Highlights July 4 to 10

The 30th anniversary broadcast of A Capitol Fourth at 7 p.m. and 8:30 p.m. Sunday features performances by Reba McEntire, Gladys Knight, David Archuleta, John Schneider and Lang Lang with the National Symphony Orchestra.

History Detectives at 8 p.m. Monday takes on the mystery of what could be a clip of the first talking motion picture.

In a remote corner of the Himalayas, in the forbidden kingdom of Mustang, a team of climbers scale cliffs to climb into mysterious caves for the first time and discover ancient cave temples lost to the modern world on Lost Cave Temples at 9 p.m. Monday.

Nova at 7 p.m. Tuesday puts viewers in the cockpit to experience the lethal split-second duels in the skies over MiG Alley, a strip of airspace between the Korean-Chinese border.

Ideal World at 8 p.m. Tuesday follows the fascinating development of the Web site Second Life, from its humble origins to the global phenomenon it has become.

POV “Promised Land” at 9 p.m. Tuesday follows two black communities in South Africa as they struggle to reclaim land from white owners.

David Suchet on the Orient Express at 7 p.m. Wednesday and 8 p.m. Thursday leads viewers on an epic journey on an iconic train through a series of romantic cities and stunning scenery.

Ken Burns’ documentary Baseball at 8 p.m. Wednesday kicks off the sixth inning with the baseball season of 1941.

Gnarls Barkley brings its eccentric hip-hop and R&B sounds to Austin City Limits at 10:30 p.m. Wednesday and 9 p.m. Friday. Thievery Corporation follows with psychedelic worldbeat electronica from its new album, Radio Retaliation.

Helen Thomas, who has covered the daily administration of every President since JFK, talks with Evan Smith about her six decades as a journalist on Texas Monthly Talks at 7 p.m. Thursday and 8:30 p.m. Friday.

M. Ward highlights his latest LP Hold Time on Austin City Limits at 7 p.m. Saturday. Austin indie rock favorite Okkervil River follows.