Dr. Phil continues his conversation with Erin and Alex as the two continue to battle. Katherine joins her mother and sister and emotions run high as the sisters reach a standoff, with Alex storming out. Dr. Phil drills down to learn why they are letting a rivalry tear them apart. Next, Erin has expressed concern about Katherine's frequent disappearances, sometimes for days at a time, and her daughter's alleged drug use. What new information does Dr. Phil uncover when he questions the teen? Then, after taking a break to gather her emotions, Alex rejoins the conversation. Find out what worries Dr. Phil about the young mom's behavior. And, will Erin finally understand why her older daughter is so upset?

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