abductor and despite the efforts of Hunt and Altman, he dies. Avery and Koracick also depart in season 17, with Avery moving to Boston to take over his family's Foundation and Koracick leaving to assist him. In Season 18, Hayes moves back to his home country, Hunt and Altman flee the country, Marsh returns to Minnesota, Webber and Fox go on sabbatical, and Bailey resigns as chief of surgery, leaving Grey as chief of surgery of Grey-Sloan Memorial. Series synopsis Greys Anatomy follows the lives of surgical interns, residents, and attendings at the fictional Grey-Sloan Memorial Hospital (formerly Seattle Grace Hospital, Season 1–6, Seattle Grace Mercy West Hospital, Season 6–9, and then Grey-Sloan Memorial Hospital, Season 9–present), as the interns gradually develop into seasoned doctors through the mentoring of their residents, attendings, and chiefs of surgery. Each installment typically begins with a voice-over narrative from Meredith Grey or a season regular, foreshadowing the theme of the episode. Each season tends to represent the physicians' academic year, with each completed year qualifying the residents at a level higher in the surgical field. The season typically ends with a dramatic event such as a death or character departure. Most installments revolve around the doctors' everyday lives as surgeons, but the show also emphasizes their personal, as well as their professional, lives. The series often sets aside medical ethics concerns in order to foreground character development and relationships. While the physicians treat the illnesses of their patients, often through complex surgeries, they also display a competitive spirit and seek praise. After arriving at the hospital each morning, residents may argue over who gets the challenge of a certain patient who has arrived that day. A hospital superior assigns cases, often generating tension between the residents and their superiors. Within each episode, there are shifts from the doctors interacting with their patients, to scenes with their co-workers. Once assigned a case, each doctor diagnoses the patient, with the help of his or her attending physician, which usually leads to surgery. The surgeons tend to form personal connections with their patients, with a patient often conveying a message to his or her doctor, which unintentionally relates to the doctor's private life. The show displays the growth of relationships between the doctors, either friendly or romantic, which may produce conflicts between their personal and professional lives. Emotional scenes are often accompanied by an indie rock background