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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.

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

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

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.

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.

Elmo's bike is great, but Abby's bike might be even better; Tamir teaches Elmo how to deal with feeling jealous and to enjoy the things Elmo already has.

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.

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

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

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

Slow, controlled movements using exercise bands; an exercise using a large ball.

Author Denny S. Bryce talks about "The Trial of Mrs. Rhinelander" and how her development of characters transpired into women-centered writing.

Rachita makes a shocking discovery which has a huge impact on both her investigation and her personal life.

How dogs have been reshaped by evolution to become the perfect partner to humans.

Exploring the science and unexpected histories of "The Replacements," five animal and plant species that made allies of humans.

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

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.

Thomas extends a generous offer to Andy; the family hosts a powerful politician for dinner; Mary's suspicions take shape.

Rick Steves celebrates the top 10 festivals in Europe, including the Carnival in Venice, Italy, and the Scottish Highland Games.

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

Kevin, Zack and homeowner Ethan tackle demolition of the kitchen.

Heath upgrades pull-chain lights; patching a lawn with sod; best of "What Is It?" moments.