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New evidence sheds lights on the life and mysterious collapse of Cambodia's ancient jungle city.

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

The roots of basketball pros Brittney Griner and Chris Paul.

Exploring the intersecting and diverging fates of the Black and Jewish communities up to the 1920s.

How carpet mills contaminated Southern communities with PFAS, with a focus on accountability and health impacts.

Pepe the circus flea tells Kate, Pal and Amigo his personal story; D.W. wants to be kissed.

The Mobile Unit comes in to help when the Odd Squad Mail Department becomes overrun with Pentagurps; Orla and Omar work with two back-up agents at Shmumber Farms.

The Wild Kratts help stranded penguins in the Arctic.

The Hunters head to a nearby mountain to learn about snow.

Lyla feels guilty when she causes a group project to break; Lyla's glider toy gets stuck in a big puddle.

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.

Daniel makes snow footprints his own way; Katerina is upset when she can't read like O, but she learns to read in her own way.

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

Frankie the worm wants to play with her cousins, but they moved far away.

The Wombats are excited for "Show and Tell" but Super might be too busy to attend; Louisa decides the Treeborhood needs a way to announce fun events.

Donkey and Panda deliver Grampy's piano to him after it was sent to Donkey's windmill by mistake; Panda wants to win the Bongo-lympics.

The Fuentes kids make a fort in the living room but disagree about what to put in it; Rosie and Javi build a car for a derby race.

Ari grows impatient waiting for ketchup; Elinor, Olive and Ari have to figure out how to expand their clubhouse to fit all the new members of The Explorer's Club.

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 finds a newt in her boot while exploring Wizard Island; Molly tries to return a rock to its rightful place.

Jackie Robinson shows Xavier that it takes courage to change something that isn't right.

New wide plank floorboards mimic the look of the original flooring; a soapstone sink is fabricated; reviewing the hot water system; a wood backsplash is added to the pantry and light fixtures illuminate the ell.

Easy grill-roasted whole chicken; milk chocolate chips; necessary specialty devices for the kitchen; skillet-charred green beans with breadcrumb topping.

Scientists and filmmakers explore the icy waters of Antarctica to observe how killer whales hunt.

New evidence sheds lights on the life and mysterious collapse of Cambodia's ancient jungle city.

The Mobile Unit comes in to help when the Odd Squad Mail Department becomes overrun with Pentagurps; Orla and Omar work with two back-up agents at Shmumber Farms.

Pepe the circus flea tells Kate, Pal and Amigo his personal story; D.W. wants to be kissed.

The Wild Kratts help stranded penguins in the Arctic.

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.

Animal parents balance risk and reward to raise their young in grasslands; wild dogs must control their teen pups for survival; an expecting langur learns parenting skills by babysitting.

Scientists conduct the largest animal communication study in history to see if innovative word buttons truly enable dogs to talk.

Professor Mark Horton takes a journey across Britain to prove real events and places inspired the chivalric myths of King Arthur and the court of Camelot.

A look at the origins of hip-hop and its first socially conscious hit -- "The Message" -- by Grandmaster Flash and the Furious Five in 1982.

The roots of basketball pros Brittney Griner and Chris Paul.

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

Animal parents balance risk and reward to raise their young in grasslands; wild dogs must control their teen pups for survival; an expecting langur learns parenting skills by babysitting.

Scientists conduct the largest animal communication study in history to see if innovative word buttons truly enable dogs to talk.

Professor Mark Horton takes a journey across Britain to prove real events and places inspired the chivalric myths of King Arthur and the court of Camelot.

John Hawks, Associate Professor, Department of Anthropology, UW-Madison, explores new DNA discoveries that show Neanderthals from Asia and Europe mixed into our ancestors' gene pool along with a previously unknown group called the "Denisovans.".

Arthur decides to sell old toys through his school's Website; the Tibble Twins want to take their grandmother out to dinner.

A Sandbeast makes things difficult when Little O attempts to record a training video for kids interested in becoming Odd Squad agents.

Chris sets up a massive cross-country race in the North; each team member sets off across the tundra with little more than one form of transportation and a small pack of gear.

Lily and her family discover a surprise and also embark on a weather hunting expedition.

Lyla overcomes her fear of rock-climbing; a riddle game about everyday objects made by Black inventors.

Carl and his pals are excited about trick-or-treating until Forrest shares a spooky rumor that Mr. Price is a wizard who turns kids into chicken noodle soup.

Daniel and Katerina have to make their own noisemakers when Margaret wants her rattle back; Daniel, Prince Wednesday and Miss Elaina create a pretend neighborhood.

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

Rudy is afraid of getting a shot at the doctor's office, so Nina and Abby play pretend to show what the visit will be like so he can feel less scared.

It's Backwards Day in the Treeborhood; Cece, Carly and Clyde have fun with patterns.

Donkey and Panda compete in the Breakfast Bowl; Donkey, Panda and Bob Dog plant Dancing Dandelion seeds and look for the right music to help the flowers grow.

