Yvonne Strahovski went from fighting crime to committing it. On Chuck Strahovski played tough-as-nails agent Sarah Walker, who was tasked with protecting Zachary Levi's Chuck but ended up falling for him.
All in all I liked this season of Dexter but thought that the writers just threw too much at us. I know they're trying to set up next season for the series finale, but they did it at the expense of some solid storytelling.
After a season-plus stretch of Dex-Deb drama in which Deb discovered her brother's secret, became his accomplice and fell in and out of love with him, she finally sank to his level in the Season 7 finale.