Weaver prepares to call her birth mother, while she treats a man who was accidentally run over by his daughter while she was drunk. Susan's first day back is typically hectic, as she treats a girl with an ectopic pregnancy who refuses to stay for treatment and a man faking a coma to escape his bookie. Abby seems to notice the chemistry between Susan and Carter and gets a little jealous. Cleo has gotten a better job 40 minutes outside of Chicago. The Greene household is pretty crazy now that Rachel is living there. After Elizabeth loses another patient to a post-op infection, an investigation is launched and someone is assigned to shadow her all day to check her cleanliness. Benton panics when Roger reveals that he can't find Reese--it turns out that Jackie picked him up from school after he got in a fight. Carter's day as chief resident is marred a little when his grandmother comes to the ER after slipping.