TONIGHT: Lots of TV! We have the season premiere of Vampire Diaries, the series premiere of Nikita, the season finale of Rookie Blue, plus new episodes of Jersey Shore, The Real Housewives of DC, Big Brother, and much more!

8:00 PM

Big Brother 12 The final HoH competition is held. (CBS)
Vampire Diaries The second season begins with Elena discovering her uncle John's bloody body and learning Jeremy's fate, and Damon realizing that Katherine has returned. (CW)
Extreme Cuisine with Jeff Corwin The Louisiana bayou is explored. Featured dishes include wild rice; goose gumbo; gar balls; blackened catfish; crawfish; and wild boar. (Food Network)

9:00 PM

Nikita A spy returns to exact revenge on the clandestine agency that betrayed her after training her to be an assassin. (CW)
The Real Housewives of DC Happiness is squashed at a vineyard grape stomp when Michaele and Tareq make disturbing accusations about Mary's daughter. (Bravo)
Rookie Blue In the first-season finale, the rookies face evaluations to determine whether they'll keep their badges or not, and Andy thinks about quitting the force. (ABC)

10:00 PM

Jersey Shore The roommates deal with the fallout from the girls' fight; Angelina starts dating a guy she met at the club; J-Woww and Snooki don homemade hazmat suits to clean up the "smush" room. (MTV)
Watch What Happens: Live It's time for the third season premiere of Andy Cohen's experiment in narcissism! (Bravo)

Who's on the Late Night Couches Tonight?

The Daily Show: Meghan McCain (Comedy Central)
The Colbert Report: Sen. Jim Webb, Joshua Bleill, Lt. Col. Brent Cummings, John Legend (Comedy Central)
Jimmy Kimmel Live!: Diane Sawyer, Donal Logue, Ray LaMontagne (ABC, Repeat)
Lopez Tonight: Kathy Griffin, the Cast of Jersey Shore (TBS, Repeat)
Chelsea Lately: Sarah Colonna, T.J. Miller, Dov Davidoff (E!)
The Tonight Show with Jay Leno: Katie Couric, Kurt Warner, David Gray (NBC)
Late Night with Jimmy Fallon: Ali Larter, Mario Batali, Jerry Lee Lewis (NBC)
Late Show with David Letterman: Jack Hanna, Jamey Johnson (CBS)
Late Late Show with Craig Ferguson: Rashida Jones, Dr. Mehmet Oz, Blake Shelton (CBS)