The end of the second year has the residents finding their jobs too monotonous; luckily, Spence, an old college buddy of J.D. and Turk's, visits and lightens things up, perhaps a little too much. Dr. Cox learns the truth about baby Jack and confides in J.D. he doesn't think he'd make a good father. J.D. encourages Cox to imagine being a father, and as Dr. Kelso further attempts to break Elliot's spirit, Dr. Cox steps in.