-D reconstruction of the creature; host David Attenborough.

Exploring the quantum universe.

Pioneers from Guatemala to Japan share space with wildlife and restore the way we coexist and cultivate among the trees.

Jamie Chung, Cyndi Lauper and Danny Trejo retrace the journeys of their immigrant ancestors.

Teams compete from a statewide roster to become the next academic champions.

Teams compete from a statewide roster to become the next academic champions.

Although heralded as a model minority, bold ambition leads Asian Americans to national political office as a culture-quake simmers beneath the surface.

Ketch Secor and journalist David Greene travel the country fostering open conversations on gun rights and violence.

Elizabeth I's image as a warrior queen, facilitated by myths and secrets about her victory over the Spanish Armada, shaped British national identity for centuries.

Everything comes to a head as Richard and Jim descend on Bayview; the family tries to heal and reconnect; the fallout from Mary's actions continues to reverberate.

When the Titanic goes down, Lord Grantham loses his heirs, and Mary loses her fiance.

In 1967 two young boys set off on a journey from Massachusetts to Montreal with a pony named King.

Celebrities, cast members and Joanne Rogers recall their favorite moments from "Mr. Rogers' Neighborhood" as they celebrate the 50th anniversary of the series.

Celebrating Europe's art and creative geniuses, from Leonardo Da Vinci to Vincent van Gogh; Florence's bold "rebirth" after Europe's medieval struggles; impressionist works of the late 1800s.

Tracing George Harrison's artistic journey from the "quiet Beatle" to a powerful creative force, his work with Indian musicians and his late-career resurgence with the Traveling Wilburys.

Jamie Chung, Cyndi Lauper and Danny Trejo retrace the journeys of their immigrant ancestors.

Research into the ancestry of singer Lea Salonga and actress Amanda Seyfried reveals relatives who survived heart-wrenching ordeals.

When Binky's family adopts a baby girl from China, Binky worries about how his life will change and if his new sister will like him.

Olive and Otto are zapped into a comic book.

Martin and Chris uncover a plot by Donita Donata to capture sea horses to make living jewelry.

The Hunters head to a nearby mountain to learn about snow.

Lyla and Ale make an escape-proof container for her pet tarantula; rain keeps the kids inside, so they recreate park activities indoors.

Lotta is frustrated learning a new dance, but realizes it is ok to experience music in her own way; Sheldon worries about telling Carl that he doesn't want to play pirates anymore.

Daniel's rushing to go on a boat ride causes him to break his toy boat.

Phoebe and Jay are asked to bird sit; photo time leads Jay to an outfit disaster.

Big Bird is meeting Snuffy at Hooper's for lunch, and everyone decides to surprise him with a Snuffy-sized sandwich named after him, the Snuffwich.

Mr. E learns a dance for Friendship Day; Super, the Wombats and the Boo Boo Blimp to the rescue when the power goes out for the Friendship Daylight Show.

Donkey tries to act like a bird at Duck Duck's bird party, but she does not enjoy herself; Grampy and Donkey miss Gregory while he is away at camp.

Rosie and Javi's pirate adventure goes awry; Rosie has trouble choosing a job at the first Fun Club meeting.

Elinor, Olive and Ari disagree about the best way to build a couch cushion castle; when Ari misplaces the group's favorite ball, they discover that he needs a system for keeping track of his things.

Alma is consumed with her starring role in a musical; Alma and Harper have a playdate at the Rivera house.

Molly finds a lost baby beluga and tries to reunite it with its mother; Molly and Grandpa Nat try to retrieve Molly's fishing hat after it floats away.

James Braidwood explains to Brad that being prepared can help him stay calm when he is feeling nervous; Xavier and Yadina learn that being responsible can involve making hard choices.

Spicy honey, garlic and orange roasted duck; skillet corn tamal with duck fat and roasted garlic.

Upside-down tomato tart; buying tomatoes; the Leidenfrost Effect; hearty Greek salad.

Madagascar, the strangest and oldest island on Earth, has seen more unique wildlife than any other island.

