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A team of archaeologists researches the "desert kites," the stone megastructures across northern Saudi Arabia and southern Jordan.

Battling for dominion over the river with crocs; catching glimpses of an ultra-rare mangrove snake and an endangered nabarlek wallaby; humpback whale mothers raise their calves in the ocean; false killer whales.

A new awareness of nature helps to restore ecosystems from Panama to Mozambique; repairing man-made damage and restoring reefs, rivers and animal populations.

Lucy Worsley investigates the 18th century breakup of Britain and America, including the turning points that led to America's Declaration of Independence from Britain in 1776.

Actors Kristen Bell and Dax Shepard learn about their family histories, which includes stories of soldiers, settlers and criminals.

PhD candidates Kelsey Richardson and Teagan Reasch discuss their research and how federal funding cuts may affect the academic and science environments.

A little brown bat crash-lands into a plate of Jimmy Z's brownies.

Xavier and his friends meet American athletes Jackie Robinson, Billie Jean King, Jim Thorpe and Kristi Yamaguchi.

Carl's medium-sized fuchsia yo-yo goes missing from his collection; a rainy day changes Carl's pool day plans.

Daniel is afraid he does not look like himself when he wears a blue sweater; Daniel's teacher has a new hairstyle.

Phoebe and Jay are asked to bird sit; photo time leads Jay to an outfit disaster.

Elmo, Abby and Julia build a mini city while Grover helps Cookie Monster serve ice cream.

The Wombats organize the Treeborhood Talent Show; Zeke searches for a collection to call his own for the Treeborhood's Collection Bonanza.

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

Rosie and Javi's pirate adventure goes awry; Rosie has trouble choosing a job at the first Fun Club meeting.

Elinor and her friends need to find more paper for their storybook; Elinor, Ari and Olive learn about different ways that animals keep themselves clean.

When Alma and her family travel to Puerto Rico to visit Papi's family, Alma can't wait to dance Bomba on the beach; her dancing plans are put on hold when an unmarked package containing a beautiful Bomba skirt is dropped in front of her bisabuela.

Molly and Tooey join Nina and Olin on a cave exploration to find out how old Qyah really is.

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.

Daniel is afraid he does not look like himself when he wears a blue sweater; Daniel's teacher has a new hairstyle.

Carl's medium-sized fuchsia yo-yo goes missing from his collection; a rainy day changes Carl's pool day plans.

A little brown bat crash-lands into a plate of Jimmy Z's brownies.

Xavier and his friends meet American athletes Jackie Robinson, Billie Jean King, Jim Thorpe and Kristi Yamaguchi.

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.

The Terrible Three break into HQ intent on planning ultimate oddness; the Agents must close the containment units before oddness takes over the whole town.

Buster comes home from his world travels; a musical moose sums up Buster's concerns about fitting it.

Coverage from Washington, D.C. and London, with a regular panel of guests from across the political spectrum discussing the biggest stories of the day.

A detailed look into news stories from around the world from the BBC news desk in Washington, D.C.

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

A former socialite and a Lothario are found beaten to death by a river.

Barnaby and Troy have to solve a double murder when a feisty former socialite and a Casanova are found bludgeoned to death.

Raphaelle finds herself in hot water after she is connected to a murder.