TONIGHT: Lots! We've got the season premieres of 90210 and Gossip Girl, the season finale of Dating in the Dark, plus new episodes of Thintervention with Jackie Warner, LIttle People, Big World, Bachelor Pad, Kate Plus 8, and much more!

8:00 PM

90210 A deadly earthquake strikes Beverly Hills in the Season 3 opener. Elsewhere, Naomi tries to cope with her rape; the Wilsons struggle with Harry's absence; Teddy faces a future without tennis after suffering an injury; and Annie and Liam make a decision about their relationship. (CW)
Bachelor Pad The Season 1 winners emerge from among three couples (six contenders in all), but not before a "Dancing With the Stars"-inspired competition and a reunion of all 19 contenders. (ABC)
Little People, BIg World Matt and Amy's busy public-speaking schedules start to take a toll on the kids, who aren't used to their parents being away for weeks at a time. (TLC)

8:30 PM

Little People, BIg World Matt and Zach embark on a father-son road trip in an attempt to mend their broken relationship. (TLC)

9:00 PM

Gossip Girl In the Season 4 opener, Blair and Serena enjoy summer in Paris, trying to forget about the guys back home, until Blair surprisingly sees Chuck in France. (CW)
Lie to Me Season 2 finale: The probe of the murder of Cal's friend, a journalist who was investigating political corruption, tests Cal's relationship with Reynolds and the FBI. Meanwhile, Cal is uncomfortable with Emily's newfound interest in dating. (FOX)
Kate Plus 8 Yay, exploitation of minors! (TLC)
The Closer The slayings of two paramedics could be a harsh signal, indicating that a potential terrorist attack is coming. (TNT)

10:00 PM

Dating in the Dark In the second-season finale, everyone snacks at an ice-cream-sundae bar. Included among the contestants: a set of twins. (ABC)
Thintervention with Jackie Warner Jackie divides her plus-size clients into support pairs. Later, it's an uphill battle when her charges embark on a punishing excursion up a mountainside while tethered to one another. In group therapy, one client reveals a painful past. (Bravo)
Weeds Nancy recruits a high-level hotel employee to help her move hash among the guests, as dishwasher Andy is cleaning up at his new job and bellboy Silas finds himself really hopping. (Showtime)

10:30 PM

The Big C An impulsive Cathy liquidates her retirement savings and buys a sporty red convertible, and also entertains thoughts about getting involved with Dr. Todd. (Showtime)

Who's on the Late Night Couches Tonight?

The Daily Show Ben Affleck (Comedy Central)
The Colbert Report Lisa Birnbach (Comedy Central)
Jimmy Kimmel Live!: David Hasselhoff, Chef Eric Ripert, Green Day (ABC)
Lopez Tonight: Snoop Dogg, Bethenny Frankel, Goo Goo Dolls (TBS)
Chelsea Lately Emma Stone, Chris Hardwick, Arden Myrin, Kevin Hart (E!)
The Tonight Show with Jay Leno: Bill Maher, Kristen Bell, Brandon Flowers (NBC)
Late Night with Jimmy Fallon: Christina Ricci, Robert Plant (NBC)
Late Show with David Letterman: Michael Douglas, Bill McKibben (CBS, Repeat)
Late Late Show with Craig Ferguson: Philip Seymour Hoffman, Ellie Kemper (CBS)