Highlights 6/20 to 6/26

Nature at  7 p.m. Sunday follows a group of individuals working to provide proper care and freedom for captive chimpanzees.

Miss Marple accompanies Lady Virginia Revel to a weekend party at her family home of Chimneys and uncovers a decades-old murder on Masterpiece Mystery! at 8 p.m. Sunday.

History Detectives at 8 p.m. Monday season premiere launches into space for an exhilarating hour exploring the excitement, promise and ingenuity that fueled America’s foray into space exploration.

Korean War veterans recount their memories of America in the late 1940s and early 1950s on Unforgettable: The Korean War at 9 p.m. Monday.

Nova at 7 p.m. Tuesday gets up close and personal with Cuttlefish, one of the strangest animals on our planet.

Frontline at 8 p.m. Tuesday goes behind the scenes at Dignitas, the Swiss non-profit that has helped over one thousand people die since 1998, to explore the question of do we have the right to end our lives if life itself becomes unbearable.

POV’s new season begins with William Kunster: Disturbing the Universe at 9 p.m. Tuesday. William Kunstler’s two daughters seek to recover the real story of what made their late father one of the most beloved, and hated, lawyers in America.

Craig Ferguson hosts this star-studded 125th anniversary celebration of the Boston Pops, telling the story of the orchestra’s transformation from summertime entertainment for Bostonians to the national icon it is today at 7 p.m. Wednesday and 8 p.m. Thursday.

Every three years the world’s best young harpists face-off in the USA International Harp Competition. Harp Dreams at 8 p.m. Wednesday follows several contestants from Russia, France, Switzerland Japan and the United States, as they hone their skills to compete for the grand prize.

British songwriting legend Nick Lowe surveys his 30-plus year catalog with classics and new tunes on Austin City Limits at 10 p.m. Wednesday and 9 p.m. Friday. Also, Oscar-winning Glen Hansard & Marketa Irglova, aka the Swell Season, perform cuts from the soundtrack of their movie Once.

Montrose, Texas tells the story of one of the most colorful and legendary neighborhoods in Texas at 9:30 p.m. Wednesday.

Texas-born actor Thomas Haden Church discusses his career on Texas Monthly Talks at 7 p.m. Thursday and 8:30 p.m. Friday.

Musician Billy McLaughlin astounded audiences with his innovative guitar technique and composing style. This documentary at 9 p.m. Thursday chronicles his unlikely attempt to re-claim his career by re-training himself to become a left-handed guitarist after loosing use of his right hand to an incurable neuro-muscular disorder.

Sarah McLachlan graces the Austin City Limits stage at 7 p.m. Saturday in support of her greatest hits set, Closer: The Best of Sarah McLachlan. Also, British rising star Duffy follows with grooving pop soul.