iCARLY
Nickelodeon, 8:00 p.m. ET
SERIES FINALE: This Nickelodeon sitcom, starring Miranda Cosgrove, has been so popular with tweens that Michelle Obama, a fan of the show because of her daughters, guest starred in one episode. (She’s not the first First Lady to take her message to a sitcom, either: Nancy Reagan, pushing her “Just Say No” anti-drug campaign in the 1980s, appeared on Diff’rent Strokes opposite Gary Coleman. As they say: Diff’rent Strokes for different folks.) Anyway, iCarly ends its run tonight, with a special one-hour episode called "iGoodbye." But Nickelodeon, one of the savviest cable marketers, isn’t letting the show’s audience down, or letting it escape. Supporting player Jennette McCurdy, who plays Sam Puckett, is set to star in a new Nick sitcom, Sam & Cat. And who’s playing Cat? Ariana Grande, who plays Cat Valentine in another Nickelodeon comedy, Victorious. Pro baseball should have as effective a farm system.