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.
An obsessive-compulsive surgeon (Michael J. Fox) manages to turn his disorder into a distinct advantage.
Jordan's brother and sister return, but Dr. Cox learns that his brother-in-law Ben hasn't visited a doctor about his cancer in the two years he has been gone traveling the world.
J.D. and Elliot compete for the position of chief resident; Carla feels like she's losing control when everyone starts listening to Dr. Clock's advice; Dr. Cox and Turk have trouble removing a light bulb from a patient's posterior.
An ever present butterfly prompts the question on what could have happened different as Turk looks for his lucky do-rag for surgery, and Elliot tries to find a lost stuffed animal for a child needing a bone marrow transplant.
