Callie then goes on to date Penny, who was the resident in charge of Derek Shepherd's case. She comes to a dinner party hosted by Meredith, who recognizes her. It is then discovered that Penny is going to be working at Grey Sloan Memorial. When everyone, including Callie, finds out who Penny actually is, they protest and try to get her off of the Grey Sloan Memorial residency line. She manages to stay on the line, despite all the others' pleads and wishes.