Edie receives shocking news at the gynecologist's office; an unexpected visitor; Wisteria Lane welcomes new neighbors who happen to be partners.
J.D. and Drew learn a tough lesson in mentoring when Dr. Cox and Lucy show them that the student is sometimes the teacher.
Tommy and Julia must make a life-and-death decision for their newborn twins; Sarah and Joe come to grips with the fate of their marriage; an unlikely candidate helps Justin face his impending future.