Season enders arrive or loom for many of tonight’s shows. The remaining fake castaways scramble on “Survivor” (7 p.m., CBS) in advance of Sunday’s finale. “Survivor” may have lost its status as a water-cooler conversation starter, but it remains one of the most consistent series on a night of diminished ratings.

Renewed for another season, “Private Practice” (9 p.m., ABC) wraps up its season when Maya’s accident threatens her unborn baby’s life.

Also renewed, “Supernatural” (8 p.m., CW) offers a season-finale episode titled “Apocalypse,” where Good and Evil face off in an ultimate clash. Not sure where you can go from here, but anything is possible in the “Supernatural” realm.

A rare ray of light for the CW network, “Vampire Diaries” (7 p.m., CW) will return next season and wraps up its freshman year with deadly events at a Founder’s Day celebration.

Walter and Olivia travel to a parallel universe on “Fringe” (8 p.m., Fox). Leonard Nimoy guest stars on the first of a two-part season finale.

• “FlashForward” (7 p.m., ABC) doesn’t wrap up its first season until May 27, but on the show, the fateful date of futures foretold is only three days off. It doesn’t take a soothsayer to predict the fate of “FlashForward.” Fading ratings point to one-season status for this “Lost”-like head-scratcher.

• “PIIGs to the Slaughter” (9 p.m., Fox Business Channel) examines Europe’s debt crisis and offers speculation about similar scenarios unfolding in the United States. “PIIGs” is an acronym and economic shorthand for Portugal, Ireland, Italy, Greece and Spain, whose economies have caused recent fears.

• Celebrated for his acting prowess in such films as “Chaplin” and for playing an actor’s actor in “Tropic Thunder” and appearing in the hit sequel to “Iron Man,” Robert Downey Jr.’s film resume includes several overlooked efforts from the 1980s and 1990s worthy of rediscovery. Chief among them is the 1991 comedy “Soapdish” (7 p.m. and 9 p.m., TV Guide Network), a backstabbing backstage sendup of the TV genre featuring a game cast including Downey as well as Sally Field, Kevin Kline, Whoopi Goldberg, Cathy Moriarty and Teri Hatcher years and years before “Desperate Housewives.” Downey also appears tonight on “The Late Late Show” (11:37 a.m., CBS) with Craig Ferguson.

Tonight’s other highlights

• Josh Brolin stars as the 43rd president and son of the 41st president (James Cromwell) in director Oliver Stone’s 2008 biopic “W.” (6:50 p.m., Showtime).

• The Jefferson team goes all out to convict the Gravedigger on “Bones” (7 p.m., Fox). Ryan O’Neal guest stars.

• Jim and Pam suffer from sleep deprivation on “The Office” (8 p.m., NBC).

• Langston falls under suspicion in the Jekyll investigation on “CSI” (8 p.m., CBS).

• Liz takes a romantic inventory when she finds herself dateless for Floyd’s big day on “30 Rock” (8:30 p.m., NBC). Jon Hamm, Michael Sheen, Jason Sudeikis and Dean Winters guest star.

• “Undateable” (9 p.m., VH1) catalogs the offenses and oversights that keep men single. Repeat helpings air at 6 p.m., 7 p.m. and 8 p.m.

• The murder of a charity-organization bigshot sets up a clash between Jane and Kristina Frye on “The Mentalist” (9 p.m., CBS).

• Howie Mandel and Bette Midler appear on “The Marriage Ref” (9 p.m., NBC).