Emmy Rossum and the things she can do with her face are the best reason to watch this show, and they are plenty reason enough.
Her line readings at the end of last episode upon being told that she was pregnant ("What?" "What?"). Her face in Cascading Failures back in the middle of season 3, when Fiona listens to the tip that Frank called in to Child Protective Services. The Fiona character is clearly the heart of the show, and Rossum blows everyone and everything else out of the water.
I also agree - the Fiona/Lip team is the best team on TV. Too bad they have more or less hung up their capes.
