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Celtic Woman celebrates 20 years at The Helix in Dublin with special performances by founding members Chloë Agnew, Lisa Kelly, Méav Ní Mhaolchatha and Máiréad Nesbitt.

A behind the scenes look at "The American Revolution" with Ken Burns, Sarah Botstein and David Schmidt to learn about the production, which took nearly a decade to complete.

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

Behind the scenes with the cast and crew of "Grantchester" to explore how the series became a hit; featuring archival clips spanning 10 seasons and exclusive interviews.

Exploring European art from the High Middle Ages to the modern era, from soaring gothic cathedrals to the surreal world of Bosch, the revolutionary Renaissance and the works of Rodin, Monet, Klimt and Chagall.

As he grows into his role as heir, Matthew brings out the rivalry between sisters Mary and Edith; servants Thomas and O'Brien scheme against Bates.

Nebraska Public Media Sports captures the commitment and dedication it took the Husker Volleyball program to build a championship team in 2015.

The stories of women who helped win World War II, including those who risked their lives flying planes, served as American spies and in the all-African American Central Postal battalion.

Behind the scenes with the cast and crew of the three "Masterpiece Mystery!" series in which book editor Susan Ryeland reluctantly takes on the role of amateur sleuth.

Billy Joel's record-breaking 100th consecutive performance at Madison Square Garden; special appearances by Sting and Jerry Seinfeld.

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

The Mobile Unit tries to figure out who broke into Odd Squad's Top-Secret Security Facility to get the mega-computer; The Shadow tries to convince villains worldwide to join her Villain Network.

Martin and Chris try to rescue a foal who is separated from his mother by a rogue wave.

The Hunters find a stowaway in their picnic basket, a little furry dog.

Liana and Lyla put together a puzzle with more than 1,000 pieces; Lyla and Luke construct a train using household materials.

Sheldon can't wait for Carl to play his favorite beach game; Lotta and her friends search for Lotta's lost blanket.

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

On a hot day, Abby creates a snowman to keep her and Elmo cool; when they return from finding decorations, their snowman has vanished.

Malik learns the key to a successful "Brother Day"; Zeke and Louisa wait tables at the Eat 'N Greet after Duffy sprains her ankle.

A noisy penguin interrupts band practice; the pals work together to win Gator's latest game show.

Rosie and Javi transport a watermelon to the park for the family picnic; Rosie builds a dino cave for Iggy.

Fluttering moths distract the kids when they try to sing their new Sunny Summer Song; the kids give away peaches to their friends in Animal Town.

Alma and Eddie try to write a song in hopes of winning the Song of Summer Contest.

Molly thinks she has seen a rare Australian megabat; Travis helps Molly, Tooey and Trini earn their wilderness cleanup badge.

Ibn Battuta shows Brad that a change of scenery might help him finish his comic book story; Beulah Louise Henry inspires Yadina to keep working on her invention.

On a hot day, Abby creates a snowman to keep her and Elmo cool; when they return from finding decorations, their snowman has vanished.

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.

A Helen Hayes Verdura for Chanel cuff bracelet; a 1917 Boston Red Sox calendar; a 1904 Gandhi handwritten letter.

How a corner store improves the neighborhood for all; expressing gratitude with flowers; a recipe for poutine.

Leading gardeners, chefs and designers.

A team of forensic experts excavate a giant Pliosaur skull, the largest Jurassic predator ever known.

A unique site in southern England preserved rare traces of ancient ice age mammoths and Neanderthals; host David Attenborough.

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

Josh Groban performs many of his beloved songs as well as new material at London's historic Union Chapel.

The band Supertramp showcases hits from its hugely successful "Breakfast in America" album.

Dr. Steven Gundry reveals how many troubling issues -- brain fog, memory loss, anxiety, weight gain and neurodegeneration -- can all stem from a compromised gut.

Phyllis McGuire, Pat Boone and Nick Clooney host a trip back to the 1950s with a mix of live performance and archival footage featuring classic moments from artists such as Perry Como, Debbie Reynolds and the McGuire Sisters.

A look at the science behind the steak and the sizzle starting from gene selection and breeding to cuts and cooking methods.

Arthur prepares for a marble tournament; superstitions.

Captain O tells the story of when she faced Dottie Doubloon, who covered islands in polka dots; Orli must return a clam to its rightful home.

Martin and Chris explore why animals mimic the looks of others.

Benny becomes enamored with the mail carrier, and wonders how she delivers the mail in different weather conditions.

The Loops celebrate the day they met Stu; Liana finds crumbs on Louisa's pillow and accuses her of taking the last cookie.

Carl turns to his friends to help him organize his plushie collection; Carl loses his bouncy ball collection.

Daniel wants to go outside and play in the snow, but Dad Tiger says he must wait in bed until it is time to get up; Daniel wants to swing as high as Jodi at the playground.

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

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

Super hunts for a lost sticker while the Wombats collaborate on a new ending for an old "Sticker Monster" story; the Wombats teach Zeke how to count to 10.

Turtle-Lou opens a Speedy Delivery service; the pals have a sleepover at Bob Dog's house, but Donkey is unable to fall asleep.

Rosie decides to be a message delivery kid and deliver messages to her neighbors, but her messages get all mixed up; Javi temporarily loses his voice, so Rosie must help him recover before they perform their El Coco play.

