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Exploring the science and unexpected histories of "The Replacements," five animal and plant species that made allies of humans.

Sexual abuse cases at schools shake France; public funding helps keep rents affordable in Vienna; young Brits want to rejoin the EU; seniors choose shared homes over nursing homes in Finland.

This 30-minute international newscast produced by Japan's national public broadcaster NHK looks at the realities of Asia today. From the diminishing natural coral along the coast of Boracay to the recruitment efforts by The Republic of Korea to find foreign workers to offset its labor shortage and aging population, the documentary series offers in-depth, behind-the-scenes analysis of news and publ

In Canada, a baby turtle ventures through a forest in search of the lake where she will spend the next 50 years; a young bush baby in South Africa searches for a new home.

NASA's New Horizons probe captures the first-ever detailed images of the icy world of Pluto.

Wind River Wild Horse Sanctuary in Wyoming; how the natural world influences design in surprising and helpful ways; the Great Bear Rainforest in northwest Canada.

Costume designer Ruth E. Carter tours The Children's Museum of Indianapolis.

Exeter Cathedral is an awe-inspiring example of Gothic architecture; a team of experts try to rescue this building's medieval glass and remarkable stonework.

English troops mobilize to invade Quebec; the Treaty of Paris ends French occupancy in North America.

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

Oakley Wines enjoys newfound fame and welcomes a surprise visitor, while gala preparations take an explosive turn, putting the entire showcase at risk.

When a monk is found dead in a chapel kneeling in prayer, Patience and Frankie dig into the monastery's secrets.

As Alphy seeks redemption, Geordie's investigation into a local crook ignites a high-stakes siege; courage, love and sacrifice are pushed to their limits.

Book must race against time to uncover the truth before anyone else ends up dead; Jack gets an unexpected answer when he confronts Trottie and Book.

An attack on a climate activist involves a culprit with a shocking claim.

Ellie and Hardy bring a new suspect in for questioning; Ellie finds evidence on the suspect's premises; DC Katie Harford confronts Ellie and Hardy.

Exploring the Caribbean heritage of actors Liza Colón-Zayas and Delroy Lindo.

When a monk is found dead in a chapel kneeling in prayer, Patience and Frankie dig into the monastery's secrets.

As Alphy seeks redemption, Geordie's investigation into a local crook ignites a high-stakes siege; courage, love and sacrifice are pushed to their limits.

Tensions arise as Downton Abbey hosts a lavish Christmas party.

An all-standing beginner workout liberates every layer of connective tissue allowing for free and easy movement without pain.

A workout focuses on core strengthening, balance, finger dexterity and range of motion; short foot exercise.

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

Aarti Craft turns all the agents in Chicago into paper dolls except for two, Oxford and Rosalind, who avoid her powers and join the Mobile Unit to stop Aarti for good.

The miniature Kratt brothers get lost in a current of plankton, headed for the coral reef.

After a groundhog predicts more winter weather, Benny is convinced he will have snow on his birthday so he plans a snow-filled birthday party.

Lyla and her sisters find a lost bag's owner; Lyla gets jealous when Ale gets attention.

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 and Prince Wednesday make a lemonade stand together but disagree about how to hand out the lemonade; Daniel and Miss Elaina get mad when their sandcastle is knocked down by a wave.

Phoebe, Jay, Grandma Annie and Pete create the family's first recipe for Sunday greens; Phoebe and Jay are excited about their first campout in the courtyard.

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.

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 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.

Molly uses Indigenous knowledge to spot a storm.

Elinor gives Hazel some strawberry seeds to grow at home; the Exploring Club goes on a musical march in the forest.

Aarti Craft turns all the agents in Chicago into paper dolls except for two, Oxford and Rosalind, who avoid her powers and join the Mobile Unit to stop Aarti for good.

The miniature Kratt brothers get lost in a current of plankton, headed for the coral reef.

New exercises focus on the feet.

A golden sun bursts into the day.

Designer Donna Salyers of Donna Salyers Fabulous-Furs sells and ships faux fur coats, jackets, clothing and accessories to big retailers including Neiman Marcus, Saks Fifth Avenue and Bergdorf Goodman.

