Wednesday's TV highlights


American Idol: The first batch of semifinalists is revealed on a new episode of the singing competition (8 p.m. Fox).

Are You There, Chelsea? "Extra's" Mario Lopez guest stars as himself on a new episode of the sitcom (8:30 p.m. NBC).

Rock Center With Brian Williams: Efforts to save endangered rhinos are examined on a new edition of the newsmagazine

(9 p.m. NBC).

20/20: Robin Roberts profiles assorted 2012 Oscar nominees in this new installment (10 p.m. ABC).

American Weed: The medical marijuana industry is explored in this new documentary series (10 p.m. National Geographic).

Royal Pains: The dramedy about a physician (Mark Feuerstein) serving the well-to-do in the Hamptons ends another season

(10 p.m. USA).


Presidential debate: Republican candidates meet in Arizona in the last debate before next week's Super Tuesday primaries (5 p.m. CNN).

Sex for Sale: American Escort: This new exposé delves into prostitution in the 21st century (9 p.m. National Geographic).


Mr. Smith Goes to Washington: James Stewart filibusters like no one's business in director Frank Capra's 1939 political fable (7 p.m. TCM).

Logan's Run: Michael York and Jenny Agutter are on the lam in this futuristic 1976 sci-fi thriller (11:45 p.m. TCM).


Basketball: The Boston Celtics face the Oklahoma City Thunder (4 p.m. ESPN); the Lakers meet the Dallas Mavericks (6:30 p.m. KCAL, ESPN); and the Clippers host the Denver Nuggets (7:30 p.m. FS Prime).

Hockey: The Kings visit the Colorado Avalanche (6 p.m. NBCSP).

College basketball: UC Santa Barbara plays Long Beach State (8 p.m. ESPN2).

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