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Unraveling the mysterious life of George Masa, a Japanese immigrant whose photographs helped define the identity of the Great Smoky Mountains.

A Cuban family adjusts to life in the United States.

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.

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.

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 installs a whole house water filtration system; Tom walks Kevin through various types of woods; Ross visits a hotel room that's powered by voice activation; Jenn Nawada installs a bluestone patio with a reclaimed granite fire pit.

The latest news from health journals and research institutions.

Medical experts on pediatrics, primary care, spine and back pain, pharmacy and emergency medicine are available to answer questions.

Scientists, patients, and families reveal how the brain adapts to trauma, disease, and challenges.

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.

Chef Michelle Bernstein hears diner's reviews of restaurants.

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

Palm Beach County teens create a film addressing issues important to them.

Profiles three female Japanese artists who are in various stages of their lives and careers.

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.

In the summer of 2014, a World War II veteran sneaks out of his care home to attend the 70th anniversary celebration of the D-Day landings in Normandy.

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

Vatican City, the world's smallest country; Monaco; San Marino, Italy; Liechtenstein; Andorra.

A Cuban family adjusts to life in the United States.

Palermo, Italy; the Romanesque cathedral of Monreale; Mount Etna; cannoli; Greek temples at Agrigento; Roman mosaics at the Villa Romana del Casale; the Greek theater in Taormina.

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.

Exploring the quantum universe.

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.

Lung cancer survivor Bonnie Addario tells her story of how she found hope and ways to help lung cancer patients and caregivers around the world.

Medical experts on pediatrics, primary care, spine and back pain, pharmacy and emergency medicine are available to answer questions.

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.

Creators exploring the connections between art, memory, and belonging. Featuring multidisciplinary artist Kristin M. Beck, textile artist Diana Eusebio, and a sonic installation at Locust Projects.

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.

The life and work of investigative journalist, civil rights leader and suffragist Ida B. Wells.

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

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.

Three young adults explore what health equity looks like at a community farm; spiritual well-being as it relates to cultural connection and heritage; adaptive equipment.

A Cuban family adjusts to life in the United States.

Fresh seafood at the fisherman's harbor in Cefalù, on the northern coast of Sicily; Siracusa; Capuchin crypt; agriturismo; a classic Sicilian banquet.

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.

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

Painter Mauro Henrique demonstrates a masking primer that leaves clean lines on a window; Richard tracks down the source of a clogged drain using some high tech equipment; Scott warms up a chilly bathroom by installing an electric convection heater.

The latest news from health journals and research institutions.

Medical experts on pediatrics, primary care, spine and back pain, pharmacy and emergency medicine are available to answer questions.

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.

Scientists study the Deepwater Horizon oil rig disaster and its impact on the Gulf of Mexico, using lessons learned to prepare for another big spill.

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.

How to rekindle romance with your partner, how medications can impair sexual performance, keeping your sex life going through the different trimesters of pregnancy.

Tasting okra seed oil at Oliver Farm; Jon Jackson's Motherland okra, grown for greens and cooked African style.

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