Community: Abed (Danny Pudi) goes toe-to-toe with the leader (guest star Hilary Duff) of the school's “mean girls” in this repeat (8 p.m. NBC).
So You Think You Can Dance: Jessie J. performs on this elimination episode (8 p.m. Fox).
Love Bites: “Scrubs'” Donald Faison guest stars in this episode of the anthology series (10 p.m. NBC).
The Real Housewives of New York City: The women prepare to depart from Morocco in this new episode (10 p.m. Bravo).
UFO's Best Evidence Caught on Tape: This new special offers video footage of purported extraterrestrial visitations (7, 8 and 11 p.m. Biography).
Green Lantern: An Exclusive Look: This special offers a sneak peek at the new sci-fi film based on the comic book and starring Ryan Reynolds (8 p.m. G4).
A Journey for Good — Tanzania: Six visitors do volunteer work in the African nation in this special (9 p.m. KCET).
Attack of the 50-Foot Woman: A mini-marathon of super-schlocky sci-fi B-movies kicks off with this super-sized 1958 camp classic (5 p.m. TCM).
The Truth Below: Four friends (Gillian Zinser, Reid Ewing, Nick Thurston, Ricky Mabe ) on a snowboarding trip get trapped by an avalanche in this made-for-cable thriller (10 p.m. MTV).
Baseball: The Orioles play the Blue Jays or the Rangers face the Yankees 9:30 a.m. MLB); the Brewers battle the Cubs (11 a.m. WGN America); the Red Sox take on the Rays or the Met meet the Braves (4 p.m. MLB).
Golf: The 2011 U.S. Open Championship gets underway in Bethesda, Md. (7 a.m. and 2 p.m. ESPN; noon NBC).
Photo: National Geographic