Salvador & Lupe Villaseñor’s wedding party, a still from “Latino Americans.” (Victor Villaseñor/PBS)

On the third and final installment of “Latino Americans” (WETA and MPT at 8 p.m.), the documentary looks at how Latinos got involved with the political process in America, and the process of organizing farm workers in California.

It’s the conclusion of highlights from the 2013 iHeartRadio Music Festival (CW at 8), with segments of performances from Justin Timberlake, Bruno Mars, Maroon 5, Tim McGraw, Drake and Paul McCartney.

Ziva is still missing on “NCIS” (CBS at 8) — and soon she’ll be gone for good when Cote de Pablo departs the show year — but Tony travels to Israel to find her.

Jake has an unfortunate cold streak and can’t seem to solve a case on “Brooklyn Nine-Nine” (Fox at 8:30); later, Amy has trouble connecting with at-risk teens when she’s assigned to run a leadership program.

A double-date situation with Jess and Nick and Cece and Schmidt seemed inevitable on “New Girl” (Fox at 9), while fifth wheel Winston proves he still has a purpose when he tries to get the gang reservations at a fancy restaurant.

Kate continues to throw herself into her stepmom role by helping coach Bert’s soccer team on “Trophy Wife” (ABC at 9:30), which seems like it will go really well.

Mindy’s pastor boyfriend returns from Haiti suddenly deciding he wants to become a DJ, so the ever-supportive Mindy and her colleagues go see him perform at a music festival on “The Mindy Project” (Fox at 9:30).

The craziness revs up for the lottery winners on “Lucky 7” (ABC at 10), as the news media descends on the now-rich gas station employees; later, the women go shopping with their newfound fortune.

SAMCRO’s compound is attacked on “Sons of Anarchy” (FX at 10), and the gang doesn’t waste any time going after the perpetrators for revenge.

Actress Sarah Michelle Gellar, actor Nick Offerman and musical guests First Aid Kit are on “Late Show With David Letterman” (CBS at 11:35).

“The Tonight Show With Jay Leno” (NBC at 11:35) hosts actors Joseph Gordon-Levitt and Jay Mohr, along with a performance by Mika featuring Ariana Grande.

Actors Will Arnett and Clark Gregg are on “Jimmy Kimmel Live” (ABC at 11:35); plus, singer Bonnie Raitt performs.

— Emily Yahr