We love us some Grey's Anatomy, but just when we get to know new characters, they're out the door. One recent mystery revolved around the abrupt dismissal of Brooke Smith (Dr. Erica Hahn). People were really starting to get into the idea of "Callica" (the pairing of Callie and Erica), when poof, she was gone. Melissa George will wrap her time as Meredith's unpredictable, bisexual friend Sadie in the next few weeks. Why was she on the show if not to be another love interest for Callie? What do you think about the ins and outs at Grey's?