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The investigation into secret network of curators and dealers that made profits off art stolen by the Nazis.

Diamond and star sapphire jewelry; a 1952 Al Stohlman tooled leatherwork picture; Kenner "Star Wars" action figures circa 1978.

Gloria Hunniford and Angela Rippon join the Road Trip; along the way, they stage a rescue mission to stranded experts Paul Laidlaw and David Harper; Gloria hears the story behind a local landmark and Angela steps into the world of Virginia Wolfe.

Lucy Worsley investigates whether Mary I, England's first ruling female monarch, should be remembered as a pioneer or a tyrant.

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

Buster learns how to keep a secret; the gang finds a fortune telling game and gets a hint of what their futures might hold.

Chris and Martin find a black and yellow salamander crawling out of the fire in Germany's Black Forest.

The Hunters head to a nearby mountain to learn about snow.

Lyla gets a strike her first time bowling but gets frustrated when she realizes bowling isn't as easy as she thought it was; Lyla feels left out when Everett and Ale's friendship thrives.

Arugula and Carl go on an adventure as archaeologists; Carl spots a UFO on Mother's Day.

Prince Wednesday doesn't want to stop what he is doing to go to the bathroom; Daniel uses the bathroom at Music Man Stan's Shop.

Rosie tries to make tomorrow come faster so she can go to the Dino Park; Rosie looks for her missing walkie talkies.

At the Sesame Street Jazz Festival, Elmo and Zoe learn to improvise, listen to each other play and take turns.

Zadie must face her fear and go to the barber for a haircut; Malik discovers smart devices have limitations.

Cousin Hodie wants to play with Donkey on a tree swing; Duck Duck's new book club book is too huge for her and Donkey to read.

Pinkalicious and Peter build a snow alarm so they don't miss out on playing in the cold; Pinkalicious earns a ribbon for her good deeds.

Alma and her friends judge a Best Bronx food truck contest; Alma and Junior are excited to play restaurant in their backyard, until Howard opens a competing restaurant.

Hacker steals all the mushrooms from the Southern Frontier to accomplish his mission to glow in the dark, which harms the cybersite's meeting tree.

A scrap of metallic Mylar could be part of an early U.S. satellite; Andy Warhol's artwork could be on the moon; possible prototype for a NASA space boot.

Gloria Hunniford and Angela Rippon join the Road Trip; along the way, they stage a rescue mission to stranded experts Paul Laidlaw and David Harper; Gloria hears the story behind a local landmark and Angela steps into the world of Virginia Wolfe.

Chicken livers with hot honey; Ben preps for his art show; sampling sweet, honey-themed dishes.

Experiencing the hidden wonders of San Diego, where humans and wildlife coexist in the country's most biodiverse urban landscape.

A look at whether giant asteroid impacts were actually essential for the creation of life on Earth.

All-female news analysis of issues and policy affecting the U.S.

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

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

Diamond and star sapphire jewelry; a 1952 Al Stohlman tooled leatherwork picture; Kenner "Star Wars" action figures circa 1978.

A treasure hunt brings Moses back to London to sell a priceless diamond; Clarence is determined to prove he is as good as his predecessor.

When "Captain Farnon" is requested at the new and prestigious Beauvoir stables, everyone is confused by the arrival of both Tristan and Siegfried to tend to the horse, Philbrick.

There's excitement in the air when a film crew arrive at Archangel Lane, until an extra drops dead after eating poisoned chocolates meant for one of the cast.

South Carolina's Marcus King Band rocks fan favorites and new tracks from "Darling Blue"; Red Dirt country singer-songwriter Wyatt Flores shares songs from "Welcome to the Plains.".

A treasure hunt brings Moses back to London to sell a priceless diamond; Clarence is determined to prove he is as good as his predecessor.