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Jean and Judy decide to pay Lionel a surprise visit while he lectures at a conference in Norwich, but the surprise is not a very welcome one and Jean finds Lionel staying with another woman.

Hyacinth's father has an accident on his bicycle while chasing the milkwoman.

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

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.

Exploring the quantum universe.

Pioneers from Guatemala to Japan share space with wildlife and restore the way we coexist and cultivate among the trees.

Ross tests out smart lighting; Tom helps a homeowner build a custom screen door; Richard gives advice on maintaining a washing machine; Mauro shares techniques to paint old 1960s wood trim.

News. Reporting on the day's international news from London and from BBC correspondents around the world.

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

Exploring the quantum universe.

Pioneers from Guatemala to Japan share space with wildlife and restore the way we coexist and cultivate among the trees.

A Cartier Art Deco Tutti Frutti clutch circa 1925; a Carl Kauba cowboy bronze circa 1900; a Sumerian cuneiform tablet.

An intimate portrait of the biodiversity of the Nebraska Sandhills.

Jamie Chung, Cyndi Lauper and Danny Trejo retrace the journeys of their immigrant ancestors.

Arthur can't come up with a jingle for a cereal contest; D.W. struggles to do cartwheels as well as Emily.

Olive and Otto investigate why things are disappearing all around town; one of the four Debbies from Debbie's Pizzeria disappears.

Chris, Martin and Aviva need osprey creature powers to find keys that Jimmy dropped in the ocean.

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

Lyla gets a strike her first time bowling but gets frustrated when she realizes bowling isn't as easy as she thought it was; Lyla feels left out when Everett and Ale's friendship thrives.

Carl doesn't know what to do when Nico falls; Carl learns a new word -- shindig.

Daniel gets mad when he doesn't get a crayon box right away at the Crayon Factory.

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

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.

Zadie earns Junior EMT status and follows Ellie on her EMT calls; the Wombats bake a boat-shaped birthday cake.

Duck Duck learns how to fix her broken bookcase; Donkey welcomes Greeble the Treeble to Someplace Else.

Rosie puts on a concert when Tia is unable to get tickets to see her favorite singer; Rosie loses her first tooth, and prepares to welcome both the Tooth Fairy and the Tooth Mouse.

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

Alma and Junior teach Uncle Nestor how to ride his first bike; Papi lets Alma go to the grocery store by herself.

A heat wave hits Qyah and Molly is determined to find out the highest temperature on record; Molly and Trini must save Qyah from a wildflower.

Xavier and Yadina overcome a sibling spat with the help of Confucius; Sacagawea helps Xavier and Brad realize that just because Yadina is younger, she can do more than they think.

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.

Daniel gets mad when he doesn't get a crayon box right away at the Crayon Factory.

Green Bay Packers salesman's sample championship rings; Barbie dolls and wardrobe circa 1960; a 1977 Keith Haring Bean Salad lithograph.

A springtime cactus surprise.

A walk through a thick, dense forest after the rain.

Rugby legends Phil Vickery and Martin Offiah take to the antiques trail around Bristol; Phil swaps a rugby ball for a polo stick and Martin finds out about man's first ascent into the skies.

The connection between the consumer and maker and the value of hand-crafted objects.

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

Panel of experts answer lawn & garden questions.

Jeremy trips over the dead body of a young woman after sleeping on the cruiser.

Lawn mowing basics; how to vet and hire a trustworthy contractor to avoid costly mistakes; installing a concrete paver walkway.

News. Reporting on the day's international news from London and from BBC correspondents around the world.

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

Stephen Hawking considers whether time travel is possible; ideas include DeLorean, atomic clocks, a giant black hole and a large swath of New York.

Stephen Hawking challenges three people to ponder the likelihood of alien life.

Pioneers from Guatemala to Japan share space with wildlife and restore the way we coexist and cultivate among the trees.

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.

Exploring the quantum universe.

Sue Ellen becomes obsessed with an Internet game; the gang must decide whether to go on a camping trip.

Ozzi and Orli go on a mission to catch the villain who is ruining the Triangle Sisters' café; Opie must collect enough money to pay for Captain O's 10-layer birthday cake.

Chris and Martin search for an obscure rain forest creature.

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

After feeling left out, Luke decides to switch places with Stu; the Loops kids throw a surprise party for their parents.

Dylan is excited to play his new game, but things take a turn when the game pieces fall into a floor vent; Carl is determined to get into the FuzzyWorld Book of Records.

Daniel and Miss Elaina don't want to stop playing when it is time for Quiet Time at school; Daniel finds something that will help him rest.

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.

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.

Devonte J. Squirrel moves to the Treeborhood; Devonte and the Wombats create a machine that makes ice cream using a bike.

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.

Things get out of control when Rosie starts a pet-sitting business; Rosie plays with a rock from Javi's rock collection.

Elinor and her friends surprise Ms. Mole for Teacher's Day; a pig named Rudy helps Elinor and her friends sniff out some truffles.

Alma helps Mr. Ramirez figure out what to do when he lets too many cats into his shoe shop; Alma tries to convince Howard to play stickball.

Molly and Vera visit an excavation site, where they make a discovery; the Sassy Ladies of Saskatoon search for a glacier.

Grace Hopper shows Xavier that he will never know if he can build his robot differently than everyone else unless he tries; Itzhak Perlman shows Xavier that he can learn music his own way.

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.

Daniel and Miss Elaina don't want to stop playing when it is time for Quiet Time at school; Daniel finds something that will help him rest.

A Cartier Art Deco Tutti Frutti clutch circa 1925; a Carl Kauba cowboy bronze circa 1900; a Sumerian cuneiform tablet.

Grilling fresh catch over an open fire in Nes; porridge; king crab served with barley risotto and roasted vegetables.

Creole white beans and shrimp; smoked hog sandwiches with slaw; cochon de lait.

Exploring the story behind the Golden Gate Bridge, a symbol of America's can-do spirit.

Site where a bridge may have been burned during the Civil War; stamp may be connected to a landmark civil rights case.

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

A panel of journalists provides reporting and analysis of the major stories emanating from the United States capital.

Based on the 1935 movie musical starring Fred Astaire and Ginger Rogers, "Top Hat" features dazzling choreography and period sets, with an Irving Berlin score featuring "Cheek to Cheek," "Let's Face the Music and Dance" and "Puttin' on the Ritz.".

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

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