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Eliza investigates a foreign ambassador's death while partnering with a woman whose intellect and power mirror her own.

Tristan and Charlotte enjoy a romantic picnic at Beauvoir Manor; James checks in at Heston Grange.

As tension builds, the staff at the Walsingham Hotel rebel; Book discovers something quite curious in Captain Victor Orr's little black book.

Fern gets a cell phone; Brain does not want everyone to know that he was held back in kindergarten.

The agents track down missing monuments; the agents must determine who the real Oswald is.

Martin and Chris take Jimmy to a swimming tutor -- a sea otter named Coach.

The Hunters try to help an injured bird so it can join its friends migrating south for the winter.

Lyla and Luke clean Stu without a bath; Lyla and Ale find a way to protect the callaloo plants from stink bugs.

Fern gets a cell phone; Brain does not want everyone to know that he was held back in kindergarten.

The agents track down missing monuments; the agents must determine who the real Oswald is.

Martin and Chris take Jimmy to a swimming tutor -- a sea otter named Coach.

The Hunters try to help an injured bird so it can join its friends migrating south for the winter.

Lyla and Luke clean Stu without a bath; Lyla and Ale find a way to protect the callaloo plants from stink bugs.

Forrest can't wait to try everything at the Fuzzytown Friends Picnic, but gets into trouble when he is unable to wait his turn; Carl hosts a Super Blue Moon Sleepover.

Daniel and Grandpere hunt for buried treasure; Grandpere takes Daniel on a sunrise boat ride before the family heads back home.

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

Elmo, Tamir and their friends are making a Peace Tree to celebrate Martin Luther King Jr. Day.

The Wombats try to save Harvest Day as it becomes overrun by fog; Zeke tries to create stew that meets Mr. E's high standards.

Donkey accidentally breaks Grampy's favorite toy; Donkey and Panda play with a new Tater Buddy.

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

Elinor and her friends are inspired to build a nest; Elinor and her friends learn that it is good to eat different types of foods.

Alma gets jealous when Rafia and Lucas talk about their fun playdate; Alma can't decide if she wants to see a new movie.

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

Roasted bone-in chicken breasts; kitchen trash cans; baked potatoes.

Grilled flank steak with basil dressing; herb keepers; fresh tomato galette.

Danioni manages to find his way into Ainsworth's life by helping Cecil arrange a family heirloom's delivery.

An Asscher-cut diamond ring; a Maynard Dixon painting; a San Francisco Seals-signed baseball.

Music from the Roaring '20s accompanies the store's promotion of the Great Gatsby style.

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.

Exploring the family trees of musicians Lizzo and Flea.

Tracing the 1960s "Grand Alliance" of Black and Jewish communities in the fight for civil rights, highlighting activism, collaboration and the tensions that tested their solidarity.

Examining the Black and Jewish alliance from the 1970s onward, including political gains, global tensions, rising hate and the enduring lessons of solidarity.

The staff is unhappy with Mr. Grace's decision to open the store at 8:30 a.m.

Rome's rise through its art, including its supersized monuments, colorful mosaics and marble Caesars.

The story of how Frederick Douglass, a man born into slavery, became one of the most prominent statesmen and influential voices for democracy in American history.

Examining the Black and Jewish alliance from the 1970s onward, including political gains, global tensions, rising hate and the enduring lessons of solidarity.

The story of how Frederick Douglass, a man born into slavery, became one of the most prominent statesmen and influential voices for democracy in American history.

A Cartier sapphire pendant circa 1915; a 1963 C.F. Martin D-28 guitar and case; a Paul Revere Jr. silver pitcher and diary circa 1775.

An emerald, diamond and gold necklace circa 1875; New Orleans Jazz & Heritage Festival posters; a 1962-1966 Stewart "Smokey" Stover collection.

Muffy worries she is no longer needed when her friends plan a successful bake sale without her; Arthur stands up for Mrs. MacGrady.

The agents are called upon when a lost Baby Laser Chicken is found in the Austrian countryside; clocks stop working when the Odd Squad Timekeeper is struck with oddness.

Learn about the world of chameleons.

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

Lyla, Everett and her sisters build makeshift carnival games for their brother, Luke, using household and recycled materials; Louisa seeks help to create a special beat for her school presentation.

Muffy worries she is no longer needed when her friends plan a successful bake sale without her; Arthur stands up for Mrs. MacGrady.

The agents are called upon when a lost Baby Laser Chicken is found in the Austrian countryside; clocks stop working when the Odd Squad Timekeeper is struck with oddness.

Learn about the world of chameleons.

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

Lyla, Everett and her sisters build makeshift carnival games for their brother, Luke, using household and recycled materials; Louisa seeks help to create a special beat for her school presentation.

Arugula and Carl go on an adventure as archaeologists; Carl spots a UFO on Mother's Day.

Teacher Daniel plays school but his student, Baby Margaret, just won't cooperate; Daniel, Prince Wednesday and Chrissie play at the castle, but they just can't agree on what to play.

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

Elmo, Chris and their friends on Sesame Street dress up as dinosaurs; with help from Elmo's book, they learn facts about dinosaurs.

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.

Pastry chef Mary Bergin prepares a chocolate cake with creme brulee and a nectarine upside-down chiffon cake.