A Cartier Art Deco Tutti Frutti clutch circa 1925; a Carl Kauba cowboy bronze circa 1900; a Sumerian cuneiform tablet.

Replacing vintage ceramic toothbrush and soap holders; repairing a water-damaged ceiling crack matching the original swirl texture.

A detailed look into news stories from around the world from the BBC news desk in Washington, D.C.

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

Coverage from Washington, D.C. and London, with a regular panel of guests from across the political spectrum discussing the biggest stories of the day.

The rise and fall of fascism in Germany; tracing the roots of Nazism after World War I, from Munich to Nuremberg to Berlin; exploring the totalitarian society built by Adolf Hitler.

Finds include a 1961 JFK Santa Claus Letter, a 1979 Ed Ruscha Stage Fright ink on paper and a John Juzek violin circa 1950.

An 1880 Celia Thaxter hand-painted vase; a 1964 Presidential Rolex with the box and papers; a Mary Elizabeth Price painted screen circa 1925.

Filmmaker Vicky Du traces her family's mental illness back to the Chinese Communist Revolution of 1949.

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

Cruising the River Seine; Napoleon's tomb; Louvre; shopping in Paris; Bastille Day celebration.

A trendy organic bakery causes resentment among villagers; several people are dosed with a dangerous hallucinogenic.

A fundraising evening at the historic Brokenwood Empire Cinema becomes fatal when a fire breaks out, and after the smoke clears, a businessman is found strangled.

Objects that provide insight into the history of nursing and health care, from medals awarded for bravery to early uniforms, cartoons and medical equipment.

The Eiffel Tower; cruising the Seine; visiting the market for fresh food and flowers; window-shopping in Paris; a nighttime ride through the city.

When the Titanic goes down, Lord Grantham loses his heirs, and Mary loses her fiance.

Muffy's dad is the new soccer coach; Binky refuses to play in band practice.

Orli and Ozzie must find two grown-ups lost in HQ; Odd Squad goes undercover at a villain wedding.

The Wild Kratts find a lost otter cub.

The kids learn what colors make up a rainbow just in time for a Mother's Day surprise.

The Loops go on a scavenger hunt around the supermarket to solve clues to get tickets to "Oaty Zappers on Ice"; Lyla tries to act older so she can hang out with her cousin.

Carl loves the new sweater his Pop Pop knit him, but it feels itchy when he wears it; Carl is nervous about his new school bus stop.

Daniel is excited to learn something new about Trolley.

Phoebe, Jay and Lupe practice their fire safety plan when the fire inspector visits; Phoebe and Jay buy juice from Mr. Aguilar.

Abby, Big Bird and Cookie Monster play against Gabrielle, Zoe and Elmo in I Wonder If We Can Use This, a game where they figure out if items can be used for something.

Ellie's so excited to be going home to Jamaica that the Wombats and Mr. E start to worry whether she'll come back; Buckley comes over for a playdate with Zadie.

Donkey and Grampy try to make an old family recipe; Donkey and Panda are excited to try a new cereal.

Rosie and her friends pretend to be pirates, but they need a globe to plan a route around the world; June and Rosie plan a virtual breakfast.

Elinor and her friends learn what makes Olive's mom's curry so spicy; Ari's muscles hurt after playing too much baseball.

Alma is excited when she grows a pepper that looks like Chacho; Alma rides the 6 train all day.

Molly and Vera want to make lumpia, a tradition from the Philippines, for Vera's mom; a bunch of ladybugs gets loose in the Trading Post during a spooky sleepover.

Jesse Owens encourages Brad after he becomes frustrated with bowling; Ella Fitzgerald inspires a nervous Brad to go to a dance party.

Red tacos with queso fresco and piquin salsa verde; piquin salsa verde; hash, corn, chorizo and eggs.

Fresh peach pie with all-butter lattice top; sugar.

From its rich coral reef and lush jungles to its mountainous heart, Borneo holds more diversity of life than any other island.

Jamie Chung, Cyndi Lauper and Danny Trejo retrace the journeys of their immigrant ancestors.

