WGBH-DT

Greg O'Brien, an award-winning investigative reporter that wasdiagnosed with early onset Alzheimer's at the age of 59, demonstrates his commitment to starting conversations about this quiet killer that impacts millions worldwide.

Mary Berry travels to her mother's homeland, Scotland, to cook a Christmas holiday feast with her friends Andy Murray, Iain Stirling and Emeli Sandé.

Going behind-the-scenes with "America's Test Kitchen" hosts Bridget Lancaster and Julia Collin Davison to highlight the food, science and kitchen ingenuity that made the show's 25 years a success.

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.

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

The band performs in London; songs include "Everlong," "Monkey Wrench," "My Hero," and "Learn to Fly.".

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.

Aaron Tveit, Patrick Wilson and more perform songs from musicals by Rodgers & Hammerstein including "Carousel," "South Pacific," "The King and I" and "The Sound of Music.".

Tracking major changes in scientific understanding about Earth, from flat Earth legends to Galileo's telescope.

Moments in history that reshape the solar system and provide an understanding of the universe.

Andy Holiner teaches folk songs to children; Prince Tuesday learns that even fathers can make mistakes.

George's friends decide to throw him a surprise party; Fern helps an elderly neighbor and discovers his kung fu past.

Fashion designer Donita Donata captures fireflies to make a sparkly dress.

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

Lyla and Stu make a mess decorating cupcakes; Lyla tries to retrieve Everett's lost coin.

Nico is tired of being mistaken for her twin sister; Carl is upset when Nico breaks the Lint Dinosaur Monday rules and makes a Lint Monster instead.

It's bedtime but Daniel does not feel sleepy; Prince Wednesday and Daniel have a sleepover.

Rosie wants an ice pop from the Ice Pop Truck but she must come up with an extra dollar to buy it; Rosie can't decide what to buy at the mercado.

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.

Three stories about the power of gifts, including a woman who donates a kidney to a stranger and a woman who receives a gift from her father on the night of her first high school dance.

Gregorian performs traditional songs as well as "pure" acoustic versions of fan favorites, including "In Trutina" and "O Fortuna.".

Anton Ptushkin documents the work of Ukrainian citizens in rescuing and caring for the pets and zoo animals abandoned during the war in Ukraine.

Legends of 1960s and 1970s soul music perform their biggest hits; acts include The Temptations, James Brown, Patti LaBelle, The Chi-Lites, The Spinners, Sam Moore and more.

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.

Clips and behind-the-scenes memories of Christmas finales from "All Creatures Great and Small.".

Aaron Tveit, Patrick Wilson and more perform songs from musicals by Rodgers & Hammerstein including "Carousel," "South Pacific," "The King and I" and "The Sound of Music.".

Festive European culture includes the Bastille Day celebration in France, royal pageantry in London and running with the bulls in Pamplona, Spain.

Kitty's personal confrontation with the past sends Weyse into a rage; the best kept secret in the hotel is suddenly revealed.

André Rieu and his Johann Strauss Orchestra perform in Maastricht, Netherlands; music includes Verdi's Triumphal March of Aida, "Dancing on the Stars," a singalong of "Sweet Caroline" and "The Blue Danube.".

The Beatles race against the clock to record and release their album, "Rubber Soul.".

The cinema captures the imagination of the Viennese public in 1908; when tragedy strikes at a film premiere, Max and Oskar investigate the murder of a famous actress -- a former patient at Max's hospital.

The search for the killer of a screen star confounds Max and Oskar as they are led into a web of political intrigue.

An animated series based on Marc Brown's books chronicling the third-grade adventures of Arthur and his friends.

Olive and Otto help Santa find his reindeer; Oscar helps Ms. O get off Santa's naughty list.

A baby elephant almost destroys the Tortuga headquarters.

Dot and Al announce the Hunters are spending Christmas in Nigeria, and Corky wonders if she can have a fun Christmas without snow.

Luke plays doctor with Stu as a nurse and Lyla pretends to be different patients; Lyla, Everett, Luke and Stu build an elaborate track to get a tennis ball down to the lobby.

Carl's favorite sour pickle scratch-n-sniff sticker loses its smell; Carl notices that his baby blanket, Knit-Knit, has a hole in it.

Daniel and Prince Wednesday are afraid to go sledding when they see the hill's height; Daniel dances in "The Nutcracker Ballet.".

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.

Elmo, Grover, and all their friends help Charlie build a Little Library for her Mitzvah Day project for her synagogue. Helping neighbors share books is Charlie's way of making the world a kinder place.

