FINALE WATCH: “Splash” (ABC at 8) Status: Unknown. The reality series competition, which challenged celebs to perform difficult high dives, got off to a shaky start with dropouts and injuries — no word on whether the series will return. In the Season 1 finale, the final three competitors will perform a dive of their choice, and a live studio audience will choose the winner.

FINALE WATCH: “Hart of Dixie” (CW at 8) Status: Renewed for Season 3. This city-girl-moves-to-the-small-southern-town drama squeaked by with a renewal last year, and on the heels of a solid second year, the network announced Zoe (Rachel Bilson) and crew will be back again. Zoe flees Alabama for some time in New York City, while Lemon scrambles to enlist country trio Gloriana to perform for a local music festival.

Colin Hanks guest stars as a Department of Defense investigator who grills the team about the response to a case involving the murder of Ziva’s father on “NCIS” (CBS at 8).

Where’s the best pizza in D.C.? It’s a frequent question, and new special “Pizza in Washington” (WETA at 8) tracks down the answer, as the documentary — reviewed by Hank Stuever on Page C2 — visits a dozen restaurants around the area.

SERIES PREMIERE: NPR’s Peter Sagal travels across the nation on docu-series “Constitution USA” (WETA and MPT at 9), reviewed by Stuever on Page C1 .

The day before Cece’s wedding, Jess lands an amazing opportunity for a new job on “New Girl” (Fox at 9); and while she’s mulling her future, her dad pays a visit to the loft, where Nick is the only one home.

Kensi runs surveillance on Deeks and his female source on “NCIS: Los Angeles” (CBS at 9), but she isn’t prepared for what she sees.

Things seem to be going well with Mindy and her new boyfriend, Casey, on “The Mindy Project” (Fox at 9:30) — until he tells her he’s moving to Haiti.

The team goes into disaster mode after a plane crashes in Philadelphia and hits the city’s main power grid on “Body of Proof” (ABC at 10), as lack of electricity means Megan must conduct autopsies between sudden blackouts.

Clark makes a startling discovery when a call girl is found dead on “Golden Boy” (CBS at 10), as it turns out his nemesis — Deputy Mayor Holbrook — was her final client before she died.

Actor Mark Harmon is on “Late Show With David Letterman” (CBS at 11:35), along with country singer Luke Bryan.

“The Tonight Show With Jay Leno” (NBC at 11:35) hosts E! correspondent Ross Matthews, and an interview with country singer Miranda Lambert — and later, a performance by her band, Pistol Annies.

Emily Yahr