“Big Ideas for a Small Planet” (8 p.m., Sundance) enters its third season with a glance at ways the music industry is adapting to environmental concerns. It’s an episode I like to call, “How Green Was My Marketing?”

We meet Emmett Malloy of Brushfire Records who has renovated and retrofitted an old house with solar panels and other gadgets. He uses the energy to run his sound studio and other aspects of the recording business without having to draw much power from the grid.

The folks at Brushfire are also concerned about the paper that goes into their CD packaging and even the plastic jewel boxes that hold the disks. They have adjusted their packaging to be eco-friendly, which benefits the planet and also helps their recordings stand out in a competitive marketplace where many consumers have given up buying CDs entirely.

From time to time, folk-rock recording star Jackson Browne chimes in with ways that current environmental awareness echoes earlier eras of activism. And a guy in a gold top hat extols the virtues of putting on loud concerts with amplifiers and stages that run on sustainable energy. Some may find this inspiring while others, a cringe-worthy scene straight out of “The Goode Family,” Mike Judge’s animated comedy about suffocating political correctness.

Instead of watching proud (and perhaps a little smug) music types brag about their sustainable lifestyle, I would like to have seen a little more how-to, DIY and dollars and sense in this “Big Ideas” presentation. How much did it cost to cover the roof of Brushfire Records’ headquarters with solar panels? And how long will it take for that investment to pay for itself? Is it a plan that makes sense for the average home or business? And if not, why not?

Not all of us are rich record executives, and not all of us can hide our “green” investments in our marketing budgets. Until “green” makes sense on a level that has nothing to do with showing off or feeling guilty, people are going to be a tad cynical about Sundance’s “Big Ideas for a Small Planet.”

• A plastic surgeon and his team try to drum up new business by opening a spa on the documentary series “Addicted to Beauty” (10 p.m., Oxygen).

• A repeat of “America’s Got Talent” (7 p.m., NBC) gives way to two new hours at 8 p.m. and 9 p.m. This family-friendly talent show continues to dominate the summer ratings. But it’s not as much fun to watch the judges cut previous winners as it was to send legions of worthies to Las Vegas. Did anyone really expect Tony Ferrante, the 74-year-old disco dancer, to go all the way?

Tonight’s other highlights

• Amateur hour ends on “The Superstars” (7 p.m., ABC), postponed from last week.

• Survivors of shark attacks live to describe their ordeal on “Top Five Eaten Alive” (7 p.m., Discovery).

• A pool party stays on the shallow side on “More to Love” (8 p.m., Fox).

• Scheduled on “Nova ScienceNow” (8 p.m., PBS, check local listings): dark matter; mice, memory and Alzheimer’s; detecting Photoshop fakes.

• The theft of a Native American artifact leads the team to a mystic enclave on “Warehouse 13” (8 p.m., SyFy).

• Allison’s dreams portend the end of the world on “Medium” (9 p.m., CBS).

• “Primetime: Family Secrets” (9 p.m., ABC).

• “P.O.V.” (9 p.m., PBS, check local listings) presents the 1969 documentary “Johnny Cash: The Man, His World, His Music.”