Oscar the Grouch and Zach Braff, Scrubs Oscar the Grouch and Zach Braff, Scrubs

9 pm/ET ABC
Scrubs fans have watched all sorts of characters learn important lessons about life and love over the years, and tonight is no different. Well, maybe a little different. J.D. wants to teach a lesson in compassion and receives help from an unlikely source: Muppets. That's right, Elmo, Grover and Oscar the Grouch make appearances at Sacred Heart to help J.D. spread the word. Meanwhile, a not-so-warm-and-fuzzy intern scams Elliot to land a spot on Turk's research team. —Brie Hearn

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10 pm/ET FX
While Christian and Liz sort things out in the wake of their intimate encounter and Christian gets another perspective on breast cancer, Sean is back on his feet and trying to sort things out with Julia. (So what else is new?) Eden returns as well, as warm and cuddly as ever. And remember brassy patient Candy Richards (Jennifer Coolidge)? Candy has reinvented herself, and she has a hip-hop video that's making a stir. —Paul Droesch

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Baldwin Hills
10 pm/ET BET
The third season of this reality show following the privileged teens of Baldwin Hills — an upscale neighborhood in L.A. chock-full of pro athletes, actors and lawyers — begins tonight with back-to-back new episodes. New to the show are high-school senior Etienne, heartthrob Trason and potential troublemaker Tyler. Returning cast members include Gerren, Moriah, Justin, Seiko and Staci. Tonight the newbies and vets mingle when Justin throws a party. Let the drama begin. —Brie Hearn

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Bad Girls Club
10 pm/ET Oxygen
Bad is so good. This season's contingent of coquettes has packed a punch — and brought on the ratings in the process. There have been bumpy romances, shadowy provocations, and out-and-out fisticuffs (in one corner Kayla, in the other Amber M.). When these pretty princesses go clubbing, they go clubbing — on one another and fellow patrons. It should get all the more interesting tonight when a new "bad girl" named Ashley arrives. The Ambers have blonde ambition: They set out to form an alliance with her in a pull for mansion dominance. Meanwhile, Ailea worries that a boozy slip-up will impact her romance with her older boyfriend, Kevin. —Dean Maurer

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8 pm/ET CBS
Fans get two cases in one when the investigation into the murder of a sergeant uncovers what may have been his secret life. To solve the murder case, the team must first crack the mystery of whether the man committed possible treasonous acts that may have led to his death. The O.C.'s Chris Carmack guest stars. —Bill Ecklund

For full episodes of NCIS, visit our Online Video Guide.