30 Rock (NBC)So Alec Baldwin continues to announce he's leaving the show. So viewership is, OK, the smallest it's ever been. So it isn't exactly a spring chicken, having been on the air for six seasons. So? So what! It's still, for our money, one of the sharpest comedies on network television, with a top-tier cast able to handle Tina Fey's fast and furious funnies, and TV's best guest stars, who just love to come and play (and play against type — More. Jon. Hamm. Please.) Please, NBC sirs, can we have s'more?