After an unexpected night of passion with Elliot, J.D is left frozen in shock when Sean comes back into Elliot's life. Carla and Turk try to pass on advice to J.D but despite their efforts he finds himself in bed with a reinvented Danni on the rebound. Dr. Cox is shocked by the realization that his hatred of Dr. Miller may actually be an attempt to mask a secret crush. Meanwhile, Dr. Kelso and the Janitor square off on the do's and don'ts of hospital security.