KETS-DT

A secluded waterfall in the mountains.

Stephen Hawking considers whether time travel is possible; ideas include DeLorean, atomic clocks, a giant black hole and a large swath of New York.

Stephen Hawking challenges three people to ponder the likelihood of alien life.

Pioneers from Guatemala to Japan share space with wildlife and restore the way we coexist and cultivate among the trees.

Onsite extraction of fossils of an ichthyosaur, a fish lizard that ruled during the time of the dinosaurs, and a 3-D reconstruction of the creature; host David Attenborough.

Exploring the quantum universe.

The slow and steady practice of hip opening and forward folds leads to a moving meditation and slow self-reflection.

Standing exercises to improve posture and stretch the chest muscles; floor exercises to strengthen the stabilizer hip muscles; isometric sit-ups work the entire torso.

Chris and Martin search for an obscure rain forest creature.

Rae takes on the job of photographer, learning to focus to capture perfect shots of a stunt motorcycle rider; librarian Dev discovers that grouping is a helpful strategy to keep books organized.

After feeling left out, Luke decides to switch places with Stu; the Loops kids throw a surprise party for their parents.

Dylan is excited to play his new game, but things take a turn when the game pieces fall into a floor vent; Carl is determined to get into the FuzzyWorld Book of Records.

Daniel and Miss Elaina don't want to stop playing when it is time for Quiet Time at school; Daniel finds something that will help him rest.

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.

Abby, Big Bird and Cookie Monster play against Gabrielle, Zoe and Elmo in I Wonder If We Can Use This, a game where they figure out if items can be used for something.

Daniel and Miss Elaina don't want to stop playing when it is time for Quiet Time at school; Daniel finds something that will help him rest.

Donkey wonders if she and her cousin can have fun together since they don't like doing the same things anymore; Panda thinks about how he is different from other pandas.

Things get out of control when Rosie starts a pet-sitting business; Rosie plays with a rock from Javi's rock collection.

Elinor and her friends surprise Ms. Mole for Teacher's Day; a pig named Rudy helps Elinor and her friends sniff out some truffles.

Alma helps Mr. Ramirez figure out what to do when he lets too many cats into his shoe shop; Alma tries to convince Howard to play stickball.

Abby, Big Bird and Cookie Monster play against Gabrielle, Zoe and Elmo in I Wonder If We Can Use This, a game where they figure out if items can be used for something.

After feeling left out, Luke decides to switch places with Stu; the Loops kids throw a surprise party for their parents.

Chris and Martin search for an obscure rain forest creature.

Green Bay Packers salesman's sample championship rings; Barbie dolls and wardrobe circa 1960; a 1977 Keith Haring Bean Salad lithograph.

Exploring the quantum universe.

Pioneers from Guatemala to Japan share space with wildlife and restore the way we coexist and cultivate among the trees.

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 panel of journalists provides reporting and analysis of the major stories emanating from the United States capital.

Based on the 1935 movie musical starring Fred Astaire and Ginger Rogers, "Top Hat" features dazzling choreography and period sets, with an Irving Berlin score featuring "Cheek to Cheek," "Let's Face the Music and Dance" and "Puttin' on the Ritz.".

Twenty-four hours a day, the latest national and international stories as they break.

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