Exploring the Caribbean heritage of actors Liza Colón-Zayas and Delroy Lindo.

A bill of sale for a 17-year-old black girl; powder horn; handwritten score helps make "The Star-Spangled Banner" the national anthem; 1775 almanac.

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

Celebrating America's 250th birthday with moments from the show that shed light on the American experience; with reflections from Doris Kearns Goodwin, Andrew Young, Heather Cox Richardson, Bryan Cranston, Bob Woodward and Carl Bernstein.

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

A World War II WASP archive; a fire helmet and fire parade hat; a 1956-1968 Al Oerter Olympic collection.

Lewis M. Rutherford lunar photographs from 1865; a Patek Philippe & Tiffany platinum pocket watch circa 1910; Lynne Drexler oil paintings.

Kalief Browder's legacy expands via the poetry of his mother, Venida, in a poetic journey revealing how an individual's life and afterlife can transcend boundaries to ignite change.

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

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

Lewis M. Rutherford lunar photographs from 1865; a Patek Philippe & Tiffany platinum pocket watch circa 1910; Lynne Drexler oil paintings.

Kalief Browder's legacy expands via the poetry of his mother, Venida, in a poetic journey revealing how an individual's life and afterlife can transcend boundaries to ignite change.

When a monk is found dead in a chapel kneeling in prayer, Patience and Frankie dig into the monastery's secrets.

An advanced standing and floor workout that activates the muscle cells in the legs and full body to help improve agility.

The details of proper body alignment and core strengthening; using short foot in a sit-to-stand progression.

D.W. meets a cool 13-year-old girl; Buster switches bodies with Mr. Ratburn for a day and learns how hard it is to be a teacher.

During the town of Trifle's 100-year anniversary party, Ozzie and Onom must stop Tracey Trifler from covering it in trifle; Osric and Omni try to stop a Roman gladiator from causing ancient oddness.

The Kratt brothers use rattlesnake powers to find rare tellurium crystal.

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

Lyla and Luke clean their room with help from Stu; Stu learns how to play hide-and-seek.

Forrest makes too many plans on the same day; Carl and Arugula build an epic marble run but fail to get the marble to run.

Miss Elaina makes bandages that look like her skin color; Chrissie and her friends build a playground ramp, so Chrissie can climb to the top of the slide, too.

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

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.

It's all-hands on deck when Zadie and Malik retrace their steps to locate Zeke's beloved stuffy; when Zadie messes up Mr. E's shell garden, the key to fixing the pattern is JunJun's song.

Jeff Mouse, Donkey and Panda seek a hiding moth; Donkey makes up a song while she waits for Turtle-Lou to deliver her guitar.

Molly is excited to show visitors around Qyah, but they don't think she is "Native enough" for the job; Tooey's family throws a special celebration to honor his first catch.

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

During the town of Trifle's 100-year anniversary party, Ozzie and Onom must stop Tracey Trifler from covering it in trifle; Osric and Omni try to stop a Roman gladiator from causing ancient oddness.

The Kratt brothers use rattlesnake powers to find rare tellurium crystal.

Several ways to control breathing to efficiently distribute oxygen throughout the body.

A jockey at the Florida Agricultural Museum in Palm Coast talks about his 30-year career; Roger paints a portrait of the jockey.

Sewing complex blocks that make up the Carolina blooms quilt.

A World War II WASP archive; a fire helmet and fire parade hat; a 1956-1968 Al Oerter Olympic collection.

Hill initiates trade with Asia, transforming Seattle into a major port city; Hill faces Harriman in the Last Great Railroad War; Louis Hill develops Glacier National Park; Hill speaks about the environment and lobbies for war loans to allies.

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

Celebrating wine and how homegrown foods and beverages are a part of a people's cultural character.

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

Mapping the roots of actress Lizzy Caplan and comic Hasan Minhaj, moving from shtetls in Eastern Europe to farmlands in northern India.

The arrival of the International Space Station promises a new era of cooperation in space.

The history of the rocket, from its origin in ancient China to its use as a weapon of war; how adding hydrogen allowed rockets to carry astronauts to the moon.