WGBH

Bill Moyers and Campbell discuss cultural heroes and heroic journeys that all people make.

Tracing the band's whirlwind rise in 1963-1964; the creation of "A Hard Day's Night" feature film; the recording of songs like "I Should Have Known Better," "Can't Buy Me Love" and "Tell Me Why.".

In Canada, a baby turtle ventures through a forest in search of the lake where she will spend the next 50 years; a young bush baby in South Africa searches for a new home.

The colorful world of Earth's essential pollinators -- bees, moths and butterflies.

How zookeepers raise a baby elephant; King Friday wants to know what's inside Mayor Maggie's backpack.

The gang hopes that dealing with the Tibble twins will be easier when one gets sick; Arthur and his friends make music videos.

When Chris and Martin lose their gear to a snapping turtle, they get stuck mini-sized in a vast northern woodland lake.

Lily and her family discover a surprise and also embark on a weather hunting expedition.

Lyla and Everett play basketball against their moms; Lyla and Luke restore their old toy car to make it special for Stu.

Carl's medium-sized fuchsia yo-yo goes missing from his collection; a rainy day changes Carl's pool day plans.

Daniel is unsure about his new babysitter; Daniel and O the Owl sleep over at Katerina's.

Phoebe plans a birthday surprise for Grandma; Phoebe and Jay must tend to the bell pepper in the garden.

Grover tries to cheer up Elmo, who is feeling sad after his dad leaves for a work trip.

Journeys that make an impact.

Members of the Cree Nation reintroduce the American buffalo; a new breed of cattle ranchers on Montana's high plains; conservationists in the Centennial Valley work to restore the Arctic grayling.

Breakfast at Pickering House Inn in New Hampshire; cross-country skiing; winter surfing in Maine; floral designer Hafsa Lewis' work includes the huge wreath adorning Brant Point Light at Christmas.

Regional traditions surrounding walleye and perch in Ohio; catching walleye in Lake Erie; cooking walleye fillets, cheeks and "wings" on Kelleys Island; raising perch with aquaculture; sampling gefilte fish in Cleveland.

Cassandra visits Philadelphia and New York to connect with family and friends; Marvina Robinson, founder of B Stuyvesant Champagne; sommelier and restaurateur Andre Mack.

In Canada, a baby turtle ventures through a forest in search of the lake where she will spend the next 50 years; a young bush baby in South Africa searches for a new home.

NASA's New Horizons probe captures the first-ever detailed images of the icy world of Pluto.

When the Soviet Union falls, Russia welcomes U.S. astronauts to their space station, Mir, but cooperation between former Cold War enemies is threatened by a run of disasters onboard.

Exploring the Caribbean heritage of actors Liza Colón-Zayas and Delroy Lindo.

Mary struggles with the knowledge that Abe is a spy for the rebels; Ben and Caleb lead a raid on Setauket.

Detective Phryne Fisher embarks on a globe-trotting adventure to uncover priceless treasures, wartime secrets and an ancient tomb that holds a terrible curse.

When a monk is found dead in a chapel kneeling in prayer, Patience and Frankie dig into the monastery's secrets.

As Alphy seeks redemption, Geordie's investigation into a local crook ignites a high-stakes siege; courage, love and sacrifice are pushed to their limits.

Tensions arise as Downton Abbey hosts a lavish Christmas party.

Campbell examines creation stories and explains how myths reveal spiritual potential.