When Amy's friends warn her that Hannah (Sarah Drew) may win over Ephram's affections, Amy considers the possibility and starts to become jealous. Elsewhere, Andy investigates a possible case of child abuse when he treats a 13-year-old boy with a history of injuries; Edna gets annoyed when Harold replaces her filing system with a computer, so she decides to take drastic action. David: Carter Jenkins. Sara: Elizabeth Mitchell. Susie: Haley McCormick. Katie: Brighton Hertford.