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Everyone faces decisions as war comes in September 1939; romance beckons for Tristan and Mrs. Hall; tuberculosis plagues Helen's farm.

It's Christmas and Siegfried must decide whether to protect Tristan at the cost of River's welfare; Mrs. Hall realizes she should face her feelings for Gerald.

Skeldale House is busier than ever while Tristan is away serving; James and Helen dream about the future; Siegfried offers support when Mrs. Hall takes a leap of faith.

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

Cord Jefferson discusses writing and directing his debut feature, "American Fiction.".

Detective Fitzroy hires Eliza to look into a case of police corruption after he sees a colleague plant evidence on a suspect.

Jasper's new relationship is put to the test when a mysterious death arouses his suspicions.

Maigret investigates a young woman's death, putting himself directly in the path of people who will do anything to keep the truth hidden.

The police chase the other half of the stolen Brink's-Mat gold when it resurfaces; in Tenerife, John Palmer's successful timeshare business starts to attract unwanted attention.

A birthday party is planned for Robert, but Rose's contribution to the event surprises those above and below stairs, a new farming venture on the Downton estate comes with dramatic repercussions for Mary, and Edith receives troubling news.

Ana and Alberto's relationship suffers a setback when Raúl de la Riva discovers their romance; Raúl's takes measures that could endanger his own collection.

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.

Rick Steves celebrates the value of exploring the world as he captures the joys and rewards of travel with visits to Guatemala, Ethiopia, Palestine and Iran.

After adopting an orphaned elephant online, Elmo and the Sesame Street gang go on an African safari, traveling to Kenya's Sheldrick Wildlife Trust to meet the elephant and the keepers who care for her.

A little brown bat crash-lands into a plate of Jimmy Z's brownies.

Francine is excited about designing a model city for school; D.W. wants to keep a stray kitten.

After adopting an orphaned elephant online, Elmo and the Sesame Street gang go on an African safari, traveling to Kenya's Sheldrick Wildlife Trust to meet the elephant and the keepers who care for her.

Carl takes his friends on an "Amazing Smell Tour of Fuzzytown," but Lotta doesn't agree with Carl's list of the best smells; Carl and his friends go on a camping trip.

Prince Tuesday baby-sits for Daniel; the kids help Miss Elaina find her locket.

A Lettersaur is loose in Reader Valley; things go crazy when Mr. More uses Princess Presto's wand; The Shuffler has a new dance.

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.

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.

The Wombats program the "Toy Maker" when Mr. E's shipment is delayed; the Wombats track down a ruckus, discovering many noises along the way.

Donkey and Panda must find their inner brave to get Bob Dog's favorite ball back after they lose it in Spooky Shadow Swamp; Donkey must find hidden instruments.

While trick-or-treating, Rosie and Javi try to avoid a pirate ghost who may be haunting the cul-de-sac; Rosie and Javi offer to help make Crystal's haunted house spooky.

Elinor learns how webbed feet help ducks and other animals get around in the water; Elinor and Olive plan a camping breakfast for Elinor's dad's birthday.

Alma must choose a best friend to give a friendship bracelet to; Alma helps Junior find his lost dinosaur.

Molly and Trini find baby hares in their butterfly garden; Molly and Tooey discover a missing cat in Qyah.

The team faces a confounding puzzle when a passenger boards a flight to Dominica but is found shot dead on Saint Marie. The pilot and flight attendant deny seeing the victim, raising suspicions about what happened on the mysterious flight.

Jasper's new relationship is put to the test when a mysterious death arouses his suspicions.

How forests and other plants absorb 1/4 of human-emitted CO2 each year; forest ecologists Dr. Sarah Keubbing and Dr. William Anderegg.

Journalists Bob Woodward and Carl Bernstein reflect on their early careers and how they came to report on the Watergate situation which led to President Richard Nixon's resignation.

In-depth reporting, interviews and analysis of big, breaking international news stories.

Live news program produced out of BBC's Washington, D.C. bureau; host Sumi Somaskanda.

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

Liza deGuia shares the stories of Back Alley Bread, Makina Café and Peeps Kitchen.

A guided tour of Zurich; Museum Fur Gestaltung; Felsenegg cable car ride; Mount Uetliberg; Hiltl, the oldest vegetarian restaurant in the world; Yonex Badminton Halle.

A 1933 "Duck Soup" movie poster; an 1867 Carl Haag watercolor; an Edward Gilpin watch circa 1670.

An Asscher-cut yellow diamond ring circa 1930; a Charles Rohlfs mahogany chair; a 1958 Picasso drawing with documentation.

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

Tracing the story of the Declaration of Independence from Thomas Jefferson's pen to movements for freedom around the world.

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

Rick Steves explores the German cities of Hamburg, Dresden, Leipzig, Frankfurt and Nuremberg, including their Baroque palaces, skyscrapers, riversides and beer halls.

Rick Steves explores the German cities of Hamburg, Dresden, Leipzig, Frankfurt and Nuremberg, including their Baroque palaces, skyscrapers, riversides and beer halls.

Lyla and Luke clean Stu without a bath; Lyla and Ale find a way to protect the callaloo plants from stink bugs.

Martin and Chris reveal some of the creepiest creature powers on the planet.

Martin and Chris reveal some of the creepiest creature powers on the planet.

