Highlights 9/9 to 9/15

Broadway or Bust at 7 pm Sunday tracks the real-life stories of America’s top high school musical performers, vying in the ultimate competition to find the nation’s best young rising stars.

With Wallander’s work now getting too close to home, he follows the leads of two investigations that become increasingly entangled on Masterpiece Mystery! at 8 pm Sunday.

The stakes could not be higher as visionary director Robert Lepage, some of the world’s greatest operatic artists, and the Metropolitan Opera tackle Wagner’s Ring Cycle on Great Performances at the Met on Monday at 8 pm. This documentary is followed by the complete Ring Cycle performance on Tuesday, Wednesday, Thursday and Friday at 8 pm.

Nova “Engineering Ground Zero” at 7 pm Tuesday captures the behind-the-scenes struggle of architects and engineers with the pressures of a tight schedule, the demands of practical office space and efficient, “green” architecture and the public’s expectations of a fitting site for national remembrance.

In honor of the 50th anniversary of the publication of “Born Free” — a book and then a film that forever changed the way we think about wildlife, Nature at 7 pm Wednesday returns to tell the story of the lions profiled. What has happened to lions since this story? And what has happened to the people featured in the film?

Trouble Puppet Theater takes Arts In Context at 7:30 pm Thursday on a journey into the art of puppetry as the company produces one of their unique plays led by creative director and master puppeteer Connor Hopkins.

See how to grow olive trees for silvery leaves and maybe a few olives on Central Texas Gardener at noon Saturday. On tour, visit a lawn-reduction makeover with drought tough plants.

Modern rock band Wilco returns to Austin City Limits at 7 pm Saturday with tunes from its LP The Whole Love.