Kathryn’s return has to be HUGE!!! First off, it immediately gets Mary Margaret off the hook. Then, they’ll all want to know where in the world she’s been, and lastly, how they found Kathryn’s DNA in that heart. Let’s not forget Mary Margaret was two steps away from a trial. If we follow the story line that began with Kathryn’s disappearance, it stands to reason that The Return has to be about her.