July 25: Sunday at 2 p.m., tenor Placido Domingo sings the title role in “Simon Boccanegra” on “Great Performances at the Met.” James Levine conducts Verdi’s tragic story of a father and his lost daughter.

At 4:30 p.m., Vermont Public Television encores “Pavarotti: Salute Petra,” a tribute concert to the late tenor. The lineup of singers includes Jose Carreras, Placido Domingo and Angela Gheorghiu. Eugene Kohn conducts.

At 9 p.m., “Masterpiece Mystery!” presents another new Hercule Poirot story. An archaeological dig in the Middle East is the scene of a murder, leading Agatha Christie’s Belgian detective (David Suchet) to unravel a twisted tale of family secrets.

July 26: Monday at 7:30 p.m. on Vermont Public Television’s “Profile,” Fran Stoddard talks with Maj. Gen. Michael Dubie, head of the Vermont National Guard. The program will also air Saturday at 4:30 p.m. and is available as video on demand at www.vpt.org.

At 8 p.m., as part of its summer repeat season, “Antiques Roadshow” is in Las Vegas for three shows. Today, experts appraise drawings by folk legend Woody Guthrie and a fivecarat diamond ring.

July 27: Tuesday at 8 p.m., “Nova” continues its month of flight-related stories. “Who Killed the Red Baron?” looks at the controversy among historians about what happened to German ace Manfred von Richthofen during World War I. ”Nova” also airs Thursday at 8 p.m. on the VPT World Channel.

At 9 p.m., the series “Lost Treasures of the Ancient World” continues to use detailed reconstructions and animation to recreate ancient sites as they might have looked in their prime. Today, the focus is on Pompeii before the eruption of Mt. Vesuvius in 79 A.D. buried it.

At 10 p.m., “Frontline: The Dancing Boys of Afghanistan” looks at an ancient tradition, banned while the Taliban ruled, that has re-emerged. Young boys are traded for sexual favors.

July 28: Wednesday at 8 p.m., “Paul McCartney in Performance at the White House” presents the festivities held last month when McCartney won the Gershwin Prize for Popular Song. He and musicians Stevie Wonder, Elvis Costello, the Jonas Brothers, Herbie Hancock, Corinne Bailey Rae, Emmylou Harris, Lang Lang and others performed for the President and First Lady.

At 9:30 p.m., VPT rebroadcasts an “In Performance at the White House” special from last year featuring musicians from the U.S. civil rights movement of the 1950s and ‘60s.

At 10:30 p.m., “Sun Studio Sessions” captures an intimate performance by Vermont’s own Grace Potter and the Nocturnals.

July 29: Thursday at 8 p.m., Vermont Public Television encores its documentary “The Long Trail: A Footpath in the Wilderness” in honor of the 100th anniversary of The Long Trail. The film follows an endto end hike, celebrating the beauty, history and hikers of the trail along the way.

At 9 p.m., “Apollo Wives” takes a look at what it meant to be the wife of an astronaut: what was required of them by their husbands, NASA and the media. Ten wives were interviewed at