Kevin works with Jenn Largesse to demonstrate a technique on a trim router; Heath grounds an outlet; Mauro explains paint rollers and demonstrates rolling techniques; Mark replaces fireplace doors.

A detailed look into news stories from around the world from the BBC news desk in Washington, D.C.

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

Coverage from Washington, D.C. and London, with a regular panel of guests from across the political spectrum discussing the biggest stories of the day.

Kraków, Poland; Wawel Castle; Polish cuisine, including pierogi; Nowa Huta offers a nostalgic spin through the Cold War days; Auschwitz-Birkenau concentration camp.

Traveling across China and the American South to reveal the ancestry of novelist Amy Tan and poet Rita Dove.

Exploring the life and legacy of Black civil rights pioneer W.E.B. Du Bois, including how he transcended the social constraints of the early 20th century and worked to elevate the lives of Black people worldwide.

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

Traveling across China and the American South to reveal the ancestry of novelist Amy Tan and poet Rita Dove.

Elizabeth I's image as a warrior queen, facilitated by myths and secrets about her victory over the Spanish Armada, shaped British national identity for centuries.

Everything comes to a head as Richard and Jim descend on Bayview; the family tries to heal and reconnect; the fallout from Mary's actions continues to reverberate.

When the Titanic goes down, Lord Grantham loses his heirs, and Mary loses her fiance.

Scott visits Alaska to install a portable generator with a manual transfer switch to power hardwired appliances; Richard goes inside a dishwasher to explain each cycle; Tom repairs a piece of wood nosing.

An 1880 Celia Thaxter hand-painted vase; a 1964 Presidential Rolex with the box and papers; a Mary Elizabeth Price painted screen circa 1925.

Arthur scrambles to fix his mother's computer before she finds out he broke it; Francine gets blamed when Muffy cheats on a math test.

The agents turn to Odd Todd for help when things in town get covered in jam; agents have a hard time relaxing at lunch.

The team explores the American prairie and bison.

The Hunters investigate a weather mystery surrounding massive rocks that move on their own in the desert.

Lyla and Everett coach Luke, Stu and Idris in soccer drills before their first practice; Liana and Louise decide to switch rooms with Lyla and Luke.

Carl makes a new friend while visiting his dad; Lotta thinks if she copies Nico, everyone will like her.

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

Phoebe and Jay accidentally get paint on the mail and have to decode addresses; Phoebe and Jay find their parents' box of memories.

Tango loses focus when Elmo tries to teach him a new trick.

Kaya's cooking class; the Wombats go on a treasure hunt.

Bob Dog has trouble playing Purple Putt-Putt by the rules; the pals try outfits from Harriett's invention.

Rosie and Javi want to play Abuela's song for Music Night at Tia's Restaurant; Rosie wants to be an inventor.

Elinor and her friends set out to return Ms. Mole's glasses to her after she forgets them at school; Elinor and her friends want to bring Ms. Mole a cupcake for her birthday.

Alma and her friends try to help Howard get over his fear of pigeons; Alma is invited to have dinner with André and his dad.

Molly rushes to find a new gift for her new friend, Kevin; Grandpa Nat's new drone is swept away by a dust devil.

Ronald, a meticulous, rule-following pig, and Roxy, a free-spirited musical hedgehog, explore the "wows" of one of America's most extraordinary places -- Sequoia National Park.

Honey glazed pork belly, arrachera and shrimp fried rice.

Pupusas with curtido; soda makers; fried yuca.

Hawaii, the most remote island chain in the world, is home to a wealth of wildlife, from humpback whales to waterfall-climbing fish.

Onsite extraction of fossils of an ichthyosaur, a fish lizard that ruled during the time of the dinosaurs, and a 3-D reconstruction of the creature; host David Attenborough.

Richard helps a homeowner replace components of his pedestal sink; Heath discusses bathroom vent fans; the team shares home inspection nightmares; Tom explains how to clean dirty tile grout.

A detailed look into news stories from around the world from the BBC news desk in Washington, D.C.

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

Coverage from Washington, D.C. and London, with a regular panel of guests from across the political spectrum discussing the biggest stories of the day.

