They've been doing a good job of not being arc heavy this season while still teasing us with stuff here and there. It is Feb sweeps next month so I suspect that there will be episodes dealing with what we've learned so far this season...which isn't much, but still pretty significant. We know that this conspiracy goes beyond the Mayor, I think there were some who believed the Mayor was behind Joanna's murder. He still could be, but I doubt that now. Perhaps the State Governor? Or someone else? Hopefully we get some answers soon.