Laughing at NBC

James Poniewozik and Chris Harnick review last night's 30 Rock, which offered numerous joys for TV fans, as did Community's Law & Order episode, which got a thumbs up from devoted L&O fan Noel Kirkpatrick. And the laughs continued in Parks & Rec's debate episode, which offers even more joy in an extended cut on Hulu. More on Parks & Rec from Alyssa Rosenberg.