America in the 1960s and 70s was in turmoil. The civil rights struggle, the war in Vietnam and the sexual revolution defined a nation in conflict. But at 10 o’clock every Saturday night, in dorms and dens, in living rooms and bedrooms across the country, Americans watched “The Carol Burnett Show.” For 11 years, the wacky performer yelled like Tarzan and won — and sometimes broke — our hearts with her edgy, always sympathetic, characters. She could fall down a flight of stairs or hold her own in a duet with Julie Andrews. Yet, as with so many brilliant comedians, hers was a difficult childhood. A glimpse of something deeper and darker began to emerge in the dramatic career that followed her TV variety show.

Explore the human-rights implications of the country’s least winnable war – the war on drugs. Consider the statistics: More than 40 years since it began, it is the longest conflict in American history. It has resulted in more than 45 million arrests and made the United States the world’s largest jailer. It has fueled armed conflict overseas, devastated poor communities and disproportionately targeted people of color. And yet, drugs are cheaper, stronger and more plentiful than ever.

During a visit to the Cincinnati Zoo, ANTIQUES ROADSHOW discusses with the U.S. Fish & Wildlife Service how today’s endangered rhinos are affected by the antiques trade. Discoveries in “the city that sings” include a suit that belonged to chicken magnate Colonel Sanders; a bronze horse sculpture by Solon Borglum; and an 1846 wall map of the western United States, valued at $11,000-$12,000.

RICK STEVES' EUROPE TRAVEL SKILLS distills Rick Steves' 30 years of travel experience into an information-rich two-hour special. Rick dispenses practical advice on enjoying a fun, affordable and culturally broadening trip to Europe. Shot on his favorite 3,000-mile "Best of Europe" loop — Amsterdam, Germany's Rhineland, Venice, Siena, the Italian Riviera, the Swiss Alps, Paris and London — Rick shares the essential skills of smart travel. He covers planning an itinerary, hurdling the language barrier, driving rental cars and catching trains, avoiding scams, eating well, sleeping smart, staying safe and revealing everything viewers need to know to turn their travel dreams into reality.

In this special, viewers share in the four-decade career of Peter Yarrow, Noel Paul Stookey and Mary Travers. CARRY IT ON features rare archival performances of songs that energized the spirit of the nation’s cultural and political renaissance, including “Blowin’ in the Wind,” “The Times They Are A-Changin’,” “Lemon Tree,” “Puff, the Magic Dragon,” “Wedding Song,” “Light One Candle,” “Leaving on a Jet Plane,” and anthems like “If I Had a Hammer.” Woven together with the varied musical performances are poignant comments from Peter, Paul and Mary, Pete Seeger, Richie Havens, Ronnie Gilbert of the Weavers and legendary record producer Phil Ramone, among others.

This new Victor Borge television special features his recently rediscovered funniest and most memorable skits — a truly unparalleled collection not to be missed. Included is rare archival footage from “The Andy Williams Show” and “The Perry Como Show” (not seen in more than 40 years), a hilarious classic performance from the Ford Theater of Phonetic Punctuation with President and Mrs. Reagan in the audience, and touching, heartfelt reminiscences from his five children of their favorite Borge routines.

Beloved Irish crooner Daniel O’Donnell and his melodic voice return to PBS in this new concert special filmed in Iowa, the Hawkeye State. Exuding the same passion and unique sense of humor that have fascinated audiences for years, O’Donnell sings, dances and charms his way into viewers’ hearts with a mix of country, pop hits and fan favorites.

In the face of horrific living conditions, starvation and the threat of deportation to Auschwitz, the Jewish inmates of Terezin concentration camp — artists, musicians, poets and writers — fought back … with art and music. Led by conductor Raphael Schachter, they re-imagined a Catholic liturgical work, Verdi’s Requiem, as a condemnation of the Nazis. Ultimately, they performed for Nazi brass, singing what they dared not say. Six decades later, conductor Murry Sidlin and a new choir take Verdi’s Requiem back to Terezin and bring the story of Raphael Schachter’s artistic uprising back to life. Bebe Neuwirth narrates.

Harry skirts scandal by putting cosmetics at the front of the store. Meanwhile, his private life gets complicated as Ellen Love, Lady Mae and his wife, Rose, make waves.

The Nonnatus community is rocked when the Kelly family’s newborn son dies in unexplained circumstances. Cynthia, who had attended the birth, comes under intense scrutiny from the police and the pregnant women of Poplar. Despite reassurances from her friends and colleagues, Cynthia questions her own abilities and the strain takes its toll on her work and health. Now fully ensconced in married life with PC Noakes, Chummy decides to pursue her dream, bringing about a different sort of pressure. Meanwhile, a chance encounter returns Jimmy to Jenny’s life.