J.D.'s brother Dan returns for a surprise visit and Elliot learns that J.D. has been telling Dan that she still likes him. Carla and Turk freak out when they begin to discuss baby names. Dr. Kelso assigns Dr. Cox to assist Ted with malpractice claim paperwork after Dr. Cox insults Dr. Kelso's son. Meanwhile, a patient with weight-related problems needs an MRI, but he's too big for the machine.