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

Grampy asks Donkey to take Gregory for a walk, but Gregory won't move; Harriett Elizabeth Cow wants her pals to try her invention -- the Bounce-a-rino.

Ms. Penny shows the class how to make origami stars; Pinkalicious and Kendra compete against Peter and Robotta in a scavenger hunt.

The kids take a field trip to a cloud forest and learn that clouds have water in them; the kids learn how crayons are made.

Alma must learn a new way to celebrate when her family's Noche Buena traditions don't go as planned; Alma decides to make a do-over gift for Junior.

Molly, Tooey and Trini find an enormous tusk while playing by the river; a glacial outburst flood threatens to wash way Auntie Cecilia's old fishing cabin.

Alvin Ailey shows Yadina that music and dance can help bring people together; Xavier learns that his imagination can keep him company when he feels lonely.

A look at the documentary series by Ken Burns that illustrates how the American Revolution came to life.

André Rieu and his Johann Strauss Orchestra perform in Maastricht, Netherlands; music includes Verdi's Triumphal March of Aida, "Dancing on the Stars," a singalong of "Sweet Caroline" and "The Blue Danube.".

Lee helps a homeowner plant a row of arborvitae trees for a privacy border; Mark breaks down the various tools that can be found in the average fireplace set; Tom and Kevin demonstrate how to build a storage rack for container totes using 2x4s.

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 regular panel of guests from across the political spectrum discuss the biggest international stories of the day, along with news-making interviews and analysis from BBC correspondents around the globe.

A journey across France showcases the craftsmanship and cultural charm of the country's most remarkable artisans.

Filmmakers Ken Burns and Dayton Duncan reveal behind-the-scenes stories about the making of "The National Parks: America's Best Idea.".

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

Twenty-four hours a day, the latest national and international stories as they break.

Exploring ancient Roman cities from England to Turkey, including their art, aqueducts, theaters and churches.

The closing of a public garden sparks a series of murders.

Mike and the team try to figure out if the killing of an animal activist on the first day of duck hunting season was accidental or something sinister.

Matt Groening artwork; Charles Loloma bracelets; Evel Knievel's leathers.

Appraisals include a 1976 Mark Hamill-signed Star Wars poster, a 1979 Bob Ross landscape oil and a 1973 Iditarod Race sled.

Installing an 1800s antique pocket door with reclaimed hardware; building a Shaker-style-inspired end table; the technological advancements in induction cooktops.

Arthur's snow shoveling business is booming, until Buster decides to compete against him; Brain wakes up to find he is a cockroach.

Ozzie and Orli think they know who is responsible when the museum reports missing shapes; Miss Information uses bar graphs to spread false data.

Martin and Chris search for hispid hares in a wintery North American forest.

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

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

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.

Daniel isn't feeling well and is forced to miss Prince Wednesday's birthday party; Dad and Daniel help out when Mom Tiger gets sick.

Rosie is so excited to celebrate Christmas with abuela in Mexico City that she forgets to bring her present.

Grover tries to cheer up Elmo, who is feeling sad after his dad leaves for a work trip.

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 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.

Pinkalicious and Peter make a time capsule with their friends; Peter has some bad luck.

Elinor, Ari and Olive play Snow Tag with their new friend, Gael the lynx; Ari makes friends with a rock.

When Alma and her family travel to Puerto Rico to visit Papi's family, Alma can't wait to dance Bomba on the beach; her dancing plans are put on hold when an unmarked package containing a beautiful Bomba skirt is dropped in front of her bisabuela.

Molly learns how to make offerings, hoping to stop a volcano from erputing.

Brad is reluctant for Xavier and Yadina to read the comic he wrote because it's personal; Charles Dickens explains to Yadina that she doesn't need toys -- her imagination can make everything more fun.

A look at milestone albums of The Beatles and the stories that accompanied them.

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

Kevin visits Chicago to explore the dangers of home fires and ways to stay safe; Scott shows Kevin a battery-powered generator that can provide electricity; the guys look at a gray, rubber handle; Richard finds a rusted sink strainer in the kitchen.

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 regular panel of guests from across the political spectrum discuss the biggest international stories of the day, along with news-making interviews and analysis from BBC correspondents around the globe.

Greg O'Brien, an award-winning investigative reporter that wasdiagnosed with early onset Alzheimer's at the age of 59, demonstrates his commitment to starting conversations about this quiet killer that impacts millions worldwide.

A look at the documentary series by Ken Burns that illustrates how the American Revolution came to life.

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.

Twenty-four hours a day, the latest national and international stories as they break.

Diverse art produced by early Europeans, from Christians to Muslims and Byzantines to Vikings.