Elinor and her friends volunteer to help Mr. Raccoon put up a sign for his bakery, but the sign keeps blowing away; it's Plant Day at school and when Elinor gets a cactus, she's a little disappointed at first.

André avoids a spooky movie night; Alma, Eddie and Junior write a hero song for Papi.

Trini offers to puppy-sit Tooey's newest sled dog, Khi, but ends up teaching him some bad habits; Molly makes a book about female pilots.

Corned beef with vegetables; sherry vinegar; salt diffusion and nitrates; snickerdoodles.

Shashlik-style beef kebabs; ground cumin; adjaruli khachapuri.

The younger inhabitants of the hotel find ways to let their hair down; Cecil and Jack shake on a shady deal for the sale of the Ainsworth family heirloom.

Minnesota items first appraised in 2004 include one whose value is at its highest ever at $2-3 million.

The staff is unhappy with Mr. Grace's decision to open the store at 8:30 a.m.

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.

From an orca mother teaching her young to hunt blue whales to a Banggai cardinalfish protecting his young inside his mouth, ocean parents master dedication and intelligence to raise their young.

Exploring the revolutionary engineering behind the Eiffel Tower in Paris, which smashed the record for the tallest structure on Earth when it was completed in 1889.

What happened to Wolfgang Mozart's older sister and collaborator, Maria Anna, a musical prodigy in her own right.

The ladies' and men's departments must find a team to enter a ballroom dancing contest.

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

Tristan and Charlotte enjoy a romantic picnic at Beauvoir Manor; James checks in at Heston Grange.

What happened to Wolfgang Mozart's older sister and collaborator, Maria Anna, a musical prodigy in her own right.

Bill Graham handbills; a Galle Marquetry vase circa 1900; art deco travel posters.

Tracing the 1960s "Grand Alliance" of Black and Jewish communities in the fight for civil rights, highlighting activism, collaboration and the tensions that tested their solidarity.

Exploring the family trees of musicians Lizzo and Flea.

Arthur, D.W. and Buster build sand castles at the beach; Buster goes out of his way to avoid germs.

The team rescues a long-forgotten agent; Agent Orlando and the Mobile Unit solve a case.

Martin and Chris search for a creature with good hiding powers -- the stingray -- for a game of Creature Hide and Seek.

After a groundhog predicts more winter weather, Benny is convinced he will have snow on his birthday so he plans a snow-filled birthday party.

Lyla struggles to sleep and tries to figure out what is wrong with her sleep routine; Lyla tries to do her own hairstyle.

Arthur, D.W. and Buster build sand castles at the beach; Buster goes out of his way to avoid germs.

The team rescues a long-forgotten agent; Agent Orlando and the Mobile Unit solve a case.

Martin and Chris search for a creature with good hiding powers -- the stingray -- for a game of Creature Hide and Seek.

After a groundhog predicts more winter weather, Benny is convinced he will have snow on his birthday so he plans a snow-filled birthday party.

Lyla struggles to sleep and tries to figure out what is wrong with her sleep routine; Lyla tries to do her own hairstyle.

Carl and Nico argue over who gets Arugula as their magician's assistant; Sheldon tries to help Carl become a good listener.

Daniel doesn't want to go to the doctor because he has to get a shot; a thunderstorm scares Daniel and O the Owl.

Rosie finally gets the courage to go into the Fun House at the carnival, but then finds out she doesn't have enough tickets; Rosie goes to the pet store to get something for Crystal's new bunny.

Elmo tries to win a race without eating his sandwich, but learns that eating healthy food will give him energy; Cookie Monster tries to eat the sandwich for himself.

Malik and Zadie can't agree on how tidy to keep their bedroom; Zeke's friends build houses for the fairies who have moved in.

Daniel Tiger and Donkey Hodie meet for the first time in Someplace Else, and Daniel's special visit takes the new pals on a surprising adventure.

Rosie finally gets the courage to go into the Fun House at the carnival, but then finds out she doesn't have enough tickets; Rosie goes to the pet store to get something for Crystal's new bunny.

Elinor and her friends come up with a plan when lizards get in the way of Mrs. Beaver's new park bench; Elinor and her friends observe birds.

Junior gets frustrated when Alma distracts him from learning a dance; Alma wants to celebrate Chacho's birthday.

Grandpa Nat joins the kids on a night watch to determine what the mysterious light is in the sky; Molly and Tooey help Mr. Patak record a carving demonstration.

Host Bridget Lancaster shows host Julia Collin Davison how to perfect cheese and tomato lasagna; tasting expert Jack Bishop challenges Julia to a tasting of jarred anchovies; test cook Keith Dresser uncovers the secrets to garlic bread.

Grilled jerk chicken; grill brushes; smoked chicken wings.

Danioni gives a compromising letter to Bella's husband; the Ainsworth family heirloom goes missing.

An emerald, diamond and gold necklace circa 1875; New Orleans Jazz & Heritage Festival posters; a 1962-1966 Stewart "Smokey" Stover collection.

The ladies' and men's departments must find a team to enter a ballroom dancing contest.

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.

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.

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.

Three people with passion projects of their own, including artist Carel Pieter Brest van Kempen, a beekeeper and Nancy Holt's Sun Tunnels.

Mr. Grainger's temporary elevation to store manager causes drastic changes in his personality.

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