After adopting an orphaned elephant online, Elmo and the Sesame Street gang go on an African safari, traveling to Kenya's Sheldrick Wildlife Trust to meet the elephant and the keepers who care for her.

Mr. More adds more syllables to the word "banana"; Alpha Pig and Wonder Red shrink; giant plants attack.

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

Director Grover has the perfect plan for his play; Tamir and Cookie Monster try to fix the suitcase.

Malik enters the Undergroundborhood to retrieve JunJun's favorite ball; the Wombats cheer up Buckley with balloons.

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

Rosie, Javi and Uncle Steve use landmarks to get to Calvin's bakery; Rosie, Iggy and Javi lose their Easter eggs.

Olive wants to organize something special for her mom's birthday; Elinor, Ari and Olive make spiderweb decorations for Ms. Mole's classroom.

Alma and her friends must vote for either a new board game or art supplies; Alma and Harper open a lemonade stand.

Molly teaches tourists how to fish responsibly; Molly helps Randall hide his long hair.

A 1933 "Duck Soup" movie poster; an 1867 Carl Haag watercolor; an Edward Gilpin watch circa 1670.

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.".

Election results arrive, a new board stumbles and a national election heightens the stakes; a roundtable clarifies what division does to children.

In-depth reporting, interviews and analysis of big, breaking international news stories.

Live news program produced out of BBC's Washington, D.C. bureau; host Sumi Somaskanda.

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

A bike ride along the Tahoe-Pyramid Trail and a visit to the Pyramid Lake Museum & Visitor Center.

Truffle hunters use time-honored methods; lacemakers craft delicate designs; ceramic artists shape vibrant works; olive oil and wine producers follow nature and knowledge.

Military service in the families of Patricia Arquette, Julianne Moore and John McCain.

Sharpshooter Annie Oakley finds fame in Buffalo Bill's Wild West Show.

A report on the rising fear of deportation among Haitians who fled to the U.S.

A Venezuelan family struggles to retain its legal status amid President Donald Trump's immigration crackdown; the uncertain future of those who fled to the U.S., including men who were sent to a prison in El Salvador.

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

Celebrating the life of Johnny Cash with a 2012 concert featuring Brandi Carlile, Kris Kristofferson, the Carolina Chocolate Drops, Ronnie Dunn, Jamey Johnson, Willie Nelson and more.

Frankie Laine, Julius LaRosa, the Four Lads, the Four Freshmen and Herb Reed's Platters are a few of the musicians who perform their hits of the late 1950s and early '60s.

Lyla asks customers for their leftover pumpkins, but then gets way too many; Lyla and Luke put their sisters, Liana and Louisa, through a babysitting test.

The Wild Kratts are on a mission to figure out the differences between African and Asian elephants; they soon discover that despite their differences, all elephants have lots in common, like feelings, emotions, and real intelligence.

Arthur and Buster work with Binky on an art project; Arthur becomes distressed when his lucky pencil keeps getting shorter and shorter.

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

Lyla asks customers for their leftover pumpkins, but then gets way too many; Lyla and Luke put their sisters, Liana and Louisa, through a babysitting test.

Carl and his pals are excited about trick-or-treating until Forrest shares a spooky rumor that Mr. Price is a wizard who turns kids into chicken noodle soup.

Daniel gets mad at Miss Elaina that he wants to push her, but then remembers the importance of self-control and how to stop himself from hurting a friend; Farmer Daniel gets mad when Margaret knocks down his fence.

Mr. More takes letter m's and makes more Mr. Mores; Alpha Pig's transforming shoes go haywire; Power Paige wants a Miss Mega comic.

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

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.

After adopting an orphaned elephant online, Elmo and the Sesame Street gang go on an African safari, traveling to Kenya's Sheldrick Wildlife Trust to meet the elephant and the keepers who care for her.

While trick-or-treating, Rosie and Javi try to avoid a pirate ghost who may be haunting the cul-de-sac; Rosie and Javi offer to help make Crystal's haunted house spooky.

The kids learn the benefits of eating different colored foods; Olive tries to get a picture of a puffin.

A dirty Chacho runs away at the park; Alma realizes that Frankie's old sneakers are more valuable than they appear.

Molly spends the night at Tooey's house when a blizzard strikes Qyah; Molly loses her fish charm bracelet in an ice hole.

Military service in the families of Patricia Arquette, Julianne Moore and John McCain.

Sharpshooter Annie Oakley finds fame in Buffalo Bill's Wild West Show.

Examining the life and accomplishments of Grenville M. Dodge, a Civil War general, and how his leadership on and off the battlefield helped preserve a fractured nation and drive the expansion that connected a continent.

In-depth reporting, interviews and analysis of big, breaking international news stories.

Live news program produced out of BBC's Washington, D.C. bureau; host Sumi Somaskanda.

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

An Oregon farm grows acres of bright tulips; Louisiana scientists work to solve the mystery of what's killing America's bees; picking and packing blueberries in Florida; Pennsylvania's "barn saver.".

The future of the agriculture industry and stories of how it touches us all far beyond the table.

Following the lives of two tiger mothers and how they raise their cubs on an island full of threats in the forests of western Nepal.

The surprising story of how our planet's diverse creatures became the furious feeding machines they are today.