30 ROCK
NBC, 8:00 p.m. ET
Tracy misbehaving is nothing new on this show, but this time he’s doing it in the social universe – on Twitter. And Liz (Tina Fey), as usual, has to deal with the fallout. But the subplot I’m most interested in watching this week has to do with guest star Nina Arianda, a terrific young Broadway actress who’s also clocked some time on TV on The Good Wife.