The island of Madagascar is home to an abundance of unique wildlife species – including 101 endangered types of the small primates known as lemur. They live only on Madagascar, and one by one, they are dying there. In the special MARTIN CLUNES: THE LEMURS OF MADAGASCAR, British actor Clunes (Doc Martin) travels to the island to explore and expose the urgent plight of this rare – and endearing – species. In this beautiful and deeply moving film, Clunes travels down to the Indian Ocean to witness what many fear is the lemur's last stand.

PBS NEWSHOUR covers the national news as it unfolds, inside the beltway and on the campaign trail. Gwen Ifill and Judy Woodruff will co-anchor live gavel-to-gavel coverage of the political conventions and all election specials.

This is the invigorating first-person documentary account of Lee Gorewitz’s life inside the Traditions Alzheimer’s & Other Dementia Care Unit at the Reutlinger Community for Jewish Living in Danville, California. A total immersion into the fragmented day-to-day experience of the disease, the film reveals Lee’s penetrating ruminations and charismatic vitality, challenging preconceptions of illness and aging.

This week on MARKET WARRIORS, pickers Miller, John, Bob and Kevin return to Canton, Texas, home to First Monday Trade Days, a massive monthly market in East Texas. Day two is a challenge for the pickers, working within their fixed budgets to find something from the 19th century. Off-screen host Mark L. Walberg comments on the broad range of finds the pickers bring to the table, including a blue railroad lantern and a pair of carved Chinese figures. Other finds include a Japanese hibachi, a German wall clock and a folk art cabinet. This week one picker’s creativity and knowledge provides a winning edge when the items go to auction at Ken Farmer’s Auctions in Radford, Virginia.

“Junk in the Trunk 2” features never-before-seen appraisals from ROADSHOW’s Season 16 tour. Travel with ROADSHOW through El Paso, Atlanta, Minneapolis and more to enjoy new appraisals such as a Missouri Regiment Colt Pistol worth more than $22,000, sapphire and diamonds from Tiffany, and Dr. Seuss’ signature.

As 165 Eaton Place prepares for the annual servants’ ball, Mr. Pritchard enjoys a romance with fellow servant Miss Whisset and starts to wonder if there’s more to life than service. With war looming, Harry has a proposition for Beryl; however, a shocking revelation threatens to thwart their plans. Meanwhile, as Lady Persie and Sir Hallam continue their affair, Sir Hallam is about to discover just how destructive his actions have been.

Sister Monica Joan is found wandering near the docks and returned to Nonnatus House by the police. Her adventure takes its toll on her health and she develops pneumonia. When she eventually recovers she returns to the community, only to find herself in trouble with the law when she is accused of theft. As Sister Monica Joan's case progresses to trial, the Nonnatus House community fears that the elderly nun could go to jail. Chummy is worried when her mother decides to make a trip to “inspect” her new beau.

With the death of owner Karl Wainwright, the Easterly Grange Hotel falls into the hands of four beneficiaries. When Gregory Chamber — one of the new hotel owners — does not attend Karl’s funeral, a frantic and worried search party forms. The party scours the woods for a trace of George, ultimately making a grave discovery when they find his severed hand. DCI Barnaby quickly launches a murder investigation, and solving the case takes on a renewed sense of urgency when fatal accidents soon befall the other beneficiaries. A string of affairs and death threats reveal an undisclosed will, a deadly motive and ultimately the "Destroying Angel."

The Dave Eggar Quartet has performed throughout the United States and Asia, specializing in both traditional and innovative repertoire. Recent engagements have included performances at Lincoln Center, the Thailand International Composition Festival, Manila Jazz Festival, LACMA, St. Louis Center for Contemporary Arts and Houston Da Camera. Their recent release, The Yoga Sessions: Mozart on Yoga Organix and White Swan records, is an innovative fusion of Mozart and World Music created with yoga icon Derek Beres. In the pop world, the sound of Dave Eggar Quartet can be heard on records by Frank Ocean, Patti Smith, Train, Talib Kweli, Richard Bona, Taylor Swift, Beyonce and Sandra Bernhard.

After discovering that the Constitution does not guarantee the right to vote, political humorist Mo Rocca sets out on an irreverent road trip to see how voting works in America. Rocca — a correspondent for “CBS Sunday Morning” and a panelist on NPR’s “Wait, Wait ... Don’t Tell Me!” — heads to Indiana, home to some of the strictest election laws in the country, and meets one Republican and one Democrat who take him inside their efforts to get out every vote. As he progresses on his journey, he searches for the Electoral College; critiques ballot design with Todd Oldham; investigates the debate over voter ID and voter fraud; and explores the case of a former felon who was sentenced to 10 years in prison — for the crime of voting. Eye-opening, engaging and nonpartisan, ELECTORAL DYSFUNCTION is for voters who want their votes to count.