Turk joins J.D. in the winner's circle after he performs his first solo surgery brilliantly, leaving Elliot struggling to find her own defining moment. While the young residents wrestle with their professional challenges, Dr. Cox deals with the reality of growing older when his back goes out and he refuses to admit that he needs help. Meanwhile, J.D. gains some insight into the life of the Janitor that sheds new light on his intriguing history.