TV Highlights: 'Grey's Anatomy,' 'American Idol.' 'The Big Bang Theory'
Stefan and Elena just want to have a quiet, romantic weekend at a lake house on "The Vampire Diaries" (CW at 8) for a little alone time, but as in many horror movies, they are secretly followed, and things go disastrously.
Jessica Walter stops by "The Big Bang Theory" (CBS at 8) to play a wealthy university donor who causes Leonard to seriously question how far he's willing to go for his love of science; in other guest star news, Joshua Malina plays the university president.
The big-city auditions come to a close on "American Idol" (Fox at 8) as Steven Tyler, Jennifer Lopez and Randy Jackson join the top contestants in the first segment of Hollywood Week.
Although everyone's happy things are working out so well for Michael and Holly on "The Office" (NBC at 9), not everyone at Dunder Mifflin is quite so pleased when the couple's public displays of affection get a little out of control.
Meredith and Lexie get an interesting surprise when their father shows up at the hospital with a very young (and tattooed) girlfriend on "Grey's Anatomy" (ABC at 9), while Alex clashes with a new co-worker.
A thrift store makes an unpleasant discovery when it finds a dead body in a donated box on "CSI: Crime Scene Investigation" (CBS at 9); singer Christina Milian guests as the victim's ex-girlfriend.
Real-life spouses Nick Offerman and Megan Mullally team up again on "Parks and Recreation" (NBC at 9:30), as Mullally returns playing Ron's (Offerman) crazed ex-wife, who goes on a date with his co-worker just to make him jealous.
The crew at Charm City Cakes wraps up "Ace of Cakes" (Food Network at 10) on the series finale, and make a special time-machine cake celebrating the 25th anniversary of the Michael J. Fox-Christopher Lloyd classic "Back to the Future."
Awww. . . . Josh just wants to help his mom on "Million Dollar Listing" (Bravo at 10), so he takes a risky listing that could cause a loss in commission.
Sam and Charlotte have a tough decision to make when Charlotte's attacker arrives severely injured at the hospital on "Private Practice" (ABC at 10); meanwhile, Addison's mother begs Addison for help taking care of Susan, who's very ill.
Rob Lowe is a guest on "The Tonight Show With Jay Leno" (CBS at 11:35), along with actress Amber Riley and singer Nicki Minaj.
"Late Show With David Letterman" (CBS at 11:35) hosts "Jersey Shore's" Nicole "Snooki" Polizzi and a performance from Bryan Ferry.
- Emily Yahr