What television shows are you looking forward to returning in 2010?

The Fall 2009 season is coming to an end. Some shows have already begun their hiatus until the Spring 2010 season. Which ones can you not wait until they return? Which ones had a great or not-so-great mid-season ending? Which shows are actually not returning for a while, if not at all?

Or is there a show that hasn’t premiered yet that you are looking forward to? How about any brand new series?