Dr. Michael Merzenich reveals how to rejuvenate the brain and maintain cognitive fitness as one ages; host Maria Shriver.

Yoga instructor and pain specialist Lee Albert presents five exercises to eliminate the root cause of many painful conditions.

Traveling from Norway to Newfoundland just as seafarers did in A.D. 1,000 to get a sense of how the Vikings lived in the Americas; narrator Ewan McGregor.

A zipper factory; Prince Tuesday is left in Mr. Aber's care.

Tiny loses Shiny's favorite shell; Stacie Styracosaurus has a crown of horns on her head.

Nina, Elmo, Abby, Big Bird and Chris put on a play about Little Miss Muffet; Nina helps Big Bird find his role as playwright when he comes up with the idea of changing the ending to the story.

Daniel gets mad when he doesn't get a crayon box right away at the Crayon Factory.

Pinkalicious loses her voice on the day of the class concert; Pinkalicious and Jasmine take care of all their dolls after one gets hurt.

The kids create a new game called Mollyball; Molly convinces a travel guide writer to visit Qyah so the village can be added to the guidebook.

Xavier Riddle, his sister, Yadina, and their friend, Brad, meet heroes from the past -- from Eleanor Roosevelt to Leonardo da Vinci.

Andy learns about making great art in modest places when he makes a simple repair to the stairs in the family trailer; Carmen gets to know a ranger in the Tijuca Rainforest who appreciates the strength of butterflies.

The gang hopes to find a moth for Hal; Nature Cat and his pals learn about the importance of sand dunes.

After his pet fruit fly, Juice, dies, Jimmy wonders if any animal can live more than 100 years.

NASA's Cassini probe explores Saturn's icy rings and moons, capturing ring-moon interactions and revealing ingredients for life on the moon Enceladus.

The mezcal-producing fields of Oaxaca; Isthmus of Tehuantepec, where women dominate the native culture; Chiapas, a river town home to ancient peoples and an unusual carnival celebration.

Master gardener Ron Spendal studies mason bees; certain songbirds thrive in Oregon's old growth forests.

Ed Slott talks about how to protect savings to ensure a comfortable retirement.

Improving age-related skin concerns with do-it-yourself anti-aging treatments, products to tighten skin and simple dietary changes.

Dr. Mimi Guarneri blends modern science and ancient wisdom in a step-by-step program that addresses health, healing and longevity.

Blues vocalist Shemekia Copeland discusses her past, her music, and her mission to change the world.

Bicycling through Brancott Estate vineyards; te Pa Family Vineyards; Pelorus Mail Boat; Mills Bay Mussels; the World of Wearable Art; the peak of Mount Olympus; Abel Tasman National Park.

Dick and Angel prepare for their first paid event at the chateau.

Margaret receives an offer from Henry; Helen is distraught by the unfair fate of the Basts; the three families collide at a wedding; Henry's past is revealed.

The arrival of Miss Lambe's forbidden love causes Charlotte to question her opinion of Sidney; Clara witnesses a moment between Esther and Sir Edward that raises her suspicions about their relationship, with awful consequences for Esther.

Inspector Oskar Rheinhardt calls on Dr. Max Liebermann to help investigate the murder of a young woman and the mysterious circumstances that suggest a supernatural power may be to blame.

Valeria locates her mother at the home of her former cell mate and asks her to return home.