KODG-LD

Archaeological investigations into the origins of democracy in Greece 2,500 years ago; mass graves and ancient ruins where tyrants were murdered shine light on the birth of a revolutionary form of government.

From New York to Kolkata, dicovering the surprising and beneficial ways urban wildlife transforms cities into thriving, shared ecosystems.

Visiting a different California state park each month.

A newly discovered waterfall inside the Whiskey Town National Recreation Area.

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

Rebecca Hall and Lee Daniels research their family histories.

Actor Michael Douglas and writer/director Lena Dunham explore their family roots.

British General Cornwallis struggles to pacify the southern states; supported by the French, a victory at Yorktown secures independence for the Americans.

Original American monuments and the stories behind American favorites, from the Vietnam Veterans Memorial to Confederate soldier monuments.

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

Actor Michael Douglas and writer/director Lena Dunham explore their family roots.

British General Cornwallis struggles to pacify the southern states; supported by the French, a victory at Yorktown secures independence for the Americans.

Original American monuments and the stories behind American favorites, from the Vietnam Veterans Memorial to Confederate soldier monuments.

Nature Cat wants to break the record for the world's tallest snow critter, but the snow fails to stick together; the heroes protect themselves from a hurricane.

Lyla and Luke create and act out variations on a fairy tale; Lyla, Louis and Stu track down a lost package.

Arthur gets a new piano teacher; Buster volunteers to sell candy for the band.

All the agents want a piece when a new room opens up in headquarters; when the tubes are down for maintenance, getting a villain back to headquarters proves difficult.

The brothers come across a marsupial opossum while searching for Chris' lost goggles in the swamp.

Benny's toy penguin is swept away by melting snow, transforming a day of sledding into an urgent rescue mission.

Lyla trains Stu to help at the diner; Stu learns how to ride a scooter.

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 and Dad Tiger go to the Dad and Me Camp-out, where they run into Katerina, who arrives with her mom; Daniel and Mom head to the Mom and Me Game Night.

Phoebe and Jay learn how to sort items; Phoebe and Jay learn how to make food labels, so everyone can participate in the potluck.

When Telly learns that earthworms are invited to Abby's garden party, his friends help him feel less scared.

Sammy plans a surprise Carnaval for his dad while Quique plans a surprise treat for his son; Malik performs a magic trick.

Bob Dog brings a ball to the Stuffie Playdate; Frannie Fox invites Donkey to her swamp, but she feels nervous about playing in it.

Ronald, a meticulous, rule-following pig, and Roxy, a free-spirited musical hedgehog, explore the "wows" of one of America's most extraordinary places -- Sequoia National Park.

While delivering chocolates, the kids learn that warmer temperatures can melt treats; the kids help Mr. Raccoon calm down when he is having a bad day.

On Alma's great-grandmother's 100th birthday, Alma wants to find Bisabuela the perfect gift; even though she can think of all kinds of things that Bisabuela likes, none of them are quite right.

Trini is discouraged because she can't add her own moves to the Lynx Dance; Molly hopes to catch a Yukon River king salmon.

An Italian hotel proprietor's autograph book; Margaret Keane "Big Eye" painting; collection of 1936-1939 Edward Weston photographs.

When Mike mysteriously leaves Brokenwood on other police business, Kristin leads the inquiry into a 1970s-themed party where several partygoers turn up dead.

A mysterious body draws Foyle into an intricate web of SOE espionage, where he must use all his ingenuity to avoid becoming fatally ensnared.

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

In Beacon Valley, explorer Ariel Waldman reveals hidden ecosystems that persist despite extreme conditions.

The story behind David Attenborough's wildlife documentary series "Life on Earth," which changed his life forever.

How discoveries over the past 50 years have revolutionized people's understanding of the universe.

From Kenya to Mexico, people and wildlife find a harmonious balance in Earth's most vulnerable landscapes.

In Beacon Valley, explorer Ariel Waldman reveals hidden ecosystems that persist despite extreme conditions.

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

The story behind David Attenborough's wildlife documentary series "Life on Earth," which changed his life forever.

How discoveries over the past 50 years have revolutionized people's understanding of the universe.

From Kenya to Mexico, people and wildlife find a harmonious balance in Earth's most vulnerable landscapes.

In Beacon Valley, explorer Ariel Waldman reveals hidden ecosystems that persist despite extreme conditions.

The crew helps the Bumblebee Queen prepare for growing season; the gang learns the history of an old oak tree.

Lyla trains Stu to help at the diner; Stu learns how to ride a scooter.

Muffy challenges Francine to be nice for one week; Arthur joins a gang.

Olive and Otto try to stop zeroes from disappearing; odd things happen to the Bears basketball team.

Martin encounters a lost colony of black-footed ferrets.

Corky is selected to make a presentation at school during a science day celebration, but humidity jeopardizes her project.

Lyla figures out how to do a magic trick with clues from Miss Emmaline; Luke finds a puppy.

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

Things don't go as planned when Daniel and Dad Tiger spend the day together; Daniel and Mom's day together includes turning her old wagon into a trolley.

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

Rudy feels angry when Abby asks him to share his toys, so his friends make a movie to show that sharing can be fun.

All aboard the Moo Moo Choo Choo; visiting great uncle Duper in the Windborhood; world's biggest whirligig blows away; helping great uncle Duper imagine how to build a new one.

Donkey babysits a baby yodel bird who won't take a nap; Donkey and Panda argue while playing superheroes.

Rosie and Javi get a new book, but it's in a different language; Rosie tries to form a club with her friends.

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, Eddie and Junior play a late-night game with Steggie; Alma decides she wants to play piano.

Molly uses Indigenous knowledge to spot a storm.

Mary Anning inspires Xavier and Yadina to continue working on a tricky art project; Charlie Chaplin helps Yadina cheer up Dr. Zoom.

A Lambert magician automaton circa 1900; Ray Bradbury archive; Fred Myrick scrimshaw tooth circa 1830.

Barnaby delves into the history of Midsomer Mere after a series of murders take place.

Mysterious financial losses lead the Post Office to fire and prosecute village Subpostmasters who are unable to prove their innocence.

A trip to Eureka with members of the Yurok tribe.

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

The Pacific campaign of the Battle of Okinawa involves an amphibious invasion of great scale.

Hitler's alpine retreat in Bavaria is fortified with 2,000 SS troops and protected by a high-level security system.