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Four people on four continents face environmental change driven by climate change; as resources grow scarce, they witness shifts in wildlife behavior.

Thoreau returns to society, taking on roles as surveyor, scientist and abolitionist, and makes two more Maine trips; Thoreau writes with renewed energy as he faces a lifelong illness.

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.

George spends time with his new friend, Carl, who has Asperger's syndrome; D.W. and James ask their siblings to coach them through the pre-school swim meet.

The team learns about friction and how to slow down a moving object when a masked villain takes over the Mobile Unit van's computer.

On their annual laundry day, the Kratt brothers disagree on whether blue oceans or green forests are better; Aviva demonstrates how oceans and forests work together.

It's an exciting day for Lily and her family when they move into their new house.

Everett faces his fear of water by taking a swimming lesson; Lyla doesn't want Miss Emmaline to move.

Carl takes his friends on an "Amazing Smell Tour of Fuzzytown," but Lotta doesn't agree with Carl's list of the best smells; Carl and his friends go on a camping trip.

Daniel has many activities he wants to do with Juan Carlos, but Mom reminds him to ask his guest what he wants to do; Daniel can't wait to show Juan Carlos the Clock Factory.

Phoebe and Jay set a new record for the longest paper airplane fight; Phoebe and Jay learn how to build a stable pillow fort.

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.

Malik enters the Undergroundborhood to retrieve JunJun's favorite ball; the Wombats cheer up Buckley with balloons.

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

Rosie learns about a surprise for a sister, and tries to find out who that sister is; Rosie looks for someone to be her twin.

Honeybees disturb Elinor, Art, Olive and Koa during their picnic in the forest; the kids work together to move their dirt bike path so turtles can get to the water.

Alma wants to hang out with Eddie's friends, but doesn't like it when she starts to feel like a little kid; Junior becomes everyone's pretend little brother.

The kids create a new game called Mollyball; Molly convinces a travel guide writer to visit Qyah, so the village can be added to the guidebook.

Louis Pasteur helps Xavier with his volcano experiment project; Rachel Carson helps Brad figure out a way to help butterflies migrate.

Appraisals from the grounds of Winterthur Museum, Garden & Library in Delaware include a valuation of a $125,000 family treasure.

Some of the Amazon's secrets include boiling streams, crystal clear lagoons, pink river dolphins and a strange new reef.

From snowy owls in the high Arctic to honey buzzards raiding hornet nests in Taiwan, a look at the extreme ways in which raptors conquer the toughest habitats on Earth.

A daily news summary from Europe with anchor Brent Goff.

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.

Daily, in-depth coverage of the state legislature, and reports on the issues that affect taxes, jobs, schools and environment.

Parish chairwoman Lois Springfield is found dead in a theater, leading detectives to believe it is because of her hostility toward a drag show being organized.

Parish chairwoman Lois Springfield is found dead in a theater, leading detectives to believe it is because of her hostility toward a drag show being organized.

Gently and Bacchus investigate a very disturbed family after the body of young woman was found murdered.

Parish chairwoman Lois Springfield is found dead in a theater, leading detectives to believe it is because of her hostility toward a drag show being organized.

Parish chairwoman Lois Springfield is found dead in a theater, leading detectives to believe it is because of her hostility toward a drag show being organized.

Gently and Bacchus investigate a very disturbed family after the body of young woman was found murdered.

Stepping into Hercule Poirot's shoes in London and Devon; Alan takes part in a performance of "Witness for the Prosecution.".

Lena Mae Perry, 83, leads The Branchettes, a North Carolina gospel group.

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

Daily, in-depth coverage of the state legislature, and reports on the issues that affect taxes, jobs, schools and environment.

When an episode of Bionic Bunny is interrupted, Carl is the only one who can recall what comes next; Larry, the class bunny, wanders off.

The Mobile Unit tries to convince Soundcheck to get back together again.

The Wild Kratts are busy coloring eggs for Easter; the bros think an adventure can be to go find the real Easter Bunny; Chris thinks it's the snowshoe hare, while Martin thinks it's the jackrabbit.

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

Luke, Lyla and Everett test vacuums; Lyla makes cookies using substituted ingredients.

Carl blames Nico when his special crayon breaks and Nico blames Carl when his drawing rips; Lotta tries to learn to play the alto saxophone.

Jodi's asthma makes it hard for her to run around with her friends during a game of Splat Ball; Daniel feels left out when there's no room for him to play at the xylophone.

Phoebe and Jay use Miss Jean's field guide to identify their new butterfly friend; Phoebe gets courage to perform at the talent show.

Alan has many food deliveries to make at Hooper's and needs vehicles to finish them; Elmo, Charlie, and Rosita help Alan by riding their scooter and bikes to deliver food to customers.

When Bex removes her cochlear implant and hearing aid so she can go on the waterslide, Sammy and the Wombats find new ways to communicate; the Wombats love Leiko's new mural.

Donkey must wait for all her pals to get together before she can open a big present; Panda throws a party on Planet Purple to celebrate his mama's birthday.

Rosie, Javi and Uncle Steve use landmarks to get to Calvin's bakery; Rosie, Iggy and Javi lose their Easter eggs.

Ari tries to make the world's tallest toy block tower, but it keeps falling over; Elinor and Ari try to teach Ari's baby sister how to walk.

Alma and André help Junior write a story; Alma and Eddie surprise Nestor and Gloria.

A routine science expedition with Grandpa Nat and Nina becomes a rescue mission; Molly and Mom join Randall and his family in Sitka for their traditional canoe trip to Celebration in Juneau.

Willard Wigan shows Yadina that slowing down can help her make friendship bracelets more carefully; Maria Sibylla Merian shows Brad that he can have fun while waiting for flowers to grow.

Tiffany Studios Turtle-Back diver's lamp circa 1905; John George Brown's Making Houses of Sand Oil circa 1880; a Chinese silk dragon panel circa 1775.

The pressure is on Annika and the team after a phone with a recording of a drowning is handed into police headquarters.

Out of prison, the professor is eager to resume his work at the university and consultancy with the police, who need his help to investigate a series of unexplained deaths before more people die.

A daily news summary from Europe with anchor Brent Goff.

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 suspicious death interrupts the Easter celebrations in Grantchester, and Alphy uses the case as a distraction from his personal life.

Stonemason Andrew Knightley is pushed under a London Underground train during the morning rush hour; DI Max Arnold and his partner, DS Priya Shamsie, together build a picture of a lonely, devout, and troubled man but the killer is flesh and blood.

Investigator Alexa Crowe looks into a case of a woman shooting a stranger at Auckland Harbour.

On this episode, you'll hear rock n roll from Atlanta with the Last Chance Riders, an award-winning singer-songwriter from Plains named Andrew Greer, and blues rock from South Georgia with Katherine Ball.

Behind the scenes of the 1964 stage premiere of "Swan Lake," choreographed by Russian dancer Rudolf Nureyev.

In 1960s London, Vivien, a young Jewish hairdresser, discovers the 62 Group, an intelligence-gathering underground movement trying to stop the rise of the far right.

Stonemason Andrew Knightley is pushed under a London Underground train during the morning rush hour; DI Max Arnold and his partner, DS Priya Shamsie, together build a picture of a lonely, devout, and troubled man but the killer is flesh and blood.

Investigator Alexa Crowe looks into a case of a woman shooting a stranger at Auckland Harbour.