Glenn Close narrates “In Search of the Jaguar” (7 p.m., PBS), which follows conservationist and author Dr. Alan Rabinowitz as he attempts to secure safe havens for the endangered jungle cat.

The number of jaguars has dwindled because their habitat has been deforested and developed. Rabinowitz hopes to establish a “jaguar corridor,” a continuous stretch of public and private lands stretching from Mexico to Argentina, that will allow the ferocious felines to migrate and breed with other populations.

He faces huge obstacles, including political indifference, drug runners and guerrilla warfare. But his greatest challenge is his own health. Rabinowitz was diagnosed with leukemia in 2001, but he continues his efforts to save the big cats that have been his life’s obsession.

• Last winter’s “Bachelorette” Trista Rehn (rhymes with whine) and her poetry-spouting fiance Ryan Sutter return for “Trista and Ryan’s Wedding” (8 p.m., ABC), a three-episode celebration of high-maintenance behavior and consumer indulgence culminating in their fantastically expensive December nuptials.

Tonight’s other highlights

• Accusations of deceit rankle members of the Balboa tribe on “Survivor: Pearl Islands” (7 p.m., CBS), culminating in eviction No. 10.
• A lawyer with a toupee wants to come “clean” on “Queer Eye for the Straight Guy” (7 p.m., NBC).
• A generous gesture makes for awkward feelings on “King of Queens” (8 p.m., CBS).
• On back-to-back episodes of “Law & Order” (NBC), evidence of a serial killer (8 p.m.), a counselor who claims to talk to the dead dies (9 p.m.).
• Seth explains his holiday behavior on “The O.C.” (8 p.m., Fox).

Late night

Mike Myers is on “Late Show with David Letterman” (10:35 p.m., CBS) … Jay Leno welcomes Annika Sorenstam on “The Tonight Show” (10:35 p.m., NBC).

Ron Howard and The Strokes visit “Late Night with Conan O’Brien” (11:35 p.m., NBC) … Jason Kidd joins “The Late, Late Show with Craig Kilborn” (11:37 p.m., CBS).