Katherine Disque

Claire has overdone it in Halloweens past and the neighbors definitely don't share her enthusiasm, so this year she's being forced to tone it down and keep it "kid-friendly," and Phil has an idea to hold an open house on Halloween night. Meanwhile, Mitch and Cam host a costume party while contending with Lily wondering who her real mom is, and Gloria's pregnancy hormones are on overdrive, making her even more hotheaded than usual.

Life's Lessons-After saying goodbye to Nurse Roberts (Aloma Wright), the Sacred Heart staff institutes some of her lessons into their lives. Though Carla (Judy Reyes) thinks they've all forgotten, Dr. Cox (John C. McGinley) takes time to reflect on his purpose; Elliot (Sarah Chalke) opens her heart to Keith (Travis Schuldt); and J.D. (Zach Braff) and Turk (Donald Faison) learn compassion. Ken Jenkins and Neil Flynn also star.

Sydney and Vaughn pose as a married couple in suburbia in order to find a weapon that could set society back to the Dark Ages. They quickly discover that "marriage" is a real strain on their relationship, and the picturesque neighborhood they've infiltrated is not nearly as innocuous as it seems - nor is it in America.