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The team faces a confounding puzzle when a passenger boards a flight to Dominica but is found shot dead on Saint Marie. The pilot and flight attendant deny seeing the victim, raising suspicions about what happened on the mysterious flight.

R&B singer-songwriter Ari Lennox performs songs from "Vacancy" alongside fan favorites "Soft Girl Era" and "Shea Butter Baby.".

String band New Dangerfield.

Willie Nelson, Waylon Jennings, Johnny Cash and Kris Kristofferson perform their hits in this 1990 concert at the Nassau Coliseum; songs include "Big River," "Me and Bobby McGee" and "Always on My Mind.".

A 2016 concert celebrates Kris Kristofferson; performers include Dierks Bentley, Rosanne Cash, Eric Church, Emmylou Harris, Jamey Johnson, Alison Krauss, Lady A, Martina McBride, Reba McEntire, Willie Nelson and more.

Performance footage of folk group Peter, Paul and Mary.

Fred Rogers visits potter Bill Strickland, expressing feelings through art.

The CyberSquad investigates a mysterious creature that tramples over Crestwood Park, leaving visitors too scared to enter.

Dev discovers that sorting recyclables takes careful attention; as campaign managers, Cora and Dev find creative ways to share their candidate's message in the race for Skillsville mayor.

Lily, Corky and Benny attempt to film their own weather broadcast, but need Great Grandpa Wallace's tools to create their weathercast.

Lyla and her sisters find a lost bag's owner; Lyla gets jealous when Ale gets attention.

Carl loves the new sweater his Pop Pop knit him, but it feels itchy when he wears it; Carl is nervous about his new school bus stop.

Daniel and his friends help rebuild Music Man Stan's scene after a gust of wind knocks it down; Daniel and his friends try new games at Fall Field Day.

After adopting an orphaned elephant online, Elmo and the Sesame Street gang go on an African safari, traveling to Kenya's Sheldrick Wildlife Trust to meet the elephant and the keepers who care for her.

Exploring Guernsey's bean Jar tradition, local farm stands and a rare heritage goat breed; white bean soup with homemade dumplings.

Sal Khan of Khan Academy shares his journey and mission to change access to education around the world.

Tacos de olla in Muzquiz; sunny side up eggs with salsa de chorizo; picadillo stuffed jalapeños tacos.

An intimate look at the traditional annual holiday in Mexico that honors loved ones who have passed away.

How the human brain, and those of clever animal cousins like the dolphin, evolved from the time when our ancestors were tiny senseless sea creatures.

After adopting an orphaned elephant online, Elmo and the Sesame Street gang go on an African safari, traveling to Kenya's Sheldrick Wildlife Trust to meet the elephant and the keepers who care for her.

Everyone faces decisions as war comes in September 1939; romance beckons for Tristan and Mrs. Hall; tuberculosis plagues Helen's farm.

It's Christmas and Siegfried must decide whether to protect Tristan at the cost of River's welfare; Mrs. Hall realizes she should face her feelings for Gerald.

Skeldale House is busier than ever while Tristan is away serving; James and Helen dream about the future; Siegfried offers support when Mrs. Hall takes a leap of faith.

Experts analyze prominent international affairs topics and America's role in a shifting world.

Cord Jefferson discusses writing and directing his debut feature, "American Fiction.".

Detective Fitzroy hires Eliza to look into a case of police corruption after he sees a colleague plant evidence on a suspect.

Jasper's new relationship is put to the test when a mysterious death arouses his suspicions.

Maigret investigates a young woman's death, putting himself directly in the path of people who will do anything to keep the truth hidden.

The police chase the other half of the stolen Brink's-Mat gold when it resurfaces; in Tenerife, John Palmer's successful timeshare business starts to attract unwanted attention.

A birthday party is planned for Robert, but Rose's contribution to the event surprises those above and below stairs, a new farming venture on the Downton estate comes with dramatic repercussions for Mary, and Edith receives troubling news.

Ana and Alberto's relationship suffers a setback when Raúl de la Riva discovers their romance; Raúl's takes measures that could endanger his own collection.

Celebrating Europe's art and creative geniuses, from Leonardo da Vinci to Vincent van Gogh; Florence's bold "rebirth" after Europe's medieval struggles; impressionist works of the late 1800s.

Rick Steves celebrates the value of exploring the world as he captures the joys and rewards of travel with visits to Guatemala, Ethiopia, Palestine and Iran.

After adopting an orphaned elephant online, Elmo and the Sesame Street gang go on an African safari, traveling to Kenya's Sheldrick Wildlife Trust to meet the elephant and the keepers who care for her.

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

Francine is excited about designing a model city for school; D.W. wants to keep a stray kitten.

After adopting an orphaned elephant online, Elmo and the Sesame Street gang go on an African safari, traveling to Kenya's Sheldrick Wildlife Trust to meet the elephant and the keepers who care for her.

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.

Prince Tuesday baby-sits for Daniel; the kids help Miss Elaina find her locket.

A Lettersaur is loose in Reader Valley; things go crazy when Mr. More uses Princess Presto's wand; The Shuffler has a new dance.

Phoebe and Jay use a checklist to guide them through their tasks; Jay creates his first comic book and learns about the importance of page order.

While Abby and Elmo work together to find a lost Bubble Bug, Grover and Cookie Monster stay behind to take care of the fairy garden's magical beasties.

The Wombats program the "Toy Maker" when Mr. E's shipment is delayed; the Wombats track down a ruckus, discovering many noises along the way.

Donkey and Panda must find their inner brave to get Bob Dog's favorite ball back after they lose it in Spooky Shadow Swamp; Donkey must find hidden instruments.

While trick-or-treating, Rosie and Javi try to avoid a pirate ghost who may be haunting the cul-de-sac; Rosie and Javi offer to help make Crystal's haunted house spooky.

Elinor learns how webbed feet help ducks and other animals get around in the water; Elinor and Olive plan a camping breakfast for Elinor's dad's birthday.

Alma must choose a best friend to give a friendship bracelet to; Alma helps Junior find his lost dinosaur.

Molly and Trini find baby hares in their butterfly garden; Molly and Tooey discover a missing cat in Qyah.

The team faces a confounding puzzle when a passenger boards a flight to Dominica but is found shot dead on Saint Marie. The pilot and flight attendant deny seeing the victim, raising suspicions about what happened on the mysterious flight.

Jasper's new relationship is put to the test when a mysterious death arouses his suspicions.

How forests and other plants absorb 1/4 of human-emitted CO2 each year; forest ecologists Dr. Sarah Keubbing and Dr. William Anderegg.

Journalists Bob Woodward and Carl Bernstein reflect on their early careers and how they came to report on the Watergate situation which led to President Richard Nixon's resignation.

In-depth reporting, interviews and analysis of big, breaking international news stories.

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.

Liza deGuia shares the stories of Back Alley Bread, Makina Café and Peeps Kitchen.

A guided tour of Zurich; Museum Fur Gestaltung; Felsenegg cable car ride; Mount Uetliberg; Hiltl, the oldest vegetarian restaurant in the world; Yonex Badminton Halle.

A 1933 "Duck Soup" movie poster; an 1867 Carl Haag watercolor; an Edward Gilpin watch circa 1670.

An Asscher-cut yellow diamond ring circa 1930; a Charles Rohlfs mahogany chair; a 1958 Picasso drawing with documentation.