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A French explorer makes an unprecedented discovery in Alexandria's harbor that could reveal new information about Cleopatra's reign and her connection with the goddess Isis.

Installing a generator hookup to a home's circuit board; asbestos and options for mitigation; fixing an insufficient lintel repair on an 1833 home.

The legacy of filmmaker and playwright Luis Valdez, a founding member of the Chicano Movement.

Tragedies and triumphs in the families of three men known for comedy -- Jimmy Kimmel, Norman Lear and Bill Hader.

Strengthening and stretching the ribs, shoulders and back while rebalancing hips and hamstrings.

Using poses to work the hamstrings, spine and shoulders; balancing on the buttocks and one leg.

While investigating exoskeletons, the Hercules beetle accidentally gets enlarged.

The Hunters find a stowaway in their picnic basket, a little furry dog.

Liana accidentally submits art that Stu made and feels guilty taking the credit for his work; Lyla and Luke perform an "Anansi" folktale puppet show.

Dylan realizes he doesn't love square-dancing; Carl teaches Nico how to ride a bike.

Daniel gets upset when Margaret spills juice on his stuffed animal Tigey; Daniel has a hard day at school.

Mr. More's bubble bath goes wrong when his super strong bubbles start trapping everyone; characters come out of a book and wreck the library; a Letter Fog causes chaos.

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.

Phoebe, Jay, Grandma Annie and Pete create the family's first recipe for Sunday greens; Phoebe and Jay are excited about their first campout in the courtyard.

The wombats invent a color game; Super invents a Piggyback rider.

Donkey and Panda search for Mooing Moon Moths; Bob Dog can't remember where he buried his boogie bone.

Rosie, Jun and Grandpa Liu go to the Asian Market to buy more sweet potato buns; Rosie and Javi help Tia overcome her stage fright when she goes on a television cooking show.

Beaver Corps protect beavers; black bears thrive in North Carolina; Florida beaches inspire artists; residents reconnect with the Mississippi.

Performances include Violin Concerto, Op. 14 by Samuel Barber, "Appalachian Fantasy" by Tessa Lark, selections from Old American Songs by Aaron Copland and Chorales for Brass & Percussion, Op. 35, No. 3 by Maria Newman.

Following nature's rhythms from fireflies at dusk to cicadas emerging after years underground; in the prairie, pollinators keep wildflowers blooming while ancient rocks shelter microorganisms and preserve echoes of vanished seas.

Marble Arch Caves; chef Glenn Wheeler; a remote island's rare black pigs; Carlton Cakes bakery; Castle Leslie.

Cajun turkey luncheon meat.

Adopting the characteristics necessary to create happiness.

Alma and Howard search for a Black cowboy in the Bronx; Alma and Junior open a play hair salon at home.

Otto and Oren compete to become Captain Fun; Olive and Otto consider what life would be like if they had different partners.

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

The kids learn the meaning of stories when they visit Olive's family in the rainforest.

A blackout leaves the residents of Elwood City without any electricity; Binky's baby sister doesn't want to learn how to walk.

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.

Featuring the art, history and cultural heritage of western Minnesota and beyond; funding for the production of Postcards comes from the Minnesota Arts and Cultural Heritage Fund.

Audrey Busch oversees hundreds of hydrangeas at the Minnesota Landscape Arboretum; when and how to prune hydrangeas to ensure maximum flower power in the garden.

Singer-songwriter Sienna Spiro performs highlights from her acclaimed debut album "Visitor.".

News. Reporting on the day's international news from London and from BBC correspondents around the world.

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