[IMG1 L]Having just returned from her honeymoon with Meredith, Cristina looked for Burke, but he was nowhere to be found. Meredith, Cristina, Izzie and Alex spent their first day as residents with their own groups of interns - among the interns are George, who has decided to repeat his intern year after failing his exams, and Lexie Grey, Meredith's half-sister whom she has never met. Now that Derek's relationship with Meredith has reached an emotional impasse, he has started to look to his fellow doctors for friendship; Bailey wrestles with her place within the hospital now that her former interns report to new Chief Resident Callie; and Richard resumes his position as Chief of Surgery.