HIGHLIGHTS

HIGHLIGHTS

Elena decides the best way to help Bonnie stop having terrifying dreams about her ancestors is to hold a seance on "Vampire Diaries" (CW at 8); unfortunately, the results end up being even scarier.

Booth has trouble with accurate shooting after his brain surgery on "Bones" (Fox at 8), but must complete a recertification for FBI marksmanship.

The Parks Department people aren't exactly the most creative group, but they try to come up with a new design for a city hall mural after the existing painting is ruined on "Parks and Recreation" (NBC at 8:30).

After striking out finding a missing girl in Miami and New York, this week's trilogy comes to an end on "CSI" (CBS at 9) as Langston investigates a prostitution ring in Las Vegas.

Staff members of "The Office" (NBC at 9) begin to wonder if the already questionably sane Michael has finally lost his mind when he starts to act strangely after hearing troubling rumors about Dunder Mifflin.

Sam and Dean don't know whether to be flattered or creeped out when they're tricked into attending a "Supernatural" (CW at 9) convention and find fans dressed up as the two of them.

"Warren Buffett and Bill Gates: Keeping America Great" (CNBC at 9) has the two billionaires answering questions at Columbia University's business school about everything from the economy to the so-called American Dream.

Liz Lemon, the brains behind the "That's a deal-breaker, ladies!" catchphrase, gets offered her own talk show on "30 Rock" (NBC at 9:30) and debates whether to accept, while Jenna and Tracy start wondering if they should be less crazy when the new cast member turns out to be surprisingly low-maintenance.

After Owen recruits one of his fellow Iraq war veterans to become a new surgeon on "Grey's Anatomy" (ABC at 9), Cristina is suspicious about the man's actual abilities in the O.R.

"Project Runway" (Lifetime at 10) inches closer to choosing a winner on Part 1 of the season finale, as Tim Gunn visits Irina, Althea and Carol Hannah at home as they prep for the final design challenge.

Any thoughts of an easy hike go out the window for Addison and Sam on "Private Practice" (ABC at 10) when they stumble upon an expecting couple trapped in their car in Malibu.

New cast member Alexis shows up for a double date on "The Real Housewives of Orange County" (Bravo at 10) while Tamra and Gretchen get into a huge fight.

The bromance known as Dennis and Mac on "It's Always Sunny in Philadelphia" (FX at 10) hits a rough patch as the two decide to take a break from each other.

Actress Penélope Cruz stops by "The Jay Leno Show" (NBC at 10) and Dolly Parton answers 10 questions; NHL Hall of Famer Luc Robitaille also appears.

"The Tonight Show With Conan O'Brien" (NBC at 11:35) hosts Al Gore, actor Jim Parsons and singer Jason Mraz.

Kid scientists and actress Amanda Peet are guests on "Late Show With David Letterman" (CBS at 11:35) and the Cribs perform.

-- Emily Yahr