J.D. and Danni hook up, prompting Dr. Cox to reveal to Danni that J.D. slept with Jordan. Meanwhile, Dr. Cox and J.D. deal with an extremely annoying patient, Jill Tracy, and almost miss something extremely important because they spend so little time with their patients (an average of 15 seconds, according to J.D.). Dr. Kelso goes temporarily deaf after using cheap stethoscopes, and Carla's medical advice to Elliot provokes tension between them.