Elinor, Olive and Ari get ready to go out and play in the snow; Elinor wants to learn how Velcro works.

Alma and Andre take a new friend, Beto, to a New York beach; Junior's sandcastle gets washed away by the tide.

Molly's camera breaks while she and Grandpa Nat are observing an active volcano; Molly and Tooey plan a bird-watching trip to celebrate winter solstice and Trini's birthday.

Michelangelo shows Brad that doing something well takes time; Dorothy Levitt explains that it's important to start with the basics when learning a new skill.

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

Daniel wants to go outside and play in the snow, but Dad Tiger says he must wait in bed until it is time to get up; Daniel wants to swing as high as Jodi at the playground.

An Elizabeth Peyton portrait oil circa 1987; a 2004 Tony Soprano tracksuit and script; a Corvette Stingray signed by Paul Newman.

Exploring Norway north of the Arctic Circle; a fjord named after a troll; how the tradition of ice sculpting is carried on in an Arctic hotel.

The hidden gems of Charleston; how global warming could lead to longer commutes; a behind-the-scenes look at the process of de-icing planes.

The design, construction and cultural impact of the Washington National Cathedral's "third great eye" -- the nearly 30 foot diameter stained-glass West Rose window.

The journey of self-taught artist James Michalopoulos, from his life as a New Orleans street artist to his streetscapes and record-breaking Jazz Fest posters.

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

Exploring the night sky with photographer Travis Novitsky as seen from Voyageurs National Park, the Boundary Waters Canoe Area Wilderness and Quetico Provincial Park -- areas that together comprise the world's largest designated Dark Sky sanctuary.

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

Dr. Daniel Amen maps the brain networks that drive physical and emotional pain and reveals his practical, brain-based strategies that help you feel better, think clearer and live more fully.

Celtic Woman celebrates 20 years at The Helix in Dublin with special performances by founding members Chloë Agnew, Lisa Kelly, Méav Ní Mhaolchatha and Máiréad Nesbitt.

The Smothers Brothers and Judy Collins host a look at the evolution of modern American folk music; performers include Glenn Yarbrough, the Highwaymen, the Kingston Trio and the Limeliters.

Behind the scenes with the cast and crew of "Grantchester" to explore how the series became a hit; featuring archival clips spanning 10 seasons and exclusive interviews.

Muffy sets out to find her long-lost imaginary friend; Francine is not invited to Catherine's 16th birthday party.

A new villain challenges the Mobile Unit; Odd Squad's tube system mysteriously shuts down.

The Kratt brothers want to fly with the peregrine falcon.

A foggy Halloween almost derails Corky and Lily's trick-or-treating.

Lyla and her siblings come up with a sandwich special for Loops Lunch; Lyla helps her mom build a vertical garden behind Loops Lunch.

Carl surprises Sheldon with a lemonade stand, but is confused when Sheldon runs off; Carl's caterpillars turn into butterflies.

Daniel and his family explore nature, watching a red bird build a nest; Daniel, O the Owl and Uncle X take a nature walk through the forest.

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.

Cinderella needs to tell time for the ball, but her clock is broken, so Nina, Abby and Rudy wonder what tool they can use to fix it.

The Wombats go on a quest to figure out all the elements that go into creating the perfect personal time routine; Zadie wants to make a really loud noise.

The pals each feel differently about a loud thunderstorm; Mama Panda teaches Donkey and Panda new hoop tricks.

Rosie volunteers to put Iggy to bed, but she has to follow his special routine; Rosie assists Crystal in her magic show.

Elinor is the new Clean Captain at school and takes things too far; Ari has a loose tooth.

Alma tells on Emi when she's doing something dangerous; Alma's friends won't try Aaron and Lucas' snacks.

Trini is determined to learn an ice skating move; Tooey and his brothers use tracking skills to find their dad in the forest.

Kofi Annan shows Yadina and Brad that finding a compromise can help everyone; William and Caroline Herschel show Xavier that by including Yadina in his magic show, it can make it even more fun.

Cinderella needs to tell time for the ball, but her clock is broken, so Nina, Abby and Rudy wonder what tool they can use to fix it.

Daniel and his family explore nature, watching a red bird build a nest; Daniel, O the Owl and Uncle X take a nature walk through the forest.

A 1953 D'Angelico guitar; a couture ball gown circa 1885; Larry Bird game-worn sneakers.

The home cooks put their own spins on a fellow competitor's recipe; the cooks present dishes inspired by a friend.

Rick Steves cruises the Seine, visits Sainte-Chapelle and takes a vibrant tour through Paris; the Louvre Museum; Palaces of Versailles; climbing the Eiffel Tower.

Lionel is nervous about the photo shoot for the cover of his new book.

Everyone is in shock when an eccentric woman moves into Daddy's bedroom, claiming to be his fiancée and the sisters' stepmother-to-be, and it's up to Hyacinth to break up the insane engagement and get rid of the woman for good.

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

Anthropologist Niobe Thompson travels the world to uncover how the relationship between humans and horses evolved.

Guitarist Joe Bonamassa plays a tribute concert in honor of Rory Gallagher in Rory's hometown of Cork, Ireland.

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.