When Turk and Carla set a date for their wedding, J.D. worries he may lose Turk's friendship; Elliot vows to win back her ex-boyfriend (Scott Foley).
J.D. turns to Carla and Turk for help diagnosing a patient with puzzling symptoms; running into her former flame (Scott Foley) prompts Elliot to undergo a complete makeover.
When J.D. asks for help teaching interns, Sean (Scott Foley) shares some of the training tips he picked up at Sea World; Dr. Cox finds the perfect pediatrician (Christopher Meloni) for his son.