J.D. and Danni breakup again because of J.D.'s continuing feelings for Elliot. When Elliot asks Sean to move in with her, J.D. decides he has to take action. Elsewhere, Dr. Kelso and Dr. Cox face-off over whether or not the hospital should provide full body scans. As the wedding grows near, the pressure to make their special day perfect starts to get the best of Carla and Turk.