Iggy wants to see the garbage truck, but Rosie doesn't know how to get it to come to their house; Rosie attempts to bring nature inside.

Pinkalicious can't wait to make valentines for her class party, but Cupid offers her a trade that turns her plans upside-down.

Molly and Trini gather supplies to make suncatchers for their friends, but they lose the beads on the way home from Nenana; Molly wants to surprise Mom with a pair of traditional beaded slippers for her birthday.

Xavier and Brad turn to Florence Nightingale for help with curing Yadina's hiccups; George Washington Carver explains the importance of plants.

The modest 1720s gambrel has been restored, complete with a new ell and barn element; the crew gets a tour of the changes.

Tuscan grilled pork ribs with grilled radicchio; honing rods; why mushrooms absorb so much oil; sauteed mushrooms with red wine and rosemary.

Global conservationist Dr. M Sanjayan is in California, as it suffers the longest dry period in a thousand years.

Dr. M. Sanjayan explores seven of Earth's bellwether biomes.

A Sandbeast makes things difficult when Little O attempts to record a training video for kids interested in becoming Odd Squad agents.

Arthur decides to sell old toys through his school's Website; the Tibble Twins want to take their grandmother out to dinner.

Chris sets up a massive cross-country race in the North; each team member sets off across the tundra with little more than one form of transportation and a small pack of gear.

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.

Emmy Award-winning host John McGivern showcases great American main streets from interesting communities all over the Midwest.

Stories behind the foods we eat.

After a pet detective turns up dead inside the kennel of a dog he was searching for, Barnaby and Winter are drawn into the world of dognapping, cat seduction, and animal investigation.

Alexa straps on an apron and goes under cover when culinary student Ivan Zhang is found dead in the school's kitchen after allegedly slipping on oil and smacking his head.

Stanley Nelson's syncopated voyage through the history of funk music, from early roots to 1970s urban funk and beyond.

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

Emmy Award-winning host John McGivern showcases great American main streets from interesting communities all over the Midwest.

Stories behind the foods we eat.

After a pet detective turns up dead inside the kennel of a dog he was searching for, Barnaby and Winter are drawn into the world of dognapping, cat seduction, and animal investigation.

Alexa straps on an apron and goes under cover when culinary student Ivan Zhang is found dead in the school's kitchen after allegedly slipping on oil and smacking his head.

Arthur and Muffy have their birthday parties on the same day; Francine becomes a prima donna when she stars in the school play.

Number villains work against the Odd Squad; villains determine how to defeat the Odd Squad.

The Wild Kratts search for the snub-nosed monkeys in the Chinese mountains.

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

Lyla and Ale make an escape-proof container for her pet tarantula; rain keeps the kids inside, so they recreate park activities indoors.

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 his friends dance, sing and tell jokes that show their love and care for each other; Daniel hides hearts around the house to show his love for Grandpere.

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

Grover and Cookie Monster learn all about how to take care of a kitten.

The Treeborhood is alive with sound patterns; Zadie loses one of Louisa's toys.

Donkey hosts Gator's game show for a day; Donkey joins the Balance Ball team but feels uncomfortable doing something new.

Rosie and Papa switch roles for the day, but it's trickier than they thought; Rosie tries to make a family tree for Valentine's Day.

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

Rafia and Alma have trouble ice skating; Alma helps Junior find his missing tooth.

Molly and Tooey are confused when Trini refuses to join the basketball team because of polar bears; Molly's trip north to surprise Nina for her birthday is jeopardized by a moose blocking the runway.

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.

Tommy and Kevin cruise around Brookline, Mass., in a '57 Chevy before rolling up to the latest project: a lackluster 1957 mid-century modern house in need of a total overhaul; they learn about the full scope of work, and Charlie starts in on demo.

Hosts Bridget Lancaster and Julia Collin Davison make a plum-ginger pie with whole-wheat lattice-top crust; small stand mixers; pear crisp.

A look at the life of Princess Margaret, whose life and loves reflected the social and sexual revolution that transformed Britain during the 20th century.

The early married life of Princess Margaret and her husband Anthony Armstrong-Jones in the 1960s, as major social changes take place in Britain.

Number villains work against the Odd Squad; villains determine how to defeat the Odd Squad.

Arthur and Muffy have their birthday parties on the same day; Francine becomes a prima donna when she stars in the school play.

The Wild Kratts search for the snub-nosed monkeys in the Chinese mountains.

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

Events in Wisconsin.

Gently and Bacchus investigate the suspicious death of Gently's old friend, China.

A 30-year-old skeleton washes up on the shore, and the victim has a very personal connection to Pearl; Pearl's budding romance with Mike is threatened when he identifies a suspect close to home.

Edina battles business competitors while Patsy attends a meeting of Menopause Anonymous.

For better or worse, Jess and Sunny finally get the truth from Asif, Marty, Mel, and Juliet, and Gerry Cooper's killer is revealed; both on and off the case, the truth leads to difficult decisions.