Grey's Anatomy- "My Favorite Mistake"

Last night, on the latest Grey's Anatomy, many new exciting twists are added to the plot. In the previous episode, George and Callie got into a fight. So George went to Izzie to talk to her, and they end up drinking and they both had too much to drink. George ends up cheating on Callie, and the next day he wakes up to an empty bed wondering what happened.
The new episode begins with Izzie leaving the bed, and George waking up feeling under the weather. Callie runs into George at work, and tells him how they will have lunch with Callie's father and George will have to make a good impression. During the lunch confrontation, George remembers what happens, and stands up to her father, saying that he will provide and take care of Callie. She is very impressed with George and proud of him because no one has ever stood up to her dad before. Later in the episode, Callie's dad tells George that he better not hurt Callie. George then finds Izzie, and drags her into the linens closet to tell her that he remembers. Izzie thinks that he should tell Callie, but George refuses and says that it would hurt her too much. Dr. Burke and Christina are always having problems, but this time it's because Christina wants things to go back to the way it used to be with Dr. Burke. To do this, Christina brings him coffee and he refuses it. The doctors that are in competition for Chief's position are coming up with new 10 year plans, however McSteamy has a different idea. His idea is a "right now" plan, although he got this idea from Miranda. From previous episodes, the victim of the ferry burning has to choose a face for surgery. Choosing from three different pictures, she is having a hard time picking one. So she chooses 'Ava', a made-up character that Mark chose.
There is an interesting set of patients in the hospital, but the most interesting is the patient that has a disease where muscle turns into stone if touched. So being very careful around her, the doctors had to do surgery to save her, because even if they didn't do surgery, she would die. However, she died on the operating table from internal bleeding. In the clinic, Christina treats a construction man with diabetes. She makes him take off his shoes and socks and demands to see his foot. Like she already knew it was there, a sore was on the bottom of his foot. It was so bad, that she had to amputate his foot. Meredith is concentrating on her big surgery where she will help with McSteamy in surgery. Derek however, thinks that he is using her to impress Chief to show that he can be a good teacher. Meredith does the surgery anyhow and does a perfect job, and she tells Derek that her mother would be proud of her.
The episode ends with Izzie crying on her bed because she thinks that she has feelings for George.