Exploring the backstreets of Cairo on a tuk-tuk; baking pita bread; chiseling a tombstone; King Tut's gold; the ancient Sphinx; climbing to the center of a pyramid.

Exploring seven animal songs found in nature and their significance in the lives of their species, from the song of the largest lemur to the song of the humpback whale.

Paleontologists uncover a whole new species of whale in a parched valley not far from Cairo.

Stories of people setting a new standard for aquatic wildlife protection, from the reefs of Indonesia to an Idaho beaver dam.

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

Exploring seven animal songs found in nature and their significance in the lives of their species, from the song of the largest lemur to the song of the humpback whale.

Father Brown investigates when his old friend, Blind 'Arry, is arrested for murder.

Nikki continues to try to identify the last of the remaining bodies, in an effort to uncover any connections and find a motive; Jack and the police begin to look into several two-decade-old missing-persons cases.

The killer is still at large, and Cora hunts down her main suspects while the police are stumped.

Paleontologists uncover a whole new species of whale in a parched valley not far from Cairo.

Traveling across China and the American South to reveal the ancestry of novelist Amy Tan and poet Rita Dove.

Arthur helps D.W. prepare for a bikeathon; Francine whips Arthur's baseball team into shape.

Omni and Onom must track down a mysterious creature with a peculiar habit; Orli has to help new recruit Osric complete his training.

Decoding the secret language of dolphins.

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

Everett faces his fear of water by taking a swimming lesson; Lyla doesn't want Miss Emmaline to move.

Carl thinks his potato display is the best idea to show his school spirit; Nico tries to join the Junior Nutty Buddy Nut Lovers' Club.

Prince Wednesday spills paint all over his pants and the floor but feels better after telling Teacher Harriet what happened; Daniel and Miss Elaina break her dad's old kite.

Phoebe and Jay use a checklist to guide them through their tasks; Jay creates his first comic book and learns about the importance of page order.

Big Bird is meeting Snuffy at Hooper's for lunch, and everyone decides to surprise him with a Snuffy-sized sandwich named after him, the Snuffwich.

The Wombats are excited for "Show and Tell" but Super might be too busy to attend; Louisa decides the Treeborhood needs a way to announce fun events.

The pals help Gameshow Gator make up a new game that everyone can play; Donkey and Panda remind each other that they can cheer themselves up when they're down.

Rosie, Jun and Grandpa Liu go to the Asian Market to buy more sweet potato buns; Rosie and Javi help Tia overcome her stage fright when she goes on a television cooking show.

While delivering chocolates, the kids learn that warmer temperatures can melt treats; the kids help Mr. Raccoon calm down when he is having a bad day.

Mr. Piragua Man names a new flavor after Alma; Alma wants to keep playing with balloon animals, but André doesn't want to play anymore.

Molly and Tooey make an exhibit to honor Big Sulky, Qyah's oldest tree, after a windstorm knocks it down; Molly and Tooey organize a Funny Face Competition.

Roberto Clemente encourages Xavier, Yadina and Brad to help however they can when the museum water fountain breaks on a hot day; Kristi Yamaguchi shows Yadina that it is ok to ask for help when learning how to roller skate.

Roasted charred chicken; super greens salad with oregano vinaigrette; sugar and cinnamon cookies.

Macarons with raspberry buttercream; gougeres.

Madagascar, the strangest and oldest island on Earth, has seen more unique wildlife than any other island.

Stephen Hawking prompts three people to think like philosophers as well as scientists as they assess why humans exist.

Mark helps a couple install a concrete paver patio; Jenn discusses the common elements she includes in outdoor kitchen designs; Tom and Kevin build a combination bench/shoe rack out of fir decking.

A detailed look into news stories from around the world from the BBC news desk in Washington, D.C.

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

Coverage from Washington, D.C. and London, with a regular panel of guests from across the political spectrum discussing the biggest stories of the day.

Exploring the Nile Valley from north to south, including the fabled city of Alexandria; pharaohs' tombs and temples in Luxor, Egypt; a riverboat cruise; Ramesses II's temple at